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Safety Valve

I am writing to support the re-election of Ron Walter for Chelan County commissioner. I know Ron from the private and public sector and have always found him caring and very open to receive constituents’ input. He assembles the facts and makes sound decisions for our county. He is an honest and conscientious man, so why consider a change?

Keith Kuechmann

Wenatchee

Largent a wise choice

I live in Douglas County but own property in Chelan County, where voters now have the unique opportunity to voice a necessary change in the commissioners’ office. Recently Ron Walter, as commissioner, sought amendment of the definition of a “winery” under the Chelan County Code, as a favor to Saint Laurent Winery, owned by Mike and Laura Mrachek. This was after a hearing examiner correctly determined that the winery failed to meet the county regulatory definitions for that type of business, and was operating improperly.

Saint Laurent has been out of compliance with several of the original approved operating conditions established by the hearing examiner over three years ago, and has made little effort to become compliant. Rather, the Saint Laurent owners decided it a wiser investment to quickly become contributors to the Walter re-election campaign. (Source: Washington Public Disclosure Commission.)

This scenario underscores what decent citizens find most distasteful (vinegar rather than wine) about our elective process: the giving of political favor in exchange for campaign money. Put another way, Walter has sought to retroactively legalize prior improper operation of Saint Laurent, while rejecting the rule of law protecting surrounding property owners.

In exchange, Walter received money from those benefitted, the Mracheks. If you condone this kind of behavior, vote to retain Mr. Walter, because you certainly have a right to expect more of the same. But if you think that more of the same isn’t a wise moral choice or good planning practice, perhaps you should vote for Chuck Largent.

Scott Kane

East Wenatchee

Recount proof

Eastern Washington voters need to remember that we actually elected Dino Rossi as governor in 2004, twice! This was an amazing accomplishment considering how far left the Puget Sound region is. This will probably be our last chance to elect Dino or any other fiscal conservative as governor to give us a chance to avoid bankruptcy. If you want to see where we are headed with four more years of one-party control, just look at California. We will be broke and their answer will always be to increase spending and raise taxes. What businesses would want to locate here? Don’t forget, Gregoire plans to convince us we need a state income tax too!

Dino Rossi is an honest man who understands how to balance a budget, not a life-long politician serving special interests.

We need a recount-proof margin of victory to keep this election from being stolen again. Call your friends and relatives, drive people to vote, whatever it takes. Eastern Washington can make a difference if we stick together and vote for the best person for governor at this dangerous time — Dino Rossi!

Scott Hudson

Moses Lake

More change, please

Please vote on Nov. 4, and I would like to encourage you to vote for the Obama/Biden ticket. I ask this so that it might help my finances. Let me explain that I have been unemployed for the last four years, mostly by choice, so that I might migrate to a warmer climate during the cold months in Washington. I could not help but be excited by Sen. Obama’s comment about “spreading the wealth around,” and I for one could use a bit of the working persons’ wealth while I lounge on the beach.

So please keep working so that I might share in the fruits of your labor. Please don’t concern yourself over Sen. Obama’s lack of world experience or knowledge of our 57 states or the corrupt past of his associates, as I am more concerned about change, that change being the change of your money to my pocket.

Ron L. Schmidt

Riverside

Stick to news

I was dismayed that The Wenatchee World chose to run a front page story about the Wenatchee teacher who resigned after drinking on the job (The World, Oct 22).

The fact that she was intoxicated at work indicates that there is a significant problem of alcoholism with her. While there is much social stigma attached to alcoholism, it is a disease. It is extremely difficult to deal with.

Anyone who has dealt with the illness, and is still dealing with it, as well as anyone who has family or friends who are dealing with it, know that it is a day-by-day struggle. It results in great anxiety and pain for all involved.

It is certainly not appropriate fodder for discussion in public.

I can only hope that The World will refrain from such publications in the future and stick to real news.

Terry Fitzpatrick

North Central WEA UniServ

It’s capitalism that made us

It continuously amazes me the number of young and older adults who think business is bad, greedy and not paying taxes.

Small and large businesses are what make the wheels go round in this country. They contribute to the gross domestic product, create jobs, pay taxes, Social Security, unemployment, workers compensation etc., and make it possible for the “service industry ” — i.e., teachers, government, medical — to even exist.

Business has acquired a bad name because of the few CEOs, mainly in the finance world who have been greedy and produce nothing, simply shuttle figures and paperwork.

The CEO of Corning for five years drew zero compensation until Corning was “back on track.” Most business compensation is based on performance, as it should be for teachers, government employees, etc.

The media tend to print the negating or exceptions, but keep in mind, if it were not for the Alcoas, Comings, GMs, etc., in this country, we all would be drawing food stamps.

Please pass this information on to your children and teachers in our schools who sometimes have no clue as to what it takes to cut their paychecks. Again, capitalism is what has made this country great and the envy of the entire world.

Tom Hohn

Wenatchee

All letters must include the author’s signature, address and telephone number. There is a 300-word limit, and all letters are subject to editing.

Send letters to The Safety Valve, Box 1511, Wenatchee, WA 98807.

Tags: Control Valve, Technology
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Self-Acting Temperature Control Valves

NEW! Series 38R Low Cost Self-Acting Temperature Control Valves

W.E. Anderson Division of Dwyer Instruments Series 38R Self-Acting Temperature Control Valves require no external power sources and are ideal for regulating the temperature of tanks, process streams and various types of industrial equipment. The actuators are made with a rugged die-cast aluminum housing with a fully enclosed bellow assembly and internal over-range protection. Valves are offered in 1/2″ through 6″ connection sizes and 1/8″ through 6″ port sizes. The valve bodies are available in single-seated direct or reverse-acting, double-seated direct or reverse-acting, and 3-way designs with four choices of body material: bronze, cast iron, cast steel, and 316 stainless steel.

Actuators are available with or without indicating dials, or in Fail-Safe. Non-indicating actuators feature a lower profile and should be implemented where space constraints may be an issue while the indicating actuator allows the operator to verify the process temperature and aid in temperature adjustment. Fail-Safe actuators are designed to cause the valve to fail in the safe control position (open in cooling application, closed in heating application) should some accidental damage occur to the terminal system, resulting in loss of pressure charge. Also available with the Series 38R are a wide range of capillaries, bulbs, and thermowells.

Tags: Control Valve, Technology
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Fisher® control valve ranges

Emerson Process Management announces the completion of a significant expansion of the manufacturing capabilities at its control valve manufacturing plant located at Cernay, in the Alsace region of France. The investment will enable Emerson to meet increasing demand for its Fisher® control valve ranges, in particular for the larger sizes and for special valves such as those used on turbine bypass or anti surge applications. The European market for valves has increased consistently over the last three years and the output of the Cernay factory has doubled over the same period.

The project involved the building of additional manufacturing space as well as the internal reorganisation of the production and assembly areas in line with the latest “Lean” manufacturing strategies. The new building has provided 475 square metres of additional floor space and is 9 metres tall to accommodate the large special valves. New test equipment and a new painting facility have been installed, along with an integrated customer inspection area.

The Fisher range of control valves is suitable for use in general purpose applications as well as more arduous duties. Valves sizes range from ½’’ to 24’’ for sliding stem globe valves and from 1’’ to 72’’ for rotary valves. Emerson offers low noise Whisper Trim® and anti-cavitation Cavitrol® trims as well as a complete range of exotic materials and coatings including Hastelloy, Titanium, Inconel 625, Monel and Super duplex.

The Fisher range of control valve instrumentation includes the industry leading FIELDVUE® range of digital valve controllers. The FIELDVUE controller is a key component of Emerson’s PlantWeb® digital plant architecture which networks intelligent instruments that deliver diagnostic data for predictive maintenance, leading to increased availability of production and distribution facilities.

The Cernay plant is the largest of the five Emerson facilities manufacturing Fisher control valves in Europe. Its production currently represents more than half of the total European production. Cernay is also the only European plant compliant with nuclear industry requirements and is able to deliver valves and instruments for this growing market.

Tags: Control Valve, emerson
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Pepper & FUCHS KFD

DC repeater without auxiliary power
KFD0-CS-Ex1.53

1-channel, Transmission range: 0 mA … 40 mA, Low voltage drop, Accuracy 1 %, Output EEx ia IIC, Device installation permissible in zone 2, EMC acc. to NAMUR NE 21, Up to SIL2 acc. to IEC 61508, Rated voltage: loop powered, SIL/IEC 61508, Explosion protection: Ex protection, Field circuit: 0-40 mA, Safe area: 0-40 mA, Transfer direction: to the field

Solenoid drivers
KFD2-VM-Ex1.3*

Explosion protection: Ex input

DC repeater without auxiliary power
KFD0-CS-Ex2.53

2-channel, Transmission range: 0 mA … 40 mA, Low voltage drop, Accuracy 1 %, Output EEx ia IIC, Device installation permissible in zone 2, EMC acc. to NAMUR NE 21, Up to SIL2 acc. to IEC 61508, Rated voltage: loop powered, SIL/IEC 61508, Explosion protection: Ex protection, Field circuit: 0-40 mA, Safe area: 0-40 mA, Transfer direction: to the field

Isolated switch amplifier
KFD2-ST-Ex2

2-channel, Control circuit EEx ia IIC, 24 V DC nominal supply voltage, Reversible mode of operation, Lead breakage (LB) monitoring and short-circuit (SC) monitoring, 1 active electronic output per channel, EMC acc. to NAMUR NE 21, Input: NAMUR sensor, Rated voltage: 20 … 35 V DC, Output: Transistor, Explosion protection: Ex input

Isolated switch amplifier
KFD2-SOT-Ex1

1-channel, Control circuit EEx ia IIC, 24 V DC nominal supply voltage, Reversible mode of operation, Lead breakage (LB) monitoring and short-circuit (SC) monitoring, 1 passive electronic output, EMC acc. to NAMUR NE 21, Input: NAMUR sensor, Rated voltage: 20 … 35 V DC, Output: Optocoupler, Explosion protection: Ex input

Thermometer resistance repeater
KFD2-RR-Ex1

1-channel, Input EEx ia IIC, Device installation permissible in zone 2, 24 V DC supply voltage, Accuracy 0.1 %, EMC acc. to NAMUR NE 21, Rated voltage: 20 … 35 V DC, Explosion protection: Ex protection, Field circuit: Resistance, Safe area: Resistance, Transfer direction: to the control system

DC repeater without auxiliary power
KFD0-CS-Ex2.52

Transmission range: 4 mA … 20 mA, Accuracy 0.1 %, Input EEx ia IIC, Device installation permissible in zone 2, EMC acc. to NAMUR NE 21, Rated voltage: loop powered, Explosion protection: Ex protection, Field circuit: 4-20 mA, Safe area: 4-20 mA, Transfer direction: To the control system

Isolated switch amplifier
KFD2-ST-Ex1

1-channel, Control circuit EEx ia IIC, 24 V DC nominal supply voltage, Reversible mode of operation, Lead breakage (LB) monitoring and short-circuit (SC) monitoring, 2 active electronic outputs, EMC acc. to NAMUR NE 21, Input: NAMUR sensor, Rated voltage: 20 … 35 V DC, Output: Transistor, Explosion protection: Ex input

Switch Amplifier
KFD2-SOT-Ex2

2-channel isolated barrier, 24 V DC supply (Power Rail), Isolated dry contacts or NAMUR inputs, Isolated passive transistor output, Line fault detection (LFD), Reversible mode of operation, Input: NAMUR sensor, Rated voltage: 20 … 35 V DC, Output: Optocoupler, Explosion protection: Ex input

DC repeater without auxiliary power
KFD0-CS-Ex1.52

Isolated switch amplifier
KFD2-SR2-2.2S

2-channel, Reversible mode of operation, 1 relay output per channel with 2 NO contatcs each, EMC acc. to NAMUR NE 21, LB/SC monitoring, LB/SC collective error message via Power Rail, Usable up to SIL2 acc. to IEC 61508

Electrode relay
KFD2-ER-1.W.LB

1-channel, Relay for conductive limit value detection, Minimum/maximum control, On/off control system, Open/closed circuit current principle switchable, LB monitoring, LB collective error message via Power Rail, EMC acc. to NAMUR NE 21

Isolated switch amplifier
KFD2-SR2-Ex2.2S

2-channel, Control circuit EEx ia IIC, Device installation permissible in zone 2, Reversible mode of operation, 1 relay output per channel with 2 NO contatcs each, EMC acc. to NAMUR NE 21, LB/SC monitoring, LB/SC collective error message via Power Rail, Up to SIL2 acc. to IEC 61508, Input: NAMUR sensor, Rated voltage: 20 … 30 V DC, Output: relay, SIL/IEC 61508, Explosion protection: Ex input

Electrode relay
KFD2-ER-Ex1.W.LB

Solenoid driver
KFD2-VM-Ex1.35.L

1-channel, 3 logic inputs, Service bridging of the output by front connector, Output EEx ia IIC, 24 V DC nominal supply voltage, LED signalling of the switch state, EMC acc. to NAMUR NE 21, Input: with prelogic, Rated voltage: 20 … 30 V DC, Explosion protection: Ex-Output, Output rated operating current: 17 mA

Transmitter power supply
KFD2-CR4-Ex2

2-channel, Input EEx ia IIC, U o = 25.2 V, Device installation permissible in zone 2, 24 V DC supply voltage, EMC acc. to NAMUR NE 21, Up to SIL2 acc. to IEC 61508, Input: 2-wire transmitter, Rated voltage: 20 … 35 V DC, SIL/IEC 61508, Output signal: 0/4 … 20 mA, Explosion protection: Ex input

Repeater
KFD0-CS-Ex2.54

2-channel isolated barrier, 24 V DC supply (loop powered), SMART fire alarm input, Current input 1 mA … 20 mA, Rated voltage: loop powered, Explosion protection: Ex protection, Field circuit: 4-20 mA, Safe area: 4-20 mA, Transfer direction: to the field

Isolated switch amplifier
KFD2-SR-Ex2

2-channel, Control circuit EEx ia IIC, 24 V DC rated operational voltage, Reversible mode of operation, Lead breakage (LB) monitoring and short-circuit (SC) monitoring, 1 signal output per channel with 1 NO, Input: NAMUR sensor, Rated voltage: 20 … 35 V DC, Output: relay, Explosion protection: Ex input

Isolated switch amplifier
KFD2-SR-Ex1.4S.LK

1-channel, Control circuit EEx ia IIC, 24 V DC supply voltage, Reversible mode of operation, Adjustable pulse extension, Lead breakage (LB) monitoring and short-circuit (SC) monitoring, 4 signal outputs, 1 NO contact each, Error message output, NO contact, Input: NAMUR sensor, Rated voltage: 20 … 35 V DC, Output: relay, Explosion protection: Ex-Input

Solenoid driver
KFD0-SD2-Ex2.1245

2-channel, Output EEx ia IIC, Up to SIL3 acc. to IEC 61508, Rated voltage: loop powered, SIL/IEC 61508, Explosion protection: Ex-Output, Output rated operating current: 45 mA

Isolated switch amplifier
KFD2-SRT-Ex1

1-channel, Control circuit EEx ia IIC, 24 V DC nominal supply voltage, Reversible mode of operation, Lead breakage (LB) monitoring and short-circuit (SC) monitoring, 1 active electronic output, 1 relay output, EMC acc. to NAMUR NE 21, Input: NAMUR sensor, Rated voltage: 20 … 35 V DC, Output: Relay + Transistor, Explosion protection: Ex input

Label carrier
KFD0-LC1-XXX

For additional labeling (measuring station numbers, signal names etc.) of the K-modules in the control cabinet , Length up to 500 mm

Label carrier
KFD0-LC1-YYY

For additional labeling (measuring station numbers, signal names etc.) of the K-modules in the control cabinet , Length 510 mm … 1000 mm

Electrode relay
KFD2-ER-1.6

1-channel, Relay for conductive limit value detection, Adjustable sensitivity, Measuring circuit in acc. with VDE 0100 part 410 ‘Funktionskleinspannung’, Minimum/maximum control, Open/closed circuit current principle switchable, EMC acc. to NAMUR NE 21, This model replaces KHA6-ER-1.* and HR-122620

Electrode relay
KFD2-ER-1.5

Overspeed/underspeed monitor
KFD2-DWB-1.D

1-channel, 24 V DC supply (Power Rail), Dry contacts or NAMUR inputs, Frequency up to 12 kHz/720 krpm, 2 relay contact outputs, Start-up override, Line fault detection, Up to SIL2 acc. to IEC 61508, Function (P2P): Limit value, Output: 2 x 1 Changeover contact, SIL/IEC 61508, Display

Overspeed/underspeed monitor
KFD2-DWB-Ex1.D

1-channel, 24 V DC supply (Power Rail), Dry contacts or NAMUR inputs, Frequency up to 5 kHz/300 krpm, 2 relay contact outputs, Start-up override, Line fault detection, Up to SIL2 acc. to IEC 61508, Function (P2P): Limit value, Output: 2 x 1 Changeover contact, SIL/IEC 61508, Display, Explosion protection: Ex input

Isolated switch amplifier, timer relay
KFD2-DU-Ex1.D

1-channel, Control circuit EEx ia IIC, Switching amplifier with timing, Maximum input frequency 80 Hz, 1 relay output, 1 potential-free electronic output, Pulse divider up to 1 kHz, Time function: one shot output, one shot output retrigger, pulse extension, pulse limitation , on-delay, off-delay, auxiliary switch, Time range of the output function from 10 ms … 60 min, Reset function, Parameterisation via control panel, Lead breakage (LB) monitoring and short-circuit (SC) monitoring, Input: NAMUR sensor

Transmitter power supply
KFD2-CR4-2

2-channel, Device installation permissible in zone 2, 24 V DC supply voltage, EMC acc. to NAMUR NE 21, Input: 2-wire transmitter, Rated voltage: 20 … 35 V DC, SIL/IEC 61508, Output signal: 0/4 … 20 mA

Transmitter Power Supply
KFD2-CR4-1

1-channel signal conditioner, 24 V DC supply (Power Rail), 2-wire transmitters or current sources, Output 0/4 mA … 20 mA, Accuracy 0.1 %, Up to SIL2 acc. to IEC 61508, Input: 2-wire transmitter, Rated voltage: 20 … 35 V DC, SIL/IEC 61508, Output signal: 0/4 … 20 mA, Input, current source

Temperature Trip Value
KFD2-GU-Ex1

1-channel isolated barrier, 24 V DC supply (Power Rail), Thermocouple, RTD, voltage or current input, 2 relay contact outputs, Programmable high/low alarm, Configurable by PACTware TM, Sensor burnout detection, Rated voltage: 19 … 35 V DC, Output: 2 x 1 Changeover contact, Explosion protection: Ex input

Transmitter supply isolator
KFD2-CR-1.300

1-channel, 24 V DC supply voltage, Galvanic isolated measuring circuits, Output: allowable load <= 1 kOmega, EMC acc. to NAMUR NE 21, Input: 3-wire transmitter, Rated voltage: 20 … 35 V DC, Output signal: 0 … 20 mA / 4 … 20 mA, Input, current source

Transmitter power supply
KFD2-CR4-Ex1

1-channel, Input EEx ia IIC, U o = 25.4 V, Device installation permissible in zone 2, 3-way galvanic isolation, 24 V DC supply voltage, EMC acc. to NAMUR NE 21, Up to SIL2 acc. to IEC 61508, Input: 3-wire transmitter, Rated voltage: 20 … 35 V DC, SIL/IEC 61508, Output signal: 0/4 … 20 mA, Input, current source, Explosion protection: Ex input

Transmitter supply isolator
KFD2-CRG-Ex1.D

1-channel, Analogue input 0/4 mA … 20 mA EEx ia IIC, Analogue output 0/4 mA … 20 mA, 2 relay outputs, Each relay output individually parameterisable as high/low alarm, Lead breakage (LB) monitoring and short-circuit (SC) monitoring, Parameterisation via PC or control panel, Up to SIL2 acc. to IEC 61508, Input: 3-wire transmitter, Rated voltage: 20 … 30 V DC, SIL/IEC 61508, Output signal: 0 … 20 mA, Limit alarm relay, Display, Input, current source, Explosion protection: Ex input

SMART transmitter power supply
KFD2-STC4-Ex1.H

1-channel, Input EEx ia IIC, U o = 27.2 V, Very high field voltage, Galvanically isolated output, 24 V DC supply voltage, SMART capable up to 7.5 kHz (-3 dB), EMC acc. to NAMUR NE 21, Up to SIL2 acc. to IEC 61508 in preparation, Input: 3-wire transmitter, Rated voltage: 20 … 35 V DC, SIL/IEC 61508, Output signal: 0/4 … 20 mA (overload > 25mA), HART transfer, Input, current source, Explosion protection: Ex input

Segment coupler
KFD2-BR-1.MOD

Segment coupler for MODBUS RTU, Segment coupler for a non-instrinsically safe MODBUS RTU segment, MODBUS RTU IEC 61158-2, 31.25 kBit/s, Master independent, Up to 32 devices can be connected to the MODBUS RTU segment , 24 V DC rated operational voltage, Removable terminals and Power Rail

Current/voltage repeater
KFD2-CD-Ex1.32

1-channel, Output EEx ia IIC, 24 V DC supply voltage, Device installation permissible in zone 2, Conversion of current/voltage or voltage/current, Elevation/Suppression of the ‘life zero’, Accuracy 0.1 %, EMC acc. to NAMUR NE 21, Up to SIL2 acc. to IEC 61508, Rated voltage: 20 … 35 V DC, SIL/IEC 61508, Explosion protection: Ex protection, Field circuit: 0(4)-20 mA, Safe area: 0(4)-20 mA, Transfer direction: to the field

SMART transmitter power supplies
KFD2-STC4-Ex2-Y72195

2-channel, Input EEx ia IIC, U o = 25.2 V, Device installation in Zone 2, 24 V DC supply voltage, EMC acc. to NAMUR NE 21, Output as current sink, Up to SIL2 acc. to IEC 61508, Input: 2-wire transmitter, Rated voltage: 20 … 35 V DC, SIL/IEC 61508, Output signal: 0/4 … 20 mA (overload > 25 mA), HART transfer, Output, current sink, Explosion protection: Ex input

Solenoid Driver
KFD0-SD2-Ex1.1045

1-channel isolated barrier, 24 V DC supply (loop powered), Current limit 45 mA at 10 V DC, Up to SIL3 acc. to IEC 61508, Rated voltage: loop powered, SIL/IEC 61508, Explosion protection: Ex-Output, Output rated operating current: 45 mA

Strain Gauge Converter
KFD2-WAC2-1.D

1-channel signal conditioner, 24 V DC supply (Power Rail), Strain gauge input, Output 0 mA … +- 20 mA or 0 V … +- 10 V, Relay contact output, Programmable high/low alarm, RS 485 interface, Line fault detection (LFD), Input: DMS bridges, Rated voltage: 20 … 35 V DC, Output: 4-20 mA, Limit alarm relay, Display

Solenoid driver
KFD2-VD-Ex1.1560

1-channel, Output EEx ib IIC, 24 V DC supply voltage, Logic input to switch the field voltage, LED signalling of the switch state, Input: with prelogic, Rated voltage: 20 … 35 V DC, Explosion protection: Ex-Output, Output rated operating current: 60 mA

SMART transmitter power supply
KFD2-STC4-Ex1.2O.H

1-channel, 24 V DC supply (Power Rail), 2- or 3-wire HART transmitter, Dual 4 mA … 20 mA output, Terminals with test points, High field voltage 17.6 V DC, Up to SIL2 acc. to IEC 61508 in preparation, Input: 3-wire transmitter, Rated voltage: 20 … 35 V DC, SIL/IEC 61508, Output signal: 0/4 … 20 mA (overload > 25mA), HART transfer, Dual output, Input, current source, Explosion protection: Ex input

Strain Gauge Converter
KFD2-WAC2-Ex1.D

1-channel isolated barrier, 24 V DC supply (Power Rail), Strain gauge input, Output 0 mA … +- 20 mA or 0 V … +- 10 V, Relay contact output, Programmable high/low alarm, RS 485 interface, Line fault detection (LFD), Input: DMS bridges, Rated voltage: 20 … 35 V DC, Output: 4-20 mA, Limit alarm relay, Display, Explosion protection: Ex input

Solenoid drivers
KFD2-VD-Ex1.1835

1-channel, Output EEx ib IIC, 24 V DC nominal supply voltage, Logic input for connection and disconnection, LED signalling of the switch state, Input: with prelogic, Rated voltage: 20 … 35 V DC, Explosion protection: Ex-Output, Output rated operating current: 35 mA

Electrode relay
KFD2-ER-2.W.LB

2-channel, Relay for conductive limit value detection, Minimum/maximum control, On/off control system, Open/closed circuit current principle switchable, LB monitoring, LB collective error message via Power Rail, EMC acc. to NAMUR NE 21

Solenoid driver
KFD2-SD-Ex1.17

1-channel, Device installation in Zone 2, Output EEx ia IIC, Current limit: 65 mA, Up to SIL3 acc. to IEC 61508, Input: without prelogic, Rated voltage: loop powered, SIL/IEC 61508, Explosion protection: Ex-Output, Output rated operating current: 65 mA

Repeater
KFD0-CS-Ex1.54-Y207411

1-channel isolated barrier, 24 V DC supply (loop powered), SMART fire alarm input, Current input 1 mA … 20 mA, Rated voltage: loop powered, Explosion protection: Ex protection, Field circuit: 4-20 mA, Safe area: 4-20 mA, Transfer direction: to the field

Solenoid driver
KFD0-SD2-Ex1.1065

1-channel, Output EEx ia IIC, Up to SIL3 acc. to IEC 61508, Rated voltage: loop powered, SIL/IEC 61508, Explosion protection: Ex-Output, Output rated operating current: 65 mA

Repeater
KFD0-CS-Ex2.54-Y207412

DC repeater without auxiliary power
KFD0-CS-1.50

Galvanic isolated measuring circuits, Accuracy 0.1 %, EMC acc. to NAMUR NE 21, Up to SIL2 acc. to IEC 61508, Rated voltage: loop powered, SIL/IEC 61508, Field circuit: 4-20 mA, Safe area: 4-20 mA, Transfer direction: to the field

Solenoid driver
KFD0-SD2-Ex1.1180

1-channel, Output EEx ia IIB, Up to SIL3 acc. to IEC 61508, Rated voltage: loop powered, SIL/IEC 61508, Explosion protection: Ex-Output, Output rated operating current: 80 mA

Relay Module
KFD0-RSH-1-Y191196

1-channel signal conditioner, 24 V DC supply (loop powered), Fail-safe relay contact output, Logic input 16 V DC … 30 V DC, non-polarized, Special version with test pulse suppression for Trident system from Triconex, Up to SIL3 acc. to IEC 61508

DC repeater without auxiliary power
KFD0-CS-2.50

SMART transmitter power supplies
KFD2-STC3-Ex1

1-channel, Input EEx ia IIC, U 0 = 25.2 V, 24 V DC nominal supply voltage, SMART capable up to 40 kHz (-1dB), EMC acc. to NAMUR NE 21, Input: 2-wire transmitter, Rated voltage: 20 … 35 V DC, Output signal: 4 … 20 mA , max. load 1000 Ohm , for HART >= 230 Ohm, HART transfer, Explosion protection: Ex input

SMART transmitter power supplies
KFD2-STV3-Ex1-1

1-channel, Input EEx ia IIC, U 0 = 25.2 V, 24 V DC nominal supply voltage, SMART capable up to 40 kHz (-1dB), EMC acc. to NAMUR NE 21, Input: 2-wire transmitter, Rated voltage: 20 … 35 V DC, Output signal: 1 … 5 V , internal resistance approx. 305 Ohm, HART transfer, Explosion protection: Ex input

SMART transmitter power supplies
KFD2-STV3-Ex1-2

1-channel, Input EEx ia IIC, U 0 = 25.2 V, 24 V DC nominal supply voltage, SMART capable up to 40 kHz (-1dB), EMC acc. to NAMUR NE 21, Input: 2-wire transmitter, Rated voltage: 20 … 35 V DC, Output signal: 2 … 10 V , internal resistance approx. 305 Ohm, HART transfer, Explosion protection: Ex input

Transmitter power supply
KFD2-STV4-Ex2-2

2-channel, Input EEx ia IIC, U o = 25.2 V, Device installation permissible in zone 2, 24 V DC supply voltage, SMART capable up to 7.5 kHz (-3 dB), EMC acc. to NAMUR NE 21, Up to SIL2 acc. to IEC 61508, Input: 2-wire transmitter, Rated voltage: 20 … 35 V DC, SIL/IEC 61508, Output signal: 0/2 … 10 V, HART transfer, Explosion protection: Ex input

Place Holder Barrier
KFD0-LGH-Y34868

IS K-System place holder module, Housing width 20 mm, Marshalling for field and control side circuits, No electrical function: empty housing

Current repeater
KFD2-CD2-Ex1

1-channel, Output EEx ia IIC, Accuracy 0.1 %, EMC acc. to NAMUR NE 21, Up to SIL2 acc. to IEC 61508, Rated voltage: 10 … 35 V DC, Explosion protection: Ex protection, Field circuit: 4-20 mA, Safe area: 4-20 mA, Transfer direction: To the field

RS 232 repeater
KFD2-FF-Ex2.RS232

RS 232 transmission, Corresponds to EIA standard RS 232C and RS 232D, Field circuit EEx ia IIC, Bi-directional transmission, Rated voltage: 15 … 35 V DC, Explosion protection: Ex protection, Field circuit: RS 232, Safe area: RS 232, Transfer direction: to the field

SMART repeater
KFD2-SCD2-Ex1.LK

1-channel, Lead breakage (LB) monitoring and short-circuit (SC) monitoring via Power Rail, Suitable for HART communication (galvanically isolated), Accuracy 0.1 %, EMC acc. to NAMUR NE 21, Up to SIL2 acc. to IEC 61508, Rated voltage: 10 … 35 V DC, SIL/IEC 61508, HART transfer, Explosion protection: Ex protection, Field circuit: 4-20 mA, HART, Safe area: 4-20 mA, HART, Transfer direction: to the field

Temperature converter
KFD2-UT2-2-1

2-channel, 2 inputs/2 outputs freely configurable, 3-way galvanic isolation, Accuracy +- 0.1 %, Resistance sensors acc. to IEC 751 or GOST 50353-92, Thermocouples acc. to IEC 584-1, GOST 50431-92 or GOST P85.585-2001, 2-wire resistance 0 Omega … 20 kOmega, 3-wire potentiometer 0.8 kOmega … 20 kOmega, Voltage signals between -100 mV and +100 mV, Internal or external cold junction compensation, Sensor burnout and short-circuit monitoring, Collective error message via Power Rail, Input: Temperature

Temperature converter
KFD2-UT2-1-1

1-channel, 3-way galvanic isolation, Accuracy +- 0.1 %, Adjustment option of temperature measuring range for Pt100, Ni100 in 2-, 3- or 4-wire versions, Adjustment option of thermocouple (B, E, J, K, L, N, R, S or T), 2-wire resistance 0 Omega … 20 kOmega, 3-wire potentiometer 0.8 kOmega … 20 kOmega, Internal or external cold junction compensation, Sensor burnout monitoring for thermocouples, Sensor burnout and short-circuit monitoring (SC) for Pt100, Online adjustments via serial interface to PC

SMART transmitter power supply
KFD2-STV4-Ex1-1

1-channel, Device installation permissible in zone 2, Input EEx ia IIC, U o = 25.4 V, 24 V DC supply voltage, SMART capable up to 7.5 kHz (-3 dB), EMC acc. to NAMUR NE 21, Up to SIL2 acc. to IEC 61508, Input: 3-wire transmitter, Rated voltage: 20 … 35 V DC, SIL/IEC 61508, Output signal: 0/1 … 5 V, HART transfer, Input, current source, Explosion protection: Ex input

Transmitter power supply
KFD2-STV4-Ex1.2O-2

1-channel, Device installation permissible in zone 2, Input EEx ia IIC, U o = 25.4 V, 2 galvanically isolated outputs, 24 V DC supply voltage, SMART capable up to 7.5 kHz (-3 dB), EMC acc. to NAMUR NE 21, Up to SIL2 acc. to IEC 61508, Input: 3-wire transmitter, Rated voltage: 20 … 35 V DC, SIL/IEC 61508, Output signal: 0/2 … 10 V, HART transfer, Input, current source, Explosion protection: Ex input

Transmitter power supply
KFD2-STV4-Ex2-1

2-channel, Input EEx ia IIC, U o = 25.2 V, Device installation permissible in zone 2, 24 V DC supply voltage, SMART capable up to 7.5 kHz (-3 dB), EMC acc. to NAMUR NE 21, Up to SIL2 acc. to IEC 61508, Input: 2-wire transmitter, Rated voltage: 20 … 35 V DC, SIL/IEC 61508, Output signal: 0/1 … 5 V, HART transfer, Explosion protection: Ex input

SMART transmitter power supply
KFD2-STV4-Ex1-2

1-channel, Device installation permissible in zone 2, Input EEx ia IIC, U o = 25.4 V, 24 V DC supply voltage, SMART capable up to 7.5 kHz (-3 dB), EMC acc. to NAMUR NE 21, Up to SIL2 acc. to IEC 61508, Input: 3-wire transmitter, Rated voltage: 20 … 35 V DC, SIL/IEC 61508, Output signal: 0/2 … 10 V, HART transfer, Input, current source, Explosion protection: Ex input

SMART transmitter power supply, output current sink
KFD2-STC4-Ex1.2O-Y122582

1-channel, Device installation permissible in zone 2, Input EEx ia IIC, U o = 25.4 V, 2 galvanically isolated outputs, 24 V DC supply voltage, SMART capable up to 7.5 kHz (-3 dB), EMC acc. to NAMUR NE 21, Up to SIL2 acc. to IEC 61508, Input: 3-wire transmitter, Rated voltage: 20 … 35 V DC, SIL/IEC 61508, Output signal: 0/4 … 20 mA (overload > 25mA), HART transfer, Dual output, Output, current sink, Input, current source, Explosion protection: Ex input

SMART transmitter power supply
KFD2-STV4-Ex1.2O-1

1-channel, Device installation permissible in zone 2, Input EEx ia IIC, U o = 25.4 V, 2 galvanically isolated outputs, 24 V DC supply voltage, SMART capable up to 7.5 kHz (-3 dB), EMC acc. to NAMUR NE 21, Up to SIL2 acc. to IEC 61508, Input: 3-wire transmitter, Rated voltage: 20 … 35 V DC, SIL/IEC 61508, Output signal: 0/1 … 5 V, HART transfer, Dual output, Input, current source, Explosion protection: Ex input

SMART transmitter power supply, output current sink
KFD2-STC4-Ex1-Y122583

1-channel, Device installation permissible in zone 2, Input EEx ia IIC, U o = 25.4 V, Galvanically isolated output, 24 V DC supply voltage, SMART capable up to 7.5 kHz (-3 dB), EMC acc. to NAMUR NE 21, Up to SIL2 acc. to IEC 61508, Input: 3-wire transmitter, Rated voltage: 20 … 35 V DC, SIL/IEC 61508, Output signal: 0/4 … 20 mA (overload > 25mA), HART transfer, Output, current sink, Input, current source, Explosion protection: Ex input

Signal converter for current/voltage
KFD0-CC-Ex1

1-channel, Input EEx ia IIC, Loop powered 12 V DC … 35 V DC, Galvanic isolated measuring circuits, Current range (0/4 mA … 20 mA) or voltage range (0/1 V … 5 V, 0/2 V … 10 V) adjustable via DIP switch, fine tuning (approx. 1%) of the span and zero point possible via DIP switch, Fine adjustment (approx. 1 %) of the span and of the zero point is possible using a potentiometer, Output: 4 mA … 20 mA, EMC acc. to NAMUR NE 21, Input: Current/voltage, Rated voltage: 12 … 35 V DC loop powered

Temperature converter
KFD2-UT2-Ex1

1-channel, 3-way galvanic isolation, Resistance sensors acc. to IEC 751 or GOST 50353-92, Thermocouples acc. to IEC 584-1, GOST 50431-92 or GOST P85.585-2001, 2-wire resistance 0 Omega … 20 kOmega, 3-wire potentiometer 0.8 kOmega … 20 kOmega, Voltage signals between -100 mV and +100 mV, Input: Temperature, Rated voltage: 20 … 30 V DC, Output: 4-20 mA, Explosion protection: Ex input

Voltage repeater
KFD2-VR-Ex1.19

1-channel, Input EEx ia IIC, 24 V DC supply voltage, EMC acc. to NAMUR NE 21, Rated voltage: 20 … 35 V DC, Explosion protection: Ex protection, Field circuit: 0-10 V, Safe area: 0-10 V, Transfer direction: to the control system

Transformer isolated barrier for potentiometer
KFD2-PT2-Ex1**

1-channel, Input EEx ia IIC, 24 V DC supply voltage, Current or voltage output, Accuracy 0.05 %, EMC acc. to NAMUR NE 21, Input: Resistance, Rated voltage: 20 … 35 V DC, Output: 0-10 V, Explosion protection: Ex-Input

Signal converter with trip value
KFD2-USC-1.D

1-channel, 24 V DC supply (Power Rail), Scaleable current or voltage input, Current or voltage output, Relay contact output, Programmable via control panel, Line fault detection

DC repeater without auxiliary power
KFD0-CS-2.51P

Polarity reversal protected, Accuracy 1 %, EMC acc. to NAMUR NE 21, Up to SIL2 acc. to IEC 61508, Rated voltage: loop powered, SIL/IEC 61508, Explosion protection: Ex protection, Field circuit: 0-40 mA, Safe area: 0-40 mA, Transfer direction: To the field

Temperature converter with trip relays
KFD2-GUT-1.D

1-channel, Input for voltage 0 V … 1 V, 0 V … 10 V, -100 mV … +100 mV, Input RTD: Pt100, Pt500, Pt1000, Ni100,Ni1000 2-, 3- and 4-wire, Input potentiometer 800 Ohm … 20 kOhm 2-, 3- and 5-wire, Input thermocouple type B, E, J, K, L, N, R, S, T, Redundant input for thermocouple for plausibility check, Sensor burnout monitoring, 2 relay outputs, Each relay output individually parameterisable as high/low alarm, Analogue output 0/4 mA … 20 mA, Manual adjustments or adjustments via PC

Solenoid driver, power amplifier
KFD2-SL-4

4-channel, Control via logic inputs, 24 V DC supply voltage, Output current: 600 mA/channel (resistive, inductive, capacitive load), All channels can be simultaneously turned off via a galvanically isolated input., Up to SIL2 acc. to IEC 61508, Input: with prelogic, Rated voltage: 20 … 30 V DC, SIL/IEC 61508, Explosion protection: No Ex-protection, Fault message output, Output rated operating current: 600 mA

HART isolator
KFD0-SI-Ex4

4-channel, Field circuits intrinsically safe EEx ia IIC, Device installation permissible in the safe area or in zone 2, Couples HART signals in the field circuit (bi-directional)

Isolated switch amplifier
KFD2-SH-Ex1.T.OP

1-channel, Control circuit EEx ia IIC, Lead breakage (LB) monitoring and short-circuit (SC) monitoring, 1 safety-related active electronic output SIL3 acc. to IEC/EN 61508 and acc. to DIN VDE 0660, part 209, Product classification in accordance with ISO 13849-1 (EN 954-1 category 3), 1 relay output repeats the state of the input circuit, 1 error output with 1 NO contact, EMC acc. to NAMUR NE 21, Up to SIL3 acc. to IEC 61508, Input: NAMUR sensor, Rated voltage: 20 … 30 V DC, Output: Transistor

Signal converter for thermocouples
KFD0-TT-Ex1

1-channel, Input EEx ia IIC, Loop powered 12 V DC … 35 V DC, Galvanic isolated measuring circuits, Thermocouple types E, J, K, N, R, S, T, Lead monitoring, Output voltage is linearly proportionate to input voltage, Internal cold junction, Span and zero point adjustable, EMC acc. to NAMUR NE 21, Input: Thermocouple, Rated voltage: 12 … 35 V DC loop powered, Output: 4-20 mA, Output, current sink, Explosion protection: Ex-Input

DC repeater without auxiliary power
KFD0-CS-Ex1.50P

Output EEx ia IIC, Device installation in Zone 2, Polarity reversal protected, Accuracy 0.1 %, EMC acc. to NAMUR NE 21, Rated voltage: loop powered, SIL/IEC 61508, Explosion protection: Ex protection, Field circuit: 4-20 mA, Safe area: 4-20 mA, Transfer direction: to the field

TIB for Voltage
KFD2-PT2-Ex1-4

Explosion protection: Ex input

Transformer isolated barrier for potentiometer
KFD2-PT2-Ex1-5

1-channel, Input EEx ia IIC, 24 V DC nominal supply voltage, Current output 4 mA … 20 mA, Accuracy 0.05 %, EMC acc. to NAMUR NE 21

Voltage repeater
KFD2-VR4-Ex1.26

1-channel, Input EEx ia IIC, 24 V DC supply voltage, Transfer of AC signals possible, 2-wire sensor with current supply, 3-wire sensor with voltage supply, Rated voltage: 20 … 35 V DC, Explosion protection: Ex protection, Field circuit: 0-20 V, Safe area: 0-20 V

Voltage repeater
KFD2-VR-Ex1.500m

1-channel, Input EEx ia IIC, 24 V DC supply voltage, EMC acc. to NAMUR NE 21, Rated voltage: 20 … 35 V DC, Explosion protection: Ex protection, Field circuit: 0-500 mV, Safe area: 0-500 mV, Transfer direction: To the control system

Relay module
KFD0-RSH-1

1-channel, Loop powered, Input non-polarised, Output in fail-safe technology, Relay LED status indication, Up to SIL3 acc. to IEC 61508

Temperature converter
KFD2-UT2-2

2-channel, 1 input/2 outputs freely configurable, 3-way galvanic isolation, Resistance sensors acc. to IEC 751 or GOST 50353-92, Thermocouples acc. to IEC 584-1, GOST 50431-92 or GOST P85.585-2001, 2-wire resistance 0 Omega … 20 kOmega, 3-wire potentiometer 0.8 kOmega … 20 kOmega, Voltage signals between -100 mV and +100 mV, Internal or external cold junction compensation, Sensor burnout and short-circuit monitoring, Collective error message via Power Rail, Input: Temperature

SMART transmitter power supply
KFD2-STV4-1-1

1-channel, 24 V DC supply voltage, SMART capable up to 7.5 kHz (-3 dB), EMC acc. to NAMUR NE 21, Up to SIL2 acc. to IEC 61508, Input: 3-wire transmitter, Rated voltage: 20 … 35 V DC, SIL/IEC 61508, Output signal: 0/1 … 5 V, HART transfer, Input, current source

Power feed module with bus terminals
KFD2-EB2.RPI

24 V DC supply voltage, Device installation in Zone 2, Supply current <= 4 A, Fault signal output with adjustable mode of operation, Bus access via terminals, EMC acc. to NAMUR NE 21

Temperature converter
KFD2-UT2-1

1-channel, 3-way galvanic isolation, Resistance sensors acc. to IEC 751 or GOST 50353-92, Thermocouples acc. to IEC 584-1, GOST 50431-92 or GOST P85.585-2001, 2-wire resistance 0 Omega … 20 kOmega, 3-wire potentiometer 0.8 kOmega … 20 kOmega, Voltage signals between -100 mV and +100 mV, Internal or external cold junction compensation, Sensor burnout and short-circuit monitoring, Collective error message via Power Rail, Online adjustments via serial interface to PC, EMC acc. to EN 61326

Power Rail power feed module for redundant supply, with bus terminals
KFD2-EB2.R4A.RPI

24 V DC supply voltage, Device installation in Zone 2, Supply current <= 4 A, Bus access via terminals, Redundant supply, Fault signal output with adjustable mode of operation, EMC acc. to NAMUR NE 21

Relay Module
KFD0-RSH-1-Y1

1-channel signal conditioner, 24 V DC supply (loop powered), Fail-safe relay contact output, Logic input 16 V DC … 30 V DC, non-polarized, Special version with test pulse suppression for Tricon system from Triconex, Up to SIL3 acc. to IEC 61508

Isolated switch amplifier
KFD2-SRA-Ex4

4-channel, Control circuit Ex ia IIC, 24 V DC supply voltage, Reversible mode of operation, 4 relay outputs, 1 NO contact per channel, grouped into single-pole pairs, 50 % less wiring 2:1, Input: NAMUR sensor, Rated voltage: 19 … 30 V DC, Output: relay, 2:1 Method, Explosion protection: Ex input

SMART repeater
KFD0-SCS-Ex1.55

1-channel, Field circuit EEx ib IIC, Loop powered, Transmission range: 4 mA … 20 mA, Lead monitoring, Suitable for HART communication (galvanically isolated), Universal application for transmitters, position controllers and I/P converters, Only 5 V voltage drop, Test sockets for HART, EMC acc. to NAMUR NE 21, Rated voltage: loop powered, HART transfer, Explosion protection: Ex protection, Field circuit: 4-20 mA, Safe area: 4-20 mA, Transfer direction: to the field

Power Rail power feed module for redundant supply, with bus terminals
KFD2-EB2.R4A.B

24 V DC supply voltage, Device installation permissible in zone 2, Supply current <= 4 A, Bus access via terminals, Redundant supply, Fault signal output with adjustable mode of operation, EMC acc. to NAMUR NE 21

Temperature converter
KFD2-UT2-Ex2-1

2-channel, 1 input/2 outputs freely configurable, 3-way galvanic isolation, Resistance sensors acc. to IEC 751 or GOST 50353-92, Thermocouples acc. to IEC 584-1, GOST 50431-92 or GOST P85.585-2001, 2-wire resistance 0 Omega … 20 kOmega, 3-wire potentiometer 0.8 kOmega … 20 kOmega, Voltage signals between -100 mV and +100 mV, Input: Temperature, Rated voltage: 20 … 30 V DC, Output: 0-5 V, Explosion protection: Ex input

Power feed module
KFD2-EB2

24 V DC supply voltage, Device installation permissible in zone 2, Supply current <= 4 A, Fault signal output with adjustable mode of operation, EMC acc. to NAMUR NE 21

Isolated Repeaters
KFD2-VR-Ex500m.R

Explosion protection: Ex input

Solenoid driver
KFD2-SL2-Ex1.LK

1-channel, Output EEx ia IIC, Lead monitoring: red LED, flashing, signal on Power Rail and output error message de-energised, 24 V DC supply voltage, Output current max. 45 mA, Logic inputs, non-polarised, Removable terminals, EMC acc. to NAMUR NE 21, LED accord. to NAMUR NE 44, Up to SIL2 acc. to IEC 61508, Input: with prelogic, Rated voltage: 20 … 30 V DC, SIL/IEC 61508, Explosion protection: Ex-Output, Fault message output

Isolated Repeaters
KFD2-VR-Ex500m.L

Explosion protection: Ex input

Solenoid driver
KFD2-SL2-Ex2

2-channel, Output Ex ia IIC, Ex ia D , Lead monitoring: LED flashing red and signal via Power Rail, Output current max. 45 mA, Logic inputs, non-polarised, EMC acc. to NAMUR NE 21, LED accord. to NAMUR NE 44, Up to SIL2 acc. to IEC 61508, Input: with prelogic, Rated voltage: 20 … 30 V DC, SIL/IEC 61508, Explosion protection: Ex-Output, Fault message output, Output rated operating current: 45 mA

Solenoid driver
KFD2-SL2-Ex1

1-channel, Output Ex ia IIC, Ex ia D , 24 V DC supply voltage, Output current max. 45 mA, Logic input non-polarised, EMC acc. to NAMUR NE 21, Lead monitoring: LED flashing red and signal via Power Rail, LED accord. to NAMUR NE 44, Up to SIL2 acc. to IEC 61508, Input: with prelogic, Rated voltage: 20 … 30 V DC, SIL/IEC 61508, Explosion protection: Ex-Output, Fault message output, Output rated operating current: 45 mA

SMART repeater
KFD2-SCD2-1.LK

Solenoid driver
KFD2-SL2-Ex1.B

1-channel, Output Ex ia IIC, Ex ia D , 24 V DC supply voltage, Output current max. 45 mA, Logic input non-polarised, EMC acc. to NAMUR NE 21, Up to SIL2 acc. to IEC 61508, Input: with prelogic, Rated voltage: 20 … 30 V DC, SIL/IEC 61508, Explosion protection: Ex-Output, Output rated operating current: 45 mA

SMART repeater
KFD2-SCD2-2.LK

2-channel, Lead breakage (LB) monitoring and short-circuit (SC) monitoring via Power Rail, Suitable for HART communication (galvanically isolated), Accuracy 0.1 %, EMC acc. to NAMUR NE 21, Up to SIL2 acc. to IEC 61508

Temperature converter with trip relays
KFD2-GUT-Ex1.D

1-channel, Input EEx ia IIC, Input for voltage 0 V … 1 V, 0 V … 10 V, -100 mV … +100 mV, Input RTD: Pt100, Pt500, Pt1000, Ni100,Ni1000 2-, 3- and 4-wire, Input potentiometer 800 Ohm … 20 kOhm 2-, 3- and 5-wire, Input thermocouple type B, E, J, K, L, N, R, S, T, Redundant input for thermocouple for plausibility check, Sensor burnout monitoring, 2 relay outputs, Each relay output individually parameterisable as high/low alarm, Analogue output 0/4 mA … 20 mA, Input: Temperature

Solenoid driver
KFD2-SL2-Ex2.B

2-channel, Output Ex ia IIC, Ex ia D , 24 V DC supply voltage, Output current max. 45 mA, Logic inputs, non-polarised, EMC acc. to NAMUR NE 21, LED accord. to NAMUR NE 44, Up to SIL2 acc. to IEC 61508, Input: with prelogic, Rated voltage: 20 … 30 V DC, SIL/IEC 61508, Explosion protection: Ex-Output, Output rated operating current: 45 mA

Solenoid driver
KFD2-SD-Ex1.36

1-channel, Output EEx ia IIB, Device installation in Zone 2, Current limit: 80 mA, Up to SIL3 acc. to IEC 61508, Input: without prelogic, Rated voltage: loop powered, SIL/IEC 61508, Explosion protection: Ex-Output, Output rated operating current: max. 80 mA

Signal converter for resistor
KFD0-RC-Ex1

1-channel, Input EEx ia IIC, Loop powered 12 V DC … 35 V DC, Galvanic isolated measuring circuits, Resistance input, 3-wire connection for lead compensation, Lead breakage monitoring, EMC acc. to NAMUR NE 21, Input: Resistance, Rated voltage: 12 … 35 V DC loop powered, Output: 4-20 mA, Output, current sink, Explosion protection: Ex input

Power Rail power feed module for redundant supply, with bus terminals
KFD2-EB.MAR.RPI

24 V DC supply voltage, Supply current <= 2 A, Bus access via terminals, Redundant supply, Fault signal output with adjustable mode of operation, EMC acc. to NAMUR NE 21, For applications on ships

Transformer isolated barrier for potentiometer
KFD2-PT2-Ex1-4

1-channel, Input EEx ia IIC, 24 V DC nominal supply voltage, Current output 0 mA … 20 mA, Accuracy 0.05 %, EMC acc. to NAMUR NE 21

Voltage repeater
KFD2-VR-Ex1.18

1-channel, Input EEx ia IIC, 24 V DC supply voltage, EMC acc. to NAMUR NE 21, Rated voltage: 20 … 35 V DC, Explosion protection: Ex protection, Field circuit: 0-12 V, Safe area: 0-12 V, Transfer direction: to the control system

Accessories
KFD0-LC-1

Signal converter for Pt100
KFD0-TR-Ex1

1-channel, Input EEx ia IIC, Loop powered 12 V DC … 35 V DC, Galvanic isolated measuring circuits, Input for Pt100 2- or 3-wire, Sensor burnout monitoring, Output, thermally linear, Span can be adjusted from 25 °C … 800 °C, with linearisation from 20 °C … 375 °C, EMC acc. to NAMUR NE 21, Input: Resistance, Rated voltage: 12 … 35 V DC loop powered, Output: 4-20 mA, Output, current sink, Explosion protection: Ex-Input

Isolated switch amplifier
KFD2-SOT2-Ex1.N

1-channel, Control circuit EEx ia IIC, Device installation permissible in zone 2, Reversible mode of operation, Output: signal output (passive electronic output), EMC acc. to NAMUR NE 21, LB/SC collective error message via Power Rail, Signal output NAMUR compatible, Up to SIL2 acc. to IEC 61508, Input: NAMUR sensor, Rated voltage: 20 … 30 V DC, Output: Optocoupler, SIL/IEC 61508, Explosion protection: Ex input

Standstill controller
KFD2-SR2-2.W.SM

1-channel standstill controller, Rotation direction detection or start-up override selectable, 2 relay outputs, Input frequency <= 2 kHz, Diagnosis LEDs for rotation detection, signal below the trip value, operating voltage and hardware error

Current repeater
KFD2-CD2-Ex2

2-channel, Output EEx ia IIC, Device installation permissible in zone 2, Accuracy 0.1 %, EMC acc. to NAMUR NE 21, Up to SIL2 acc. to IEC 61508, Rated voltage: 10 … 35 V DC, Explosion protection: Ex protection, Field circuit: 4-20 mA, Safe area: 4-20 mA, Transfer direction: To the field

Solenoid driver
KFD0-SD2-Ex1.10100

1-channel, Output EEx ia IIC, Up to SIL3 acc. to IEC 61508, Rated voltage: loop powered, SIL/IEC 61508, Explosion protection: Ex-Output, Output rated operating current: 100 mA

Transformer isolated barrier for potentiometer
KFD2-PT2-Ex1-1

1-channel, Input EEx ia IIC, 24 V DC nominal supply voltage, Voltage output 0 V … 5 V, Accuracy 0.05 %, EMC acc. to NAMUR NE 21, Rated voltage: 20 … 35 V DC, Explosion protection: Ex input

HART Multiplexer Slave
KFD0-HMS-16

16-channel, No external power required, HART field device inputs, Used with HART Multiplexer Master KFD2-HMM-16, Up to SIL3 acc. to IEC 61508

Place Holder Barrier
KFD0-LGH-GN

Non-IS K-System place holder module, Housing width 20 mm, Marshalling for field and control side circuits, Jumper configurable

Transmitter power supply
KFD2-CR4-Ex1.2O

1-channel, Device installation permissible in zone 2, Input EEx ia IIC, U o = 25.4 V, 2 galvanically isolated outputs, 24 V DC supply voltage, EMC acc. to NAMUR NE 21, Up to SIL2 acc. to IEC 61508, Input: 3-wire transmitter, Rated voltage: 20 … 35 V DC, SIL/IEC 61508, Output signal: 0/4 … 20 mA, Dual output, Input, current source, Explosion protection: Ex input

SMART transmitter power supplies
KFD2-STC4-Ex2-Y132953

2-channel, Input EEx ia IIC, U o = 25.2 V, Device installation permissible in zone 2, 24 V DC supply voltage, SMART capable up to 7.5 kHz (-3 dB), EMC acc. to NAMUR NE 21, Up to SIL2 acc. to IEC 61508, Input: 2-wire transmitter, Rated voltage: 20 … 35 V DC, SIL/IEC 61508, Output signal: 0/4 … 20 mA (overload > 25mA), HART transfer, Explosion protection: Ex input

SMART transmitter power supplies
KFD2-STC4-2

2-channel, 24 V DC supply voltage, SMART capable up to 7.5 kHz (-3 dB), EMC acc. to NAMUR NE 21, Up to SIL2 acc. to IEC 61508

SMART transmitter power supplies
KFD2-STV4-2-1

2-channel, 24 V DC supply voltage, SMART capable up to 7.5 kHz (-3 dB), EMC acc. to NAMUR NE 21, Up to SIL2 acc. to IEC 61508

Isolated switch amplifier
KFD2-SR2-Ex2.W

2-channel, Control circuit EEx ia IIC, Reversible mode of operation, 1 signal output with 1 changeover contact per channel, EMC acc. to NAMUR NE 21, LB/SC monitoring, LB/SC collective error message via Power Rail, Up to SIL2 acc. to IEC 61508, Input: NAMUR sensor, Rated voltage: 20 … 30 V DC, Output: relay, SIL/IEC 61508, Explosion protection: Ex input

Solenoid drivers
KFD2-VM-Ex1.32.O

Explosion protection: Ex input

Isolated Switch Amplifier
KFD2-SOT2-EX2.IO-Y181008

2-channel, Control circuit EEx ia IIC, Device installation in Zone 2, Reversible mode of operation, One passive electronic output per channel, EMC acc. to NAMUR NE 21, LB/SC monitoring, LB/SC collective error message via Power Rail, Input: NAMUR sensor, Rated voltage: 20 … 30 V DC, Output: Optocoupler, Separate outputs, Explosion protection: Ex input

Isolated switch amplifier
KFD2-SR2-Ex1.W.LB

1-channel, Control circuit EEx ia IIC, Reversible mode of operation, Output I: signal output (changeover contact), Output II: optionally signal output/fault signal, EMC acc. to NAMUR NE 21, LB/SC monitoring, LB/SC collective error message via Power Rail, Up to SIL2 acc. to IEC 61508, Input: NAMUR sensor, Rated voltage: 20 … 30 V DC, Output: relay, SIL/IEC 61508, Explosion protection: Ex input

Isolated switch amplifier
KFD2-SR2-Ex1.W

1-channel, Control circuit EEx ia IIC, Reversible mode of operation, 1 relay output with 1 changeover contact, EMC acc. to NAMUR NE 21, LB/SC monitoring, LB/SC collective error message via Power Rail, Up to SIL2 acc. to IEC 61508, Input: NAMUR sensor, Rated voltage: 20 … 30 V DC, Output: relay, SIL/IEC 61508, Explosion protection: Ex input

Voltage Repeater
KFD2-VR-Ex1.12

1-channel isolated barrier, 24 V DC supply (Power Rail), Voltage input 0 V … 9 V, Voltage output 0 V … 9 V, Rated voltage: 20 … 35 V DC, Explosion protection: Ex protection

SMART transmitter power supplies
KFD2-STC4-Ex2

2-channel, Input EEx ia IIC, U o = 25.2 V, Device installation permissible in zone 2, 24 V DC supply voltage, SMART capable up to 7.5 kHz (-3 dB), EMC acc. to NAMUR NE 21, Up to SIL2 acc. to IEC 61508, Input: 2-wire transmitter, Rated voltage: 20 … 35 V DC, SIL/IEC 61508, Output signal: 0/4 … 20 mA (overload > 25mA), HART transfer, Explosion protection: Ex input

Signal converter for Pt100
KFD0-TR-1

1-channel, Loop powered 12 V DC … 35 V DC, Galvanic isolated measuring circuits, Input for Pt100 2- or 3-wire, Sensor burnout monitoring, Output, thermally linear, Span can be adjusted from 25 °C … 800 °C, with linearisation from 20 °C … 375 °C, EMC acc. to NAMUR NE 21, Input: Resistance, Rated voltage: 12 … 35 V DC loop powered, Output: 4-20 mA, Output, current sink, Explosion protection: No Ex-protection

Solenoid driver
KFD2-VM-Ex1.35

1-channel, 2 logic inputs, Output EEx ib IIC, 24 V DC supply voltage, LED signalling of the switch state, EMC acc. to NAMUR NE 21, Input: with prelogic, Rated voltage: 20 … 30 V DC, Explosion protection: Ex-Output, Output rated operating current: 17 mA

Signal converter for current/voltage
KFD0-CC-1

1-channel, Loop powered 12 V DC … 35 V DC, Galvanic isolated measuring circuits, Current range (0/4 mA … 20 mA) or voltage range (0/1 V … 5 V, 0/2 V … 10 V) adjustable via DIP switch, fine tuning (approx. 1%) of the span and zero point possible via DIP switch, Fine adjustment (approx. 1 %) of the span and of the zero point is possible using a potentiometer, Output: 4 mA … 20 mA, EMC acc. to NAMUR NE 21, Input: Current/voltage, Rated voltage: 12 … 35 V DC loop powered, Output: 4-20 mA

Strain Gauge Converter
KFD2-WAC2-Ex1.D-Y189512

1-channel isolated barrier, 24 V DC supply (Power Rail), Strain gauge input, Output 0 mA … +- 20 mA or 0 V … +- 10 V, Relay contact output, Programmable high/low alarm, RS 485 interface, Low response time, Line fault detection (LFD), Input: DMS bridges, Rated voltage: 20 … 35 V DC, Output: 4-20 mA, Limit alarm relay, Display, Explosion protection: Ex input

HART Loop Converter
KFD2-HLC-Ex1.D.2W

1-channel isolated barrier, 24 V DC supply (Power Rail), Input HART with transmitter supply, 2 relay outputs, 3 analog outputs 4 mA … 20 mA, Parameterization via control panel, Input: 3-wire transmitter, Rated voltage: 19 … 30 V DC, HART transfer, Limit alarm relay, Display, Output, current sink, Input, current source, Explosion protection: Ex input

Standstill controller
KFD2-SR2-Ex2.W.SM

1-channel, Control circuit EEx ia IIC, Additional input for rotation direction detecion or start-up override, 2 relay outputs, Input frequency <= 2 kHz, EMC acc. to NAMUR NE 21, Diagnosis LEDs for rotation detection, signal below the trip value, operating voltage and hardware error, LB/SC monitoring, Collective error message via Power Rail, Up to SIL2 acc. to IEC 61508

Voltage repeater
KFD2-VR2-Ex1.50m

1-channel, Input EEx ia IIC, 24 V DC supply voltage, EMC acc. to NAMUR NE 21, Selectable lead breakage monitoring, Rated voltage: 15 … 30 V DC, Explosion protection: Ex protection, Field circuit: 0-50 mV, Safe area: 0-50 mV, Transfer direction: to the control system

HART Loop Converter
KFD2-HLC-Ex1.D

1-channel isolated barrier, 24 V DC supply (Power Rail), Input HART with transmitter supply, 3 analog outputs 4 mA … 20 mA, Parameterization via control panel, Input: 3-wire transmitter, Rated voltage: 19 … 30 V DC, HART transfer, Display, Output, current sink, Input, current source, Explosion protection: Ex input

Signal converter for thermocouples
KFD0-TT-1

1-channel, Loop powered 12 V DC … 35 V DC, Galvanic isolated measuring circuits, Thermocouple types E, J, K, N, R, S, T, Lead monitoring, Output voltage is linearly proportionate to input voltage, Internal cold junction, Span and zero point adjustable, EMC acc. to NAMUR NE 21, Input: Thermocouple, Rated voltage: 12 … 35 V DC loop powered, Output: 4-20 mA, Output, current sink, Explosion protection: No Ex-protection

Signal converter for current/voltage
KFD0-VC-1.10

1-channel, Loop powered 12 V DC … 35 V DC, Galvanic isolated measuring circuits, Output: 4 mA … 20 mA, Fine tuning for span and zero point, EMC acc. to NAMUR NE 21, Input: Current/voltage, Rated voltage: 12 … 35 V DC loop powered, Output: 4-20 mA, Output, current sink, Explosion protection: No Ex-protection

HART Loop Converter
KFD2-HLC-Ex1.D.4S

1-channel isolated barrier, 24 V DC supply (Power Rail), Input HART with transmitter supply, 4 relay outputs (NO), 3 analog outputs 4 mA … 20 mA, Parameterization via control panel, Input: 3-wire transmitter, Rated voltage: 19 … 30 V, HART transfer, Limit alarm relay, Display, Output, current sink, Input, current source, Explosion protection: Ex input

SMART transmitter power supply
KFD2-STC3-Ex1

1-channel, Input EEx ia IIC, U o = 25.2 V, 24 V DC supply voltage, SMART capable up to 40 kHz (-1dB), EMC acc. to NAMUR NE 21, Input: 2-wire transmitter, Rated voltage: 20 … 35 V DC, Output signal: 4 … 20 mA , max. load 1000 Omega , for HART >= 230 Omega, HART transfer, Explosion protection: Ex input

SMART transmitter power supply
KFD2-STV3-Ex1-2

1-channel, Input EEx ia IIC, U o = 25.2 V, 24 V DC supply voltage, SMART capable up to 40 kHz (-1dB), EMC acc. to NAMUR NE 21, Input: 2-wire transmitter, Rated voltage: 20 … 35 V DC, Output signal: 2 … 10 V , internal resistance approx. 305 Omega, HART transfer, Explosion protection: Ex input

Solenoid driver
KFD2-SL2-Ex1.LK

1-channel, Output EEx ia IIC, Lead monitoring: red LED, flashing, signal on Power Rail and output error message de-energised, 24 V DC supply voltage, Output current max. 45 mA, Logic inputs non-polarized, Removable terminals, EMC acc. to NAMUR NE 21, LED accord. to NAMUR NE 44, Up to SIL2 acc. to IEC 61508, Input: with prelogic, Rated voltage: 20 … 30 V DC, SIL/IEC 61508, Explosion protection: Ex-Output, Fault message output

SMART transmitter power supply
KFD2-STV3-Ex1-1

1-channel, Input EEx ia IIC, U o = 25.2 V, 24 V DC supply voltage, SMART capable up to 40 kHz (-1dB), EMC acc. to NAMUR NE 21, Input: 2-wire transmitter, Rated voltage: 20 … 35 V DC, Output signal: 1 … 5 V , internal resistance approx. 305 Omega, HART transfer, Explosion protection: Ex input

Converter
KFD2-UT-Ex1-1

1-channel, Input EEx ia IIC, 24 V DC supply voltage, Accuracy +- 0.1 %, Adjustment option of temperature measuring range for Pt100, Ni100 in 2-, 3- or 4-wire versions, Adjustment option of thermocouple (B, E, J, K, L, N, R, S or T), Freely definable characteristic curve for resistance 0 Omega … 400 Omega and voltage -50 mV … +150 mV, Internal or external cold junction compensation, Sensor burnout monitoring for thermocouples, Sensor burnout and short-circuit monitoring (SC) for Pt100

SMART Transmitter Power Supply
KFD2-STC4-Ex1

1-channel isolated barrier, 24 V DC supply (Power Rail), 2-wire SMART transmitters or current sources, Output 4 mA … 20 mA, Terminals with test points, Up to SIL2 acc. to IEC 61508, Input: 2-wire transmitter, Rated voltage: 20 … 35 V DC, SIL/IEC 61508, Output signal: 0/4 … 20 mA (overload > 25 mA), HART transfer, Input, current source, Explosion protection: Ex input

DC repeater without auxiliary power
KFD0-CS-Ex2.51P

Output EEx ia IIC, Device installation permissible in zone 2, Polarity reversal protected, Accuracy 1 %, EMC acc. to NAMUR NE 21, Up to SIL2 acc. to IEC 61508, Rated voltage: loop powered, SIL/IEC 61508, Explosion protection: Ex protection, Field circuit: 0-40 mA, Safe area: 0-40 mA, Transfer direction: to the field

DC repeater without auxiliary power
KFD0-CS-Ex2.50P

2-channel, Field circuit EEx ia IIC, Device installation permissible in zone 2, Accuracy 0.1 %, EMC acc. to NAMUR NE 21, Up to SIL2 acc. to IEC 61508, Rated voltage: loop powered, SIL/IEC 61508, Explosion protection: Ex protection, Field circuit: 4-20 mA, Safe area: 4-20 mA, Transfer direction: to the field

SMART transmitter power supplies
KFD2-STC1-Ex1

1-channel, Input EEx ia IIC, U o = 25.5 V, 24 V DC nominal supply voltage, SMART capable up to 12 kHz (-1 dB), EMC acc. to NAMUR NE 21, Input: 2-wire transmitter, Rated voltage: 20 … 35 V DC, Output signal: 4 … 20 mA , max. load 500 Ohm, with HART >= 230 Ohm, HART transfer, Explosion protection: Ex input

Electrode relay
KFD2-ER-1.6

Relay module
KFD0-RO-Ex2

2-channel, Control circuit EEx ia IIC, Outputs for switching intrinsically safe circuits up to 60 V, Device installation permissible in zone 2, Inputs non-polarised, LED status indicator of relays, Input: 24 V DC, Output: relay, Explosion protection: Ex input

Transmitter power supply
KFD2-CR4-1.2O

1-channel, 2 galvanically isolated outputs, 24 V DC supply voltage, EMC acc. to NAMUR NE 21

Electrode relay
KFD2-ER-1.5

HART Multiplexer Master
KFD2-HMM-16

16-channel, 24 V DC supply (Power Rail), HART field device inputs, Up to 15 KFD0-HMS-16 slave units can be connected, Up to SIL3 acc. to IEC 61508

Isolated switch amplifier
KFD2-ST2-Ex1.LB

1-channel, Control circuit EEx ia IIC, Device installation permissible in zone 2, Reversible mode of operation, Output I: signal output (active electronic output) Output II: either signal output or error message (active electronic output), EMC acc. to NAMUR NE 21, LB/SC monitoring, LB/SC collective error message via Power Rail, Up to SIL2 acc. to IEC 61508, Input: NAMUR sensor, Rated voltage: 20 … 30 V DC, Output: Transistor, SIL/IEC 61508, Explosion protection: Ex input

Current/voltage repeater
KFD2-CD-1.32

1-channel, 24 V DC supply voltage, Conversion of current/voltage or voltage/current, Elevation of the ‘life zero’, EMC acc. to NAMUR NE 21, Up to SIL2 acc. to IEC 61508, Rated voltage: 20 … 35 V DC within the supply tolerance, SIL/IEC 61508, Field circuit: 0(4)-20 mA, Safe area: 0(4)-20 mA, Transfer direction: to the field

Trip amplifier
KFD2-GU-1

1-channel, 24 V DC supply voltage, 2 switch outputs, High/low alarm selectable, Mode of operation adjustable, Adjustment option of 0 V … 10 V, 0 mA … 20 mA, of Pt100, Ni100 or thermocouple (B, E, J, K, L, N, R, S or T), Internal or external cold junction compensation, Sensor burnout monitoring for thermocouples, Sensor burnout and short-circuit monitoring for Pt100, current and voltage, Online adjustments via serial interface to PC, EMC acc. to NAMUR NE 21, Rated voltage: 20 … 35 V DC

DC repeater without auxiliary power
KFD0-CS-Ex1.51P

Trip amplifier
KFD2-GU-Ex1

1-channel, Input EEx ia IIC, 2 relay outputs, High/low alarm settable, Mode of operation adjustable, Inputs for voltage (0 V … 10 V), current (0 mA … 20 mA) RTDs (Pt100, Ni100) thermocouples (B, E, J, K, L, N, R, S, or T), Sensor burnout monitoring for thermocouples, Sensor burnout and short-circuit monitoring for Pt100, Online adjustments via serial interface to PC, EMC acc. to NAMUR NE 21, Rated voltage: 19 … 35 V DC, Output: 2 x 1 Changeover contact, Explosion protection: Ex input

Converters
KFD2-FAC-1

Explosion protection: No Ex-protection

Temperature Trip Value
KFD2-GU-1

1-channel signal conditioner, 24 V DC supply (Power Rail), Thermocouple, RTD, voltage or current input, 2 relay contact outputs, Programmable high/low alarm, Configurable by PACTware TM, Sensor burnout detection, Rated voltage: 19 … 35 V DC, Output: 2 x 1 Changeover contact

Transmitter supply isolator
KFD2-CR-Ex1.30300

1-channel, Input EEx ia IIC, U o = 26 V, 24 V DC supply voltage, Output: allowable load max. 1 kOmega, EMC acc. to NAMUR NE 21, Input: 3-wire transmitter, Rated voltage: 20 … 35 V DC, Output signal: 0 … 20 mA, Input, current source, Explosion protection: Ex input

Switch Amplifier
KFD2-SOT2-Ex2

2-channel isolated barrier, 24 V DC supply (Power Rail), Dry contact or NAMUR inputs, Passive transistor output, non-polarized, Line fault detection (LFD), Reversible mode of operation, Up to SIL2 acc. to IEC 61508, Input: NAMUR sensor, Rated voltage: 20 … 30 V DC, Output: Optocoupler, SIL/IEC 61508, Explosion protection: Ex input

Isolated switch amplifier
KFD2-SOT2-Ex2.IO

2-channel, Control circuit EEx ia IIC, Device installation permissible in zone 2, Reversible mode of operation, 1 passive transistor output, depolarized per channel, EMC acc. to NAMUR NE 21, LB/SC monitoring, LB/SC collective error message via Power Rail, Up to SIL2 acc. to IEC 61508, Input: NAMUR sensor, Rated voltage: 20 … 30 V DC, Output: Optocoupler, SIL/IEC 61508, Separate outputs, Explosion protection: Ex input

Isolated switch amplifier
KFD2-SH-Ex1

1-channel, Control circuit EEx ia IIC, Lead breakage (LB) monitoring and short-circuit (SC) monitoring, 1 safety-related relay output SIL3 acc. to IEC/EN 61508 and acc. to DIN VDE 0660, part 209, Product classification in accordance with ISO 13849-1 (EN 954-1 category 3), 1 relay output repeats the state of the input circuit, 1 passive electronic output, error message, EMC acc. to NAMUR NE 21, Up to SIL3 acc. to IEC 61508, Input: NAMUR sensor, Rated voltage: 20 … 35 V DC, Output: relay, SIL/IEC 61508

Repeater
KFD0-CS-Ex1.54

SMART transmitter power supply
KFD2-STC4-1.2O

1-channel, 2 galvanically isolated outputs, 24 V DC supply voltage, EMC acc. to NAMUR NE 21, Up to SIL2 acc. to IEC 61508

SMART transmitter power supply
KFD2-STC4-1

1-channel, Galvanically isolated output, 24 V DC supply voltage, SMART capable up to 7.5 kHz (-3 dB), EMC acc. to NAMUR NE 21, Up to SIL2 acc. to IEC 61508

Isolated switch amplifier
KFD2-SOT2-Ex1.LB.IO

1-channel, Control circuit EEx ia IIC, Device installation permissible in zone 2, Reversible mode of operation, Output I: signal output (passive electronic output, non-polarised) Output II: either signal output or error message (passive electronic output, non-polarised), Output I and Output II galvanically isolated, EMC acc. to NAMUR NE 21, LB/SC monitoring, LB/SC collective error message via Power Rail, Up to SIL2 acc. to IEC 61508, Input: NAMUR sensor, Rated voltage: 20 … 30 V DC, Output: Optocoupler

Isolated switch amplifier
KFD2-SOT2-Ex1.LB

1-channel, Control circuit EEx ia IIC, Device installation permissible in zone 2, Reversible mode of operation, Output I: signal output (passive electronic output, non-polarised) Output II: either signal output or error message (passive electronic output, non-polarised), EMC acc. to NAMUR NE 21, LB/SC monitoring, LB/SC collective error message via Power Rail, Up to SIL2 acc. to IEC 61508, Input: NAMUR sensor, Rated voltage: 20 … 30 V DC, Output: Optocoupler, SIL/IEC 61508, Explosion protection: Ex input

Isolated switch amplifier
KFD2-ST2-Ex2

2-channel, Control circuit EEx ia IIC, Device installation permissible in zone 2, Reversible mode of operation, 1 active electronic output per channel, EMC acc. to NAMUR NE 21, LB/SC monitoring, LB/SC collective error message via Power Rail, Up to SIL2 acc. to IEC 61508, Input: NAMUR sensor, Rated voltage: 20 … 30 V DC, Output: Transistor, SIL/IEC 61508, Explosion protection: Ex input

Place Holder Barrier
KFD0-LGH

IS K-System place holder module, Housing width 20 mm, Marshalling for field and control side circuits, Jumper configurable

SMART repeater
KFD2-SCD-Ex1.LK

1-channel, Output EEx ia IIC, Device installation permissible in zone 2, Lead breakage (LB) monitoring and short-circuit (SC) monitoring, Suitable for HART communication (galvanically isolated), EMC acc. to NAMUR NE 21, Up to SIL2 acc. to IEC 61508, Rated voltage: 20 … 35 V DC, SIL/IEC 61508, HART transfer, Explosion protection: Ex protection, Field circuit: 4-20 mA, HART, Safe area: 4-20 mA, HART, Transfer direction: to the field

SMART repeater
KFD2-SCD2-Ex2.LK

2-channel, Output EEx ia IIC, Lead breakage (LB) monitoring and short-circuit (SC) monitoring via Power Rail, Suitable for HART communication (galvanically isolated), Accuracy 0.1 %, EMC acc. to NAMUR NE 21, Up to SIL2 acc. to IEC 61508, Rated voltage: 10 … 35 V DC, SIL/IEC 61508, HART transfer, Explosion protection: Ex protection, Field circuit: 4-20 mA, HART, Safe area: 4-20 mA, HART, Transfer direction: to the field

Earth fault detection
KFD2-ELD-Ex16

16-channel, Inputs EEx ia IIC, 24 V DC supply voltage, Power supply via Power Rail or via removable terminals, 1 LED per channel as an error indicator, Collective error message output with 1 change-over contact, Reversible mode of operation, Test input, Additional collective error message via Power Rail

Segment Coupler 1
KFD2-BR-1.PA.93

Segment coupler for a non-intrinsically safe PROFIBUS PA segment, PROFIBUS DP, EN 50170/2, RS 485: 93.75 kBit/s, PROFIBUS PA, PROFIBUS EN 50170/2, IEC 61158-2: 31.25 kBit/s, Master independent, Up to 32 PROFIBUS PA participants can be connected to a segment, Supply via PA bus

Segment Coupler 1
KFD2-BR-Ex1.3PA.93

Segment coupler for intrinsically safe PROFIBUS PA segment, PROFIBUS DP, EN 50170/2, RS 485: 93.75 kBit/s, PROFIBUS PA [EEx ia] IIC, PROFIBUS EN 50170/2, IEC 61158-2: 31.25 kBit/s, Master independent, Up to 10 Ex devices can be connected to the PA segment, Supply via PA bus

Voltage Repeater
KFD2-VR4-Ex1.26

1-channel isolated barrier, 24 V DC supply (Power Rail), Voltage input 0 V … -20 V, Vibration sensor inputs, Voltage/current field supply, Voltage output 0 V … -20 V, Rated voltage: 20 … 35 V DC, Explosion protection: Ex protection, Field circuit: 0-20 V, Safe area: 0-20 V

Segment coupler
KFD2-BR-Ex1.3MOD.38

Segment coupler for MODBUS RTU, Segment coupler for intrinsically safe MODBUS RTU segment, MODBUS RTU [EEx ia] IIC IEC 61158-2: 31.25 kBit/s, Master independent, Up to 32 devices can be connected to RS 485 segment, up to 6 devices to the [EEx ia] segment, 24 V DC rated operational voltage, Removable terminals and Power Rail

Temperature converter
KFD2-UT2-Ex1-1

1-channel, 3-way galvanic isolation, Adjustment option of temperature measuring range for Pt100, Ni100 in 2-, 3- or 4-wire versions, Adjustment option of thermocouple (B, E, J, K, L, N, R, S or T), 2-wire resistance 0 Omega … 20 kOmega, 3-wire potentiometer 0.8 kOmega … 20 kOmega, Input: Temperature, Rated voltage: 20 … 30 V DC, Output: 0-5 V, Explosion protection: Ex input

Logic control unit, universal frequency converter
KFD2-UFC-1.D

1-channel, Input frequency 1 mHz … 12 kHz, Analogue output 0/4 mA … 20 mA, Measuring range parameterisable, 2 relay outputs, 1 electronic output, isolated, Each output can be assigned individual parameters, such as a trip value (high/low alarm), serially switched output, pulse divider or error message output, Start-up override, Restart inhibit, Lead breakage (LB) monitoring and short-circuit (SC) monitoring, Bounce filter, Parameterisation via PC or control panel, Up to SIL2 acc. to IEC 61508

Frequency current converter with trip value
KFD2-UFC-Ex1.D

1-channel, Control circuit EEx ia IIC, Input frequency 1 mHz … 5 kHz, Analogue output 0/4 mA … 20 mA, Measuring range parameterisable, 2 relay outputs, 1 electronic output, isolated, Each output can be assigned individual parameters, such as a trip value (high/low alarm), serially switched output, pulse divider or error message output, Start-up override, Restart inhibit, Lead breakage (LB) monitoring and short-circuit (SC) monitoring, Bounce filter, Parameterisation via PC or control panel

Temperature converter
KFD2-UT2-Ex2

2-channel, 1 input/2 outputs freely configurable, 3-way galvanic isolation, Resistance sensors acc. to IEC 751 or GOST 50353-92, Thermocouples acc. to IEC 584-1, GOST 50431-92 or GOST P85.585-2001, 2-wire resistance 0 Omega … 20 kOmega, 3-wire potentiometer 0.8 kOmega … 20 kOmega, Voltage signals between -100 mV and +100 mV, Input: Temperature, Rated voltage: 20 … 30 V DC, Output: 4-20 mA, Explosion protection: Ex input

Frequency current converter with trip value monitoring as well as rotation direction and slip signalling
KFD2-UFT-2.D

2-channel, 2 frequency inputs, 2 control inputs, 2 relay outputs, 2 electronic outputs, isolated, Analogue output 0/4 mA … 20 mA, Lead monitoring (can be deactivated), Parameterisation via PC or control panel, Input frequency 1mHz … 1 kHz (slip monitor function 10 Hz … 1 kHz)

Frequency current converter with trip value monitoring as well as rotation direction and slip signalling
KFD2-UFT-Ex2.D

2-channel, Control circuit EEx ia IIC, 2 frequency inputs, 2 control inputs, 2 relay outputs, 2 electronic outputs, isolated, Analogue output 0/4 mA … 20 mA, Lead monitoring (can be deactivated), Parameterisation via PC or control panel, Input frequency 1mHz … 1 kHz (slip monitor function 10 Hz … 1 kHz), Rated voltage: 20 … 30 V DC, Output: 2 x 1 Changeover contact + 4-20 mA, Explosion protection: Ex input

DC repeater without auxiliary power
KFD0-CS-Ex1.50P

1-channel, Field circuit EEx ia IIC, Device installation permissible in zone 2, Accuracy 0.1 %, EMC acc. to NAMUR NE 21, Up to SIL2 acc. to IEC 61508, Rated voltage: loop powered, SIL/IEC 61508, Explosion protection: Ex protection, Field circuit: 4-20 mA, Safe area: 4-20 mA, Transfer direction: to the field

Solenoid Driver
KFD0-SD2-Ex2.1045

2-channel isolated barrier, 24 V DC supply (loop powered), Current limit 45 mA at 10 V DC, Up to SIL3 acc. to IEC 61508, Rated voltage: loop powered, SIL/IEC 61508, Explosion protection: Ex-Output, Output rated operating current: 45 mA

Transmitter Power Supply
KFD2-CRG2-Ex1.D

1-channel isolated barrier, 24 V DC supply (Power Rail), 2-wire transmitters or current sources, Output 0/4 mA … 20 mA, 2 relay contact outputs, Programmable high/low alarm, Linearisation function (max 20 points), Line fault detection (LFD), Up to SIL2 acc. to IEC 61508, Input: 2-wire transmitter, Rated voltage: 20 … 30 V DC, SIL/IEC 61508, Output signal: 0 … 20 mA or 4 … 20 mA, Limit alarm relay, Display, Input, current source, Explosion protection: Ex input

Transmitter Power Supply
KFD2-CRG2-1.D

1-channel signal conditioner, 24 V DC supply (Power Rail), 2-wire transmitters or current sources, Output 0/4 mA … 20 mA, 2 relay contact outputs, Programmable high/low alarm, Linearisation function (max 20 points), Line fault detection (LFD), Up to SIL2 acc. to IEC 61508, Input: 2-wire transmitter, Rated voltage: 20 … 30 V DC, SIL/IEC 61508, Output signal: 0 … 20 mA or 4 … 20 mA, Limit alarm relay, Display, Input, current source

SMART transmitter power supply
KFD2-STC4-Ex1.2O

1-channel, Device installation permissible in zone 2, Input EEx ia IIC, U o = 25.4 V, 2 galvanically isolated outputs, 24 V DC supply voltage, SMART capable up to 7.5 kHz (-3 dB), EMC acc. to NAMUR NE 21, Up to SIL2 acc. to IEC 61508, Input: 3-wire transmitter, Rated voltage: 20 … 35 V DC, SIL/IEC 61508, Output signal: 0/4 … 20 mA (overload > 25mA), HART transfer, Dual output, Input, current source, Explosion protection: Ex input

Current/voltage trip amplifier
KFD2-GS-1.2W

1-channel, 24 V DC supply voltage, 2 switching points operate on 2 output relays (changeover contacts) or limit value 1 actuates both output relays (DIP switch S1.6 in ON position), Measuring sockets for switching point (limit value) and actual value, High/low alarm settable, Mode of operation adjustable, Hysteresis 0 % … 60 % of measuring range, adjustable, EMC acc. to NAMUR NE 21, Rated voltage: 20 … 30 V DC, Output: 2 x 1 Changeover contact, Explosion protection: No Ex-protection

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Vavle Tutorial

GENERAL

Solenoid valves are used wherever fluid flow has to be controlled automatically. They are being used to an increasing degree in the most varied types of plants and equipment. The variety of different designs which are available enables a valve to be selected to specifically suit the application in question.

CONSTRUCTION

Solenoid valves are control units which, when electrically energized or de-energized, either shut off or allow fluid flow. The actuator takes the form of an electromagnet. When energized, a magnetic field builds up which pulls a plunger or pivoted armature against the action of a spring. When de-energized, the plunger or pivoted armature is returned to its original position by the spring action.

VALVE OPERATION

According to the mode of actuation, a distinction is made between direct-acting valves, internally piloted valves, and externally piloted valves. A further distinguishing feature is the number of port connections or the number of flow paths (”ways”).

DIRECT-ACTING VALVES

With a direct-acting solenoid valve, the seat seal is attached to the solenoid core. In the de-energized condition, a seat orifice is closed, which opens when the valve is energized.

DIRECT-ACTING 2-WAY VALVES

Two-way valves are shut-off valves with one inlet port and one outlet port (Fig. 1). In the de-energized condition, the core spring, assisted by the fluid pressure, holds the valve seal on the valve seat to shut off the flow. When energized, the core and seal are pulled into the solenoid coil and the valve opens. The electro-magnetic force is greater than the combined spring force and the static and dynamic pressure forces of the medium.

DIRECT-ACTING 3-WAY VALVES

Three-way valves have three port connections and two valve seats. One valve seal always remains open and the other closed in the de-energized mode. When the coil is energized, the mode reverses. The 3-way valve shown in Fig. 2 is designed with a plunger type core. Various valve operations can be obtained according to how the fluid medium is connected to the working ports in Fig. 2. The fluid pressure builds up under the valve seat. With the coil de-energized, a conical spring holds the lower core seal tightly against the valve seat and shuts off the fluid flow. Port A is exhausted through R. When the coil is energized the core is pulled in, the valve seat at Port R is sealed off by the spring-loaded upper core seal. The fluid medium now flows from P to A.

Unlike the versions with plunger-type cores, pivoted-armature valves have all port connections in the valve body. An isolating diaphragm ensures that the fluid medium does not come into contact with the coil chamber. Pivoted-armature valves can be used to obtain any 3-way valve operation. The basic design principle is shown in Fig. 3. Pivoted-armature valves are provided with manual override as a standard feature.

INTERNALLY PILOTED SOLENOID VALVES

With direct-acting valves, the static pressure forces increase with increasing orifice diameter which means that the magnetic forces, required to overcome the pressure forces, become correspondingly larger. Internally piloted solenoid valves are therefore employed for switching higher pressures in conjunction with larger orifice sizes; in this case, the differential fluid pressure performs the main work in opening and closing the valve.

INTERNALLY PILOTED 2-WAY VALVES

Internally piloted solenoid valves are fitted with either a 2- or 3-way pilot solenoid valve. A diaphragm or a piston provides the seal for the main valve seat. The operation of such a valve is indicated in Fig. 4. When the pilot valve is closed, the fluid pressure builds up on both sides of the diaphragm via a bleed orifice. As long as there is a pressure differential between the inlet and outlet ports, a shut-off force is available by virtue of the larger effective area on the top of the diaphragm. When the pilot valve is opened, the pressure is relieved from the upper side of the diaphragm. The greater effective net pressure force from below now raises the diaphragm and opens the valve. In general, internally piloted valves require a minimum pressure differential to ensure satisfactory opening and closing. Omega also offers internally piloted valves, designed with a coupled core and diaphragm that operate at zero pressure differential (Fig. 5).

INTERNALLY PILOTED MULTI-WAY SOLENOID VALVES

Internally piloted 4-way solenoid valves are used mainly in hydraulic and pneumatic applications to actuate double-acting cylinders. These valves have four port connections: a pressure inlet P, two cylinder port connections A and B, and one exhaust port connection R. An internally piloted 4/2-way poppet valve is shown in Fig. 6. When de-energized, the pilot valve opens at the connection from the pressure inlet to the pilot channel. Both poppets in the main valve are now pressurized and switch over. Now port connection P is connected to A, and B can exhaust via a second restrictor through R.

EXTERNALLY PILOTED VALVES

With these types an independent pilot medium is used to actuate the valve. Fig. 7 shows a piston-operated angle-seat valve with closure spring. In the unpressurized condition, the valve seat is closed. A 3-way solenoid valve, which can be mounted on the actuator, controls the independent pilot medium. When the solenoid valve is energized, the piston is raised against the action of the spring and the valve opens. A normally-open valve version can be obtained if the spring is placed on the opposite side of the actuator piston. In these cases, the independent pilot medium is connected to the top of the actuator. Double-acting versions controlled by 4/2-way valves do not contain any spring.

MATERIALS

All materials used in the construction of the valves are carefully selected according to the varying types of applications. Body material, seal material, and solenoid material are chosen to optimize functional reliability, fluid compatibility, service life and cost.

BODY MATERIALS

Neutral fluid valve bodies are made of brass and bronze. For fluids with high temperatures, e.g., steam, corrosion-resistant steel is available. In addition, polyamide material s used for economic reasons in various plastic valves.

SOLENOID MATERIALS

All parts of the solenoid actuator which come into contact with the fluid are made of austenitic corrosion-resistant steel. In this way, resistance is guaranteed against corrosive attack by neutral or mildly aggressive media.

SEAL MATERIALS

The particular mechanical, thermal and chemical conditions in an application factors in the selection of the seal material. the standard material for neutral fluids at temperatures up to 194°F is normally Viton. For higher temperatures EPDM and PTFE are employed. The PTFE material is universally resistant to practically all fluids of technical interest.

PRESSURE RATINGS - PRESSURE RANGE

All pressure figures quoted in this section represent gauge pressures. Pressure ratings are quoted in PSI. The valves function reliably within the given pressure ranges. Our figures apply for the range 15% undervoltage to 10% overvoltage. If 3/2-way valves are used in a different operation, the permitted pressure range changes. Further details are contained in our data sheets.

In the case of vacuum operation, care has to be taken to ensure that the vacuum is on the outlet side (A or B) while the higher pressure, i.e. atmospheric pressure, is connected to the inlet port P.

FLOW RATE VALUES

The flow rate through a valve is determined by the nature of the design and by the type of flow. The size of valve required for a particular application is generally established by the Cv rating. This figure is evolved for standardized units and conditions, i.e. flowrate in GPM and using water at a temperature of between 40°F and 86°F at a pressure drop of 1 PSI. Cv ratings for each valve are quoted. A standardized system of flowrate values is also used for pneumatics. In this case the air flow in SCFM upstream and a pressure drop of 15 PSI at a temperature of 68°F.

SOLENOID ACTUATOR

A common feature of all Omega solenoid valves is the epoxy-encapsulated solenoid system. With this system, the whole magnetic circuit-coil, connections, yoke and core guide tube - are incorporated in one compact unit. This results in a high magnetic force being contained within the minimum of space, insuring first class electrical insulation and protection against vibration, as well as external corrosive effects.

COILS

The Omega coils are available in all the commonly used AC and DC voltages. The low power consumption, in particular with the smaller solenoid systems, means that control via solid state circuitry is possible.

The magnetic force available increases as the air gap between the core and plug nut decreases, regardless of whether AC or DC is involved. An AC solenoid system has a larger magnetic force available at a greater stroke than a comparable DC solenoid system. The characteristic stroke vs. force graphs, indicated in Fig. 8, illustrate this relationship.

The current consumption of an AC solenoid is determined by the inductance. With increasing stroke the inductive resistance decreases and causes an increase in current consumption. This means that at the instant of de-energization, the current reaches its maximum value. The opposite situation applies to a DC solenoid where the current consumption is a function only of the resistance of the windings. A time-based comparison of the energization characteristics for AC and DC solenoids is shown in Fig. 9. At the moment of being energized, i.e. when the air gap is at its maximum, solenoid valves draw much higher currents than when the core is completely retracted, i.e., the air gap is closed. This results in a high output and increased pressure range. In DC systems, after switching on the current, flow increases relatively slowly until a constant holding current is reached. These valves are therefore, only able to control lower pressures than AC valves at the same orifice sizes. Higher pressures can only be obtained by reducing the orifice size and, thus, the flow capability.

THERMAL EFFECTS

A certain amount of heat is always generated when a solenoid coil is energized. The standard version of the solenoid valves has relatively low temperature rises. They are designed to reach a maximum temperature rise of 144°F under conditions of continuous operation (100%) and at 10% overvoltage. In addition, a maximum ambient temperature of 130°F is generally permissible. The maximum permissible fluid temperatures are dependent on the particular seal and body materials specified. These figures can be obtained from the technical data.

TIME DEFINITIONS (VDE0580) RESPONSE TIMES

The small volumes and relatively high magnetic forces involved with solenoid valves enable rapid response times to be obtained. Valves with various response times are available for special applications. The response time is defined as the time between application of the switching signal and completion of mechanical opening or closing.

ON PERIOD

The on period is defined as the time between switching the solenoid current on and off.

CYCLE PERIOD

The total time of the energized and de-energized periods is the cycle period. Preferred cycle period: 2, 5, 10 or 30 minutes.

RELATIVE DUTY CYCLE

The relative duty cycle (%) is the percentage ratio of the energized period to the total cycle period. Continuous operation (100% duty cycle) is defined as continuous operation until steady-state temperature is reached.

VALVE OPERATION

The coding for the valve operation always consists of a capital letter. The summary at left details the codes of the various valve operations and indicates the appropriate standard circuit symbols.

VISCOSITY

The technical data is valid for viscosities up to the figure quoted. Higher viscosities are permissible, but in these cases the voltage tolerance range is reduced and the response times are extended.

TEMPERATURE RANGE

Temperature limits for the fluid medium are always detailed. Various factors, e.g. ambient conditions, cycling, speed, voltage tolerance, installation details, etc., can, however, influence the temperature performance. The values quoted herein should, therefore, be used only as a general guide. In cases where operation at extremes of the temperature range are involved, you should seek advice from Omega’s Engineering Department.

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TYCO Valves & Controls

TYCO Valves & Controls Distribution is opening its new branch in Cape Town with a view to provide better support to customers in the Cape Province and growing the already considerable installed base of valves and actuators.

Hannes Oberholzer, who was appointed to run this branch, has considerable experience in the valve industry and has already attended an intensive one week training programme at the Tyco head office in Gauteng.

Tyco Valves & Controls Distribution is a subsidiary of the Tyco International Group. Tyco Flow Control, a business unit of Tyco Engineered Products and Services is the world’s largest manufacturer of valves, actuators, controls and instrumentation for the power generation, oil and gas, petrochemical, pharmaceutical, food and beverage, and marine industries.

Its products are sold worldwide under well-established brands including: Anderson Greenwood, AVID, Biffi, Clarkson, Crosby, Descote, Keystone, KTM, L&M Valve, MCF, Morin, NeoTecha, Rovalve, Vanessa, Varec and Yarway.

Tyco Valves & Controls’ core business is the sales, support and distribution of valves and control products. With the vision to expand the repair, service and test business, Tyco Valves & Controls moved to larger premises in 2003 where it carries out repairs and refurbishments on most of the valves sold into the South African market. It services the following markets: mining, food and beverage, pulp and paper, power, iron and steel, petrochemical and heat, ventilation and cooling.

Tyco Valves & Control’s product range includes: ball, butterfly knifegate, gate, globe, check, zero leakage rotary process, safety relief valves as well as speciality valves for steam and power, actuators and positioners and process instruments.

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FOUNDATION(TM) fieldbus

Emerson Process Management has been selected by the Zhejiang Changxing Glass Co., Ltd. and the Zhejiang Pinghu Glass Co., Ltd. to engineer and install PlantWeb® digital architecture with DeltaV automation systems and Emerson’s intelligent field devices in new glass plants in the Zhejiang Province. The projects will be the first for plantwide use of FOUNDATION(TM) fieldbus in China’s glass industry.

A core component of PlantWeb architecture, Emerson’s DeltaV(TM) digital automation systems will power the Smart Plant operation with the most advanced automation technology in the glass industry. In addition to installation savings, the PlantWeb architecture with FOUNDATION fieldbus is expected to improve product output and quality through digital reliability and functionality, highly accurate measurements, and advanced diagnostics from the intelligent field devices.

Zhejiang Changxing Glass is investing RMB800 million ($115 million USD) in its new plant, which went into operation in March, 2008. This plant has a designed capacity of 450 tons per day of float glass to meet the rising demand for building materials created by China’s ongoing construction boom. The Zhejiang Pinghu plant is expected to produce 500 tons of ultra-thin glass per day, starting in June 2008, from a total investment of RMB600 ($86 million USD). Ultra-thin glass is used for LEDs and other electronics applications

“Emerson was chosen as our main instrument supplier to take advantage of its advanced fieldbus technology, high quality products, and the excellent integration capabilities of Emerson’s technical personnel,” according to Zhejiang Changxing Project Manager Yang Kuang. “In addition to project and commissioning advantages, we expect digital automation to give us sustained operations and maintenance advantages.”

In addition to the DeltaV automation systems for each plant, Emerson is supplying smart Rosemount® temperature and pressure transmitters, Fisher® control valves equipped with FIELDVUE® digital valve controllers, and its AMS® Suite predictive maintenance software.

Diagnostic data produced by the smart field instruments is accessed over the fieldbus networks by AMS Device Manager which maintains a complete device database, processes acquired information, presents it in graphical format for use by both maintenance and operating personnel, and automatically documents interaction with field devices. This software will be useful during instrument commissioning. Using it as a means of communicating with the field instruments, technicians will spend as much as two-thirds less time for commissioning than with time-consuming conventional procedures. Beyond commissioning, AMS Device Manager’s predictive diagnostics will improve plant availability and performance.

“We are pleased that our advanced technologies, excellent engineering and integration capabilities in China, and reputation for post-sales support enabled our selection to participate in these landmark projects,” commented Mike Train, president of Emerson Process Management Asia Pacific. “We are committed to delivering the same process manufacturing advantages to these customers as we have done in our many installations in China.”

About Emerson Process Management Emerson Process Management (www.emersonprocess.com), an Emerson business, is a leader in helping businesses automate their production, processing and distribution in the chemical, oil and gas, refining, pulp and paper, power, water and wastewater treatment, mining and metals, food and beverage, pharmaceutical and other industries. The company combines superior products and technology with industry-specific engineering, consulting, project management and maintenance services. Its brands include PlantWeb®, DeltaV(TM), Fisher®, Micro Motion®, Rosemount®, Mobrey®, Bristol®, Daniel®, Ovation®, and AMS® Suite.

About Emerson Emerson (NYSE: EMR), based in St. Louis, is a global leader in bringing technology and engineering together to provide innovative solutions to customers through its network power, process management, industrial automation, climate technologies, and appliance and tools businesses.. For more information, visit www.Emerson.com.

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Valve SIL 3 certification

Emerson Process Management has received SIL 3 certification of several ranges of its Fisher valves to IEC 61508 standards. Emerson is the first control valve manufacturer to have achieved this independent third party certification which eliminates the need for prior use methodology while proving that Emerson’s design process, engineering and testing fully comply with IEC 61508. This certification enables users to boost plant availability and safety by using the technology-leading Fisher GX, Vee-ball, easy-e and HP valves in Safety Instrumented Systems in up to SIL 3 loops, per IEC 61508.

The four control valve ranges have been certified by independent third party safety professionals EXIDA for on/off operation within a SIL 3 safety instrumented function. The valves can be packaged with the already successful SIL 3 certified Fisher FIELDVUE DVC6000 SIS digital valve controller that enhances the safety function and monitors the health of the entire final control assembly, a core component of Emerson’s smart SIS complete safety loop offering.

Many process plants already rely on Fisher control valves from Emerson for reliable and consistent performance in process control. The extensive experience of end-users with Fisher valves bear testimony to their quality and reliability in general service applications as well as in more demanding severe service applications. This is important because, when designing SIS functions, choosing the right control valve is the first pre-requisite. Only Fisher control valves offer the combined benefits of proven process control excellence and safety-certification to IEC 61508.

Fisher valves are components of Emerson’s smart SIS safety management solution, an extension of the company’s PlantWeb digital plant architecture. Emerson’s smart SIS provides an integrated approach to complete safety loops — from sensor to logic solver to final control element. The smart SIS solution enables customers to implement safer facilities, improve availability, lower life-cycle costs, and ease regulatory compliance. The smart SIS system components include the Fisher certified valves or SIL-PAC final control solution with FIELDVUE DVC6000 SIS, plus Rosemount and Micro Motion certified and proven-in-use devices, the DeltaV SIS system, and the AMS Suite: Intelligent Device Manager.

About Emerson Process Management
Emerson Process Management, an Emerson business, is a leader in helping businesses automate their production, processing and distribution in the chemical, oil and gas, refining, pulp and paper, power, water and wastewater treatment, metals and mining, food and beverage, pharmaceutical and other industries. A division of Emerson, Fisher Controls International LLC is a global leader in the design, manufacture and application of final control systems. Fisher technology and innovation in process control plays a key role in the Emerson mission of combining superior products and technology with industry-specific engineering, consulting, project management and maintenance services. Emerson brands include PlantWeb, Fisher, Micro Motion, Rosemount, Daniel, Bristol, DeltaV(TM), Ovation, and AMS Suite.

About Emerson
Emerson, based in St. Louis, is a global leader in bringing technology and engineering together to provide innovative solutions to customers through its network power, process management, industrial automation, climate technologies, and appliance and tools businesses.

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New smart valve

Model-Based Design Cuts Development Time by More than 50%

MathWorks has announced that HUSCO International, a global leader in the development and manufacture of hydraulic and electrohydraulic controls, used MathWorks products to create a sophisticated “smart” valve for a 20-ton excavator using Intelligent Control Valve (INCOVA) technology.

Using Model-Based Design and MathWorks products, such as Simulink, Real-Time Workshop, and xPC Target, enabled HUSCO engineers to design and develop the control system for a new valve in less than three months, 50 percent faster than prior designs.

With Simulink, HUSCO engineers were able to develop a robust control system design that can be integrated with a broad range of valve applications, each having different numbers of cylinders. Using Real-Time Workshop to generate code from the Simulink model, HUSCO engineers were able to implement engineering design changes within an hour, roughly eight times faster than previous projects. As a result, HUSCO is able to fully leverage their investment in the design on future projects.

“By electronically controlling the valves with our INCOVA technology, we increase excavator efficiency by a number of measures,” said Darren Hartman, software team leader at HUSCO International. “The control, however, requires optimization and debugging, which is not safe on a live excavator. By working in Simulink, we could model and simulate the design, make adjustments to optimize performance, and generate production code—all from our desks.”

“Model-Based Design enables engineers to develop, implement, and verify their software designs in a single environment through the use of graphical models for the algorithms and production code generation,” said Jon Friedman, automotive industry marketing manager at The MathWorks. “Engineering trade studies can be easily conducted by synthesizing and analyzing many different model topologies before implementing the best design. Additionally, the same models can be used to verify that an engineering change achieves the desired result in a single deployed environment. This reuse simplifies the design process and enables faster iteration cycles.”

For the INCOVA project, over 20 HUSCO engineers in three countries collaborated and communicated effectively through the adoption of Model-Based Design. “In the past, our systems engineers had to consider hardware details, such as the number of bits of accuracy, and worry about communicating the design to the software engineer. With MathWorks tools for Model-Based Design, the system engineer can focus on controls, not on the details of the target hardware,” said Hartman.

About HUSCO

HUSCO is a privately owned manufacturer that provides motion control components and systems to the off highway and automotive markets. HUSCO employs more than 1,000 employees globally, of which approximately 700 are located in Wisconsin.

For more information, please visit www.huscointl.com.

About The MathWorks

The MathWorks is the world’s leading developer of technical computing and Model-Based Design software for engineers and scientists in industry, government, and education. With an extensive product set based on MATLAB and Simulink, The MathWorks provides software and services to solve challenging problems and accelerate innovation in automotive, aerospace, communications, financial services, biotechnology, electronics, instrumentation, process, and other industries.

About Cranes Software International Limited:

Cranes Software International Limited, sole distributor for The MathWorks in India and SriLanka, is a global scientific & engineering solutions provider offering its customers products, consulting and training.

The Company has its presence in 39 countries across the world and has a customer base of more than 350,000. Cranes Software is the Sole Authorized Distributor (since 1993) to The MathWorks, for their MATLAB® & Simulink® products in India and Sri Lanka

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Valve

A single action cylinder produces a single power and exhaust stroke per full revolution of the crank. It begins to allow steam entrance to the upper portion of the cylinder as soon as the piston has reached a degree or two past top dead center in the direction that the engine has been timed to run. As the high pressure steam rushes into the top of the cylinder, it begins to expand a great deal, though not with the explosive bang developed in internal combustion engines. As the steam continues to enter, it continues to expand because it was first under a great deal of pressure inside the boiler. The piston is pushed down, directly by the effect of this pressure to the very bottom portion of the power stroke and begins to return, this time exhausting the spent steam out the same port it first entered powered only by the momentum developed during the power stroke. A heavy, dynamically balanced flywheel smoothes out and tends to balance out the higher velocity of the power stroke and with help of it’s own momentum, to complete the exhaust stroke. As soon as the piston has reached top dead center again it repeats the same cycle again. You can easily see that a single cylinder operating in this manner without the impetus provided by the properly designed flywheel would cause the engine to operate extremely erratic, rotating in alternating fast and slow speeds, possibly even stopping before completing the exhaust cycle. The timing of the steam, that is, the positioning of the valve to allow steam to enter and leave the cylinder at just the right times during both the power and exhaust is the one and only function of the slide valve. On single action engines there is usually a single port located and entering the top of the cylinder right into its bore. This single cylinder port will double as an intake and exhaust port, unlike the image of an engine with intake and exhaust valves opening and closing independently, it is actually a very simple system. Steam engines are timed by a sliding valve passing by a single or pair of cylinder ports, exposing and covering them at just the right time to allow the cycles to take place. On single action engines, we tend to use a cylindrical slide valve as opposed to a rectangular one. The cylindrical valve glides inside a reamed matching diameter bore. Two common features of a single action slide valve is a steam intake slot or hole as well as an exhaust slot or flat on the upper end facing the cylinder. Picture a 1/4″ diameter valve with a 1/4″ long flat on the top end. The flat begins from the tip of the valve and is usually about 1/3 the diameter of the valve deep. The next feature is a 1/8″ wide unmachined space followed by a 1/8″ groove about 1/16″ deep that goes around the circumference of the valve. Some builders drill a hole instead of a groove. Either way, what we have is a vertical step or flat followed by a full section of valve, ending with a circular slot or transverse, centered hole. The single horizontally located port entering into the cylinder bore coincides with the port on the valve bore when it is at the top of the valve stroke. As the piston reaches top dead center, it needs to have air or steam begin to rush in so it is pushed or displaced down on the power half of the cycle. The valve, linked to a rod which is also linked to an eccentric disk is adjusted to time the position of the valve as it is sliding into the bore, bringing the edge of the circular intake slot in line with the bottom edge of the cylinder’s port when the piston is at the top of its stroke. Air or steam can then pass around the circular slot on the valve and enter through the cylinder port to power the piston. As the piston is pressed down, the slide valve is fully exposes the port and immediately begins to slid back down to cover it. At a point prior to bottom dead center the valve will be between the circular slot (intake) and the upper step (exhaust) as it relates to the cylinder port, effectively sealing itself so nothing can get in or out of the cylinder bore. The flywheel will continue turning to bring the piston back up to exhaust the cylinder contents. In order allow the gases to be exhausted the valve continues to slide down so the flat begins to expose the cylinder port this timing has to be just right so as soon as the piston starts moving up, the cylinder port has to begin to be exposed. As the piston goes further up the valve will have slid all the way down, fully exposing the port and allowing the contents to be exhausted around the step and out the top end of the valve. The cycle begins once again with the valve sliding up to allow the circular slot to expose the cylinder port.

A double action cylinder needs a much more intricate network of internal porting to be able to operate. Let me take you through a full cycle of operation beginning with the piston at bottom dead center. Since steam can enter through the bottom as well as the top ends of the cylinder, the bottom portion of the piston rod passes through a seal that prevents any loss of pressure through the normally open end of the cylinder. A centrally located rectangular slide valve inside the valve chest slides toward the top to allow steam to enter through the now exposed bottom port of the cylinder. At the same time, it begins to expose a central exhaust port so as the piston is pushed up from the bottom end, the piston can exhaust through the top end. As it reaches the top of the stroke, the valve slides back down to expose the upper intake port and the piston is then pushed back down, exhausting the bottom end of the cylinder. As you can see, you get twice the amount of power per full 380 degree cycle as compared to a single action cylinder. In fact, this is the way locomotive and other large steam power plants have been traditionally designed. The only problem is that building double action engines in the traditional manner involves some rather intricate machining of cylinder porting as well as a valve chest, valve chest cover and valve unit composed of several parts. No problem for an advanced, experienced home shop machinist but maybe a bit too much of a challenge to someone just starting out in the craft.

After having stared for many hours at single and double cylinder, single action engines, it just came to me that all you would have to do is to build a simple cylindrical slide valve who’s bottom end is a mirror image of the top end. The cylinder’s single top port now would also be mirrored at the bottom. Imagine if you would, two identical pair of valves and cylinders and you sliced them both into two equal sized halves, discarding the bottom ends and splicing the two tops together at their sliced ends to form a perfectly symmetrical valve and cylinder. This whole concept or theory has now been proven and put into practice by me and all I can say is that it work like a charm allowing it to be throttled down to around 40-50 RPM with perfect smoothness. The beauty of a double action engines is the smoothness the system imparts to the rotational cycles. Better yet, I develops twice the power since every time the piston moves, no matter in which direction, it’s always under power. So you can effectively get the same power output out a single cylinder engine as out of a double cylinder but single action engine of the same cylinder displacement.

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Archive for the ‘Control Valve’

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New smart valve

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