Würth FKP002B User manual

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Product information
FKP002B_PI_2013-07_EN Subject to technical modifications Page 1 of 4
FKP002B
Field module for cold locations with relay and semiconductor outputs for EEV
Features
Operation of electronic expansion valves:
- Constant via output 0...10V
- Direct operation of an electronic expansion valve 230V~, pulsed
- Operation of an electronic expansion valve 230V=, pulsed only via driver ATV230
Regulation of one evaporator per module
Connection of an external display
Fixed input/output allocation for probes, control inputs and relays
Emergency program in case of bus errors
Differentiation of probes that have not been used and defective probes
Intelligent determination of product temperature by means of the connected probes
No parameters need to be set on the device

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Product information
Page 2 of 4 Subject to technical changes FKP002B_2013-07_EN
Writing conventions
Symbol Meaning
CAUTION! Avoid the described hazard: Otherwise minor or medium bodily injury will result.
WARNING! Avoid the described hazard: Otherwise there is danger from electric voltage that
can lead to death or serious bodily injury.
For your safety
For safe operation and to avoid personal injury and equipment damage through operational error,
always read these instructions, become familiar with the device, and implement all of the safety
instructions on the product and in these instructions as well as the safety guidelines of Wurm GmbH &
Co. KG Elektronische Systeme. Keep these instructions ready to hand for quick reference and pass
them on with the device when the product is sold.
Wurm GmbH & Co. KG Elektronische Systeme accepts no liability in case of improper use or use for
other than the intended purpose.
Target group These instructions are intended for "service technician" personnel.
Intended purpose The FKP002B is a field module for cold locations with relay and
semiconductor outputs for electronic expansion valves.
WARNING!
Danger of death from electric shock!
Switch off the power to the entire system when installing, wiring or removing! Otherwise,
external voltage can be present even when control voltage is shut off!
The wiring of the device should be carried out only by a qualified electrician!
Use only the correct tools for all work!
Check all wiring after connection!
Never expose the device to moisture, for example due to condensation or cleaning
agents!
Take the device out of operation if it is faulty or damaged and is therefore compromising
safe operation!
CAUTION!
Danger of fire if there is overloading of the relay contacts!
Observe the maximum loads for all relay contacts and semiconductr outputs.
Faults are caused by electromagnetic interference!
Use only shielded data lines and place them far away from power lines!
Damage to device if handled incorrectly!
Do not open the device.
Do not repair the device yourself! If required, send it in for repair with an exact
description of the fault!
Software revisions and validity of documentation
Software version Functional upgrade Page
V1.0 2009-03 Basis of documentation
V2.2 2011-12 Changes to the wiring diagram
2013-07 Technical data
Any software versions not listed are special solutions for individual projects and are not documented in detail in this description.
This document automatically ceases to be valid if a new technical description is issued. Manufacturer: Wurm GmbH & Co. KG
Elektronische Systeme. For further information, see our website at www.wurm.de

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Circuit diagram
Mounting
The device is designed for profile rail mounting. The housing
is a standard size and is also suitable for installation in fuse
boxes, distribution switch boxes or electric boxes of
refrigerators.
The devices can be assembled side-by-side without
clearance.
Fig. 1: Dimensions
First, place the upper guide edge of the module on the top-
hat rail.
Then press it gently downward until it engages with the
mounting safety catch on the rail.
Fig. 2: Mounting on top hat rail

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Product information
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Technical data
Characteristic Data
Supply voltage 230 V~, +10%/-15%, approx. 6VA
Displays 1 x green light-emitting diode, operating voltage
2 x green light-emitting diodes, CAN bus data traffic CAN Tx, CAN Rx
1 x red light-emitting diode, flashing in case of fault
Communication 3-wire CAN-bus interface with integrated
power supply, electrically isolated
Temperature sensor 4 x TRK277, Standard connection:
Supply air, return air, defrost limit, suction gas
Analogue input 4...20mA or 0...10V=
Digital inputs 24V=, +20%/-10%, approx.5mA per input, optocoupler
1 x cold location off, 1 x 2nd setpoint, 1 x cold room door open
Cooling/valve output
Semiconductor relay 1 x 230V~, 4VA...60VA, observe minimum output. Internal feed
Residual voltage measurable! Integrated semiconductor
protection (no isolator)
Output relays 1x fan, opening contact, 230V~, 4(2)A
1 x defrost, closing contact, 230V~, 4(2)A
Connection display 1 x socket for prefabricated line for display DSP002
Analogue output 1 x 0...10V=, tied to potential, capable of bearing max. 10mA
For constant valves
Outlet PWM / EEV 1 x 0...10V=, tied to potential, capable of bearing max. 10mA
for electronic relays ATV230 for controlling of EEV
Enclosure dimensions (WxHxD) 106 x 90 x 58mm, DIN 43880
Mounting Mounting rail DIN EN 50022 35x15
Ambient temperature 0...+50°C operation / 25...+70°C storage
Weight About 395g
CE conformity EC conformity according to
- 2004/108/EC (EMC Directive)
- 2006/95/EC (Low Voltage Directive)
RoHS
Valid from Version 2.1