Document Part # 026-4283 Rev 0 Page 2 of 8
©2022 Emerson Digital Cold Chain, Inc. This document may be photocopied for personal use.
Visit our website at www.climate.emerson.com for the latest technical documentation and updates.
1 General Warnings
PLEASE READ BEFORE USING THIS MANUAL
SAFETY PRECAUTIONS
2 General Description
XEV20D is a stepper valve actuator intended either for bipolar stepper valves or unipolar stepper valves. This
device has been used with ISaGRAF® environment and with programmable devices of iPRO series or in
combination with instruments of i-CHILL 200CX series.
The maximum configuration of hardware is equipped with:
• 2 configurable valve outputs to drive bipolar or unipolar valves
• Pb1/Pb2 configurable analog inputs: NTC/PTC/Pt1000
• Pb3/Pb4 configurable analog inputs: 4 to20mA/0 to5V/Pt1000
• CanBus serial line
• LAN to communicate with instrument of the same series or devices of i-CHILL200CX series
• This manual is part of the product and should be kept near the instrument for easy and quick
reference.
• The instrument shall not be used for purposes different from those described hereunder. It
cannot be used as a safety device.
• Check the application limits before proceeding.
• Check if the supply voltage is correct before connecting the instrument.
• Do not expose to water or moisture: use the controller only within the operating limits avoiding
sudden temperature changes with high atmospheric humidity to prevent formation of
condensation.
• Warning: Disconnect all electrical connections before any kind of maintenance.
• Fit the probe where it is not accessible by the end user. The instrument must not be opened.
• In case of failure or faulty operation send the instrument back to the distributor or to
“Dixell S.p.A.” with a detailed description of the fault.
• Consider the maximum current which can be applied to each relay (see Technical Data).
• Ensure that the wires for probes, loads and the power supply are separated and far enough from
each other, without crossing or intertwining.
• In case of applications in industrial environments, the use of mains filters (our mod. FT1) in
parallel with inductive loads could be useful.
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