ECKELMANN Case Controller UA 4 E Series, Operating Instruction

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Firmware V3.13 21.04.2021 41/466
5.7.2.2 Enable relays for motor expansion valves
Only UA 410 E AC
This function is used to control continuous motor expansion valves via the analogue outputs 0..10 V (terminals
29/30 (AO1) and terminals 31/32 (AO2)).
If the motor expansion valves used require wiring of their enable input, or if an additional solenoid valve should
be used for shutdown for safety reasons, the two semiconductor relays EEV1 and EEV2 (terminals 23/24 and
33/34) can be used for this. Furthermore, the enable relays can support the implementation of standalone
operation with compressor control on the refrigeration point side.
Example: Enable relay in single-zone operation
For details, see Terminal assignment of the 0..10 V analogue outputs and Terminal assignment of the 230 V AC
relay outputs .