Electronic controllers for ventilated refrigeration units. 3 inlets for temperature probes. The EWDR 983 relay has 2 outputs whilst the EWDR 985 has 4. 12 V - 20 mA sensor supply output Used to control defrosting cycles, compressors, etc. Selection of lighting point, 3-digit display, 1/2, + sign. Different types of alarm can be programmed. Surface or DIN rail mounting.
