The micro-processed controller ST502-KX1TA.12 is used for the thermostatic temperature control of simple refrigerating plants. It is supplied with 230V AC and has an exit relays and an output for AC fan.
The relays can be used for different functions, e.g. for a compressor, a fan, a defroster, an alarm relay, etc. The resistance sensor seizes the refrigerating chamber temperature.
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