For flush and surface mounting no power consumption in standby control with 8 230 vuc the following functions can be selected by means of a rotary switch surge current switch or switching relay 2 closer surge current switch or switching relay 1 closer1 opener series switch 1 1 closer switching sequence 1 switching relay idling current relay 2 opener series switch 1 1 closer switching sequence 2 switch on wiping relay 1 closer1 opener wiping time 1 s group switch or gr