For DIN rail mounting Low switching noise, no power consumption in standby. Control with 8 - 230 V/UC, additional control inputs for central on and central off with 8 - 230 V/UC (galvanically separated). Glow lamp current max. 50 mA starting from 100 V-control voltage (possible only in case of certain functions). Switching power max. 20 A/230 V via both the contacts. The following functions can be selected by means of a rotary knob: Central ON and OFF · Only central ON · Only central OFF · No central control. With a second rotary knob the priorities can be selected as well as defined, how the surge current switch behaves in case of failure/return of operating voltage.