Impulse switch with potential free contacts, also for central control. Standby loss 0.03–0.4 watt only. Central control priorities selectable. State-of-the-art hybrid technology combines advantages of nonwearing electronic control with high capacity of special relays. In addition control inputs 8 to 230V UC central ON and central OFF, electrically isolated from the local input. Supply voltage same as the local control voltage. Very low switching noise. Glow lamp current starting at 110V control voltage up to 50mA in positions 1 to 3 and 5 to 7 of the rotary switch. By using a bistable relay coil power loss and heating is avoided even in the on mode. The switched consumer may not be connected to the mains before the short automatic synchronisation after installation has terminated. Maximum current across both contacts 16A for 230V. Contact position indication with LED. This starts blinking after 15 seconds in case of an inhibited pushbutton, not in position 4+8 of the rotary switch. With the upper rotary switch this impulse switch can be partly or completely excluded from central control.