The extinguishing output can be deactivated. This process is displayed via an LED on the front plate, exactly as for operation, sensor malfunction, extinguishing output malfunction, alarm and extinguishing. The reset button for resetting the device and sensor is also located here. All external components can be connected via pluggable spring clips. The external power supply SV-01.S has a wide input range to permit power supply over the range of 90-264 V~/24 VDC/ 230 mA. The housing can be mounted on a standard rail with no problem.