automatic sensors and also two independent lines. The third is preferably designed for manual tripping. UE-03 is compatible both in two-wire and four-wire technology with all Brandtronik sensors and with a large number of third-party manufacturers. The device has relay outputs for malfunction, pre-alarm, alarm and system-off and two monitored outputs for warning and extinguishing. The control elements and an LED status display are located on the front plate.