l Function in the interactive and AnalogPLUS/SynoLOOP fire detection system – Address assignment during commissioning via the key on the electronics unit. – Correct addressing is indicated by the flashing of the LED. – The key and LED are only accessible or visible when the housing is open. l Application in the collective/SynoLINE600 fire detection system – For galvanic isolation (detection line coupler) between control unit and e.g. shunt Zener diode barrier SB3 with fire detectors for explosion-hazard areas. l Application in the interactive and AnalogPLUS/SynoLOOP fire detection system – For the connection of fire detectors with collective/SynoLINE600 address (special detectors or via shunt Zener diode barriers, detectors for explosion-hazard areas) or for the activation of alarm devices. – For connection on the line direct as a bus user.