The ZP752-2 is a loop wired interface providing two conventional alarm circuits. It can be programmed to operate from a single address, a group or zone of devices or as a common output, from any trigger device connected to the system. The ZP752-2 monitors its power supply and failure of mains, battery or loss of the 24 volt DC output is reported to the main control panel automatically. A red LED indicator is illuminated, on the front of the unit to confirm operation.