The D125B is suitable for connecting fire or burglary devices in commercial, industrial, and institutional applications. Schools, offices, and health care facilities are typical commercial applications.Loop SupervisionThe D125B needs to be electrically connected to earth ground and to the control panel's common. The D125B has a supervisory output terminal for each of its loops. All terminal designations are clearly marked on the module circuit board.To supervise the loops, install an end-of-line (EOL) resistor beyond the last detector of each protective loop. If you are installing a D125B in a new system or are adding additional devices to an existing system, use the 1.8 k? resistor (P/N: F01U009011) supplied with the module.
