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' � � • . . . .,, y . . w < . Frn. ...,.. . �. �� .. '='� . �� it�venfied fQr lif� D125B Dual Class B Initiating Module ► Two separate powered detector loops ► Suitable for 12 VDC or 24 VDC,two-wire smoke ""' '"" vosa detectors o�zes ��° �y�; ► Suitable for four-wire smoke detectors �� II ► U to 50 two-wire 12 VDC lass break detectors �� p g ► Reports individual loop alarm,individual loop trouble, and ground fault ► Manually resets latching devices from control panel ► Remote central station reset The D125B has two separate NFPA Class B (Style B) To supervise the loops, install an end-of-line (EOL) powered loops The module supervises each of the loops resistor beyond the last detector of each protective loop for opens, shorts, or ground faults. Both loops can be If you are replacing a D125 or D125A Module with the powered with either 12 VDC or 24 VDC to connect D125B,use the 1.5 kf] resistor(P/N: 15-03130-000) compatible two-wire detectors or other two-or four-wire installed with the original system If you are installing a devices such as retarded waterflow switches, manual D1256 in a new system or are adding additional devices stations, heat detectors, or glass break detectors. to an existing system, use the 1.8 kfl resistor(P/ The D125B is suitable for connecting fire or burglary N: FO1U009011) supplied with the module. devices in commercial, industrial, and institutional The D125B shorts the protective loop on the control panel applications. Schools, offices,and health care facilities when the high (+) and low (-) side of either module(oop is are typical commercial applications shorted together or when a smoke detector activates.The D125B opens the protective loop on the control panel during the following conditions: Functions • Either of the module protective loops are opened. Loop Supervision • The D125B Interface module is unpowered • Either the high (+) side of the loop or the low (-) side The D125B needs to be electrically connected to earth of the loop is shorted to ground ground and to the contro) panel's common The D1256 With the D9412GV3, D7412GV3, D7212GV3, D9412GV2, has a supervisory output terminal for each of its loops. All D7412GV2, D7212GV2, D9412G, D7412G, and D7212G terminal designations are clearly marked on the module Control Panels,a short to ground causes a ground fault circuit board condition when ground fault detect is enabled When programming for fire applications, refer to the appropriate control panel's operation and installation guide. Warning Do not mix 12 VDC and 24 VDC detectors on the same D1256 Module. www.boschsecurity.com