D125B Powered loop interface. The module provides 2 Class B powered loops for connecting 12 or 24 VDC, two- or four+wire fire or burglary devices or up to 50 two+wire 12 VDC glass break detectors. It reports individual loop alarm or trouble and ground fault; and allows latching device reset from panel or central station.
The D125B has two separate NFPA Class B powered loops. The module supervises each of the loops for opens, shorts, or ground faults. Both loops can be powered with either 12 VDC or 24 VDC to connect compatible two-wire detectors or other two- or fourwire devices such as retarded waterflow switches, manual stations, heat detectors, or glass break detectors.
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 Supervision
The 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-o(more...)
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