The backbox houses a main system slave unit equipped with a 4010-9908 four double-pole double-throw two-amp relay board, a 4010-9912 serial digital alarm communicator transmitter bracket, and dual 25 Ah batteries. Field wiring enters the enclosure to connect individual notification appliance circuits and IDNet signaling line circuits to their respective terminal blocks. A 120VAC 60Hz power supply connects through a dedicated terminal while maintaining separation from power-limited circuitry within the designated shaded non-power-limited area of the backbox. Supervisory and trouble signal wiring route directly to auxiliary relay terminals to integrate with existing building facilities.
- 1 2 3 4 5 6 7 8 - B + B - A + A + B B + - A A - 1 2 3 4 5 6 7 8 - B + B - A + A + B B + - A A 1 2 1 2 3 4 5 6 7 8 - B + B - A + A + B B - SHLD - 9 10 + A A SHLD 1 2 3 - +
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