SuperBus 2000 2AMP Power Supply.
The power supply provides an additional 12 VDC, 2 amps (current limited) for Concord 4 system devices and is supervised via the SuperBus® 2000 digital data bus. The power supply uses a 24 VAC, 50 VA power transformer. In case of an AC power failure, a 12 VDC, 4.5 or 7 Ah backup battery (not included) provides power to connected devices. The battery is tested by the power supply on power up, every two minutes afterward, and whenever the panel tests its own backup battery.