Power supply board 250W, 20A/12V or 10A/24V Secondary voltage power supply, 5-18V adjustable 4A max, class 2 power limited output 16 relay lock control outputs class 2 power limited at 2.5A per output 16 auxiliary DC outputs class 2 power limited at 2.5A per output Enclosure, Size 24. (20W x 24H x 4.5D) with Mercury/Lenel backplate