PS902-2RS Von Duprin Power SupplyBase Power Supply (2A @ 12/24 VDC field selectable) (approx. weight 9 lbs) PS902 is able to accept a total of 1 optional distribution board and 1 900-FA board
Base Power Supply (4A (16A inrush) @ 12/24 VDC field selectable) (approx. weight 9 lbs) PS914 is able to accept a total of 2 optional distribution boards and 2 900-FA boards