PS904-4RL-FA-BBK Von Duprin Power SupplyBase Power Supply (4A @ 12/24 VDC field selectable) (approx. weight 11 lbs) PS904 is able to accept a total of 2 optional distribution boards.
PS904-KL-4RL-BBK Von Duprin Power SupplyBase Power Supply (4A @ 12/24 VDC field selectable) (approx. weight 11 lbs) PS904 is able to accept a total of 2 optional distribution boards.
PS904-2RS-BBK Von Duprin Power SupplyBase Power Supply (4A @ 12/24 VDC field selectable) (approx. weight 11 lbs) PS904 is able to accept a total of 2 optional distribution boards.
PS906-4RL-BBK Von Duprin Power SupplyBase Power Supply (6A @ 12/24 VDC field selectable) (approx. weight 7 lbs) PS906 is able to accept a total of 3 optional distribution boards.