UNITROL 5000 PSI Board

The ABB UNS 0882A-P V1 (3BHB006309R0001) is a Power Signal Interface (PSI) – Primary unit designed for ABB’s UNITROL 5000 excitation systems and AC 800M / Advant 800xA DCS platforms. It serves as a critical power-and-signal bridge between the incoming 24V DC supply and the rack backplane, performing power filtering, signal isolation, and level conversion to ensure clean, noise-free communication across the control system.