The ABB 3BHE030579R0003 UNS0119 A-Z,V3 Control Unit is a high-performance process controller from ABB's Advant Controller 400 (AC 400) or System 800xA automation platform.
The ABB NPBU-42C 64011821D is a Branching Unit designed for ABB's Advant Controller 400 (AC 400) series or compatible MOD 300 distributed control systems.