ABB APBU-44CABB APBU-44C 4-Channel Fiber Optic Branching Unit, Material No.: 64669982 / 6...

& Core Function Description ABB APBU-44C 4-Channel Fiber Optic Branching Unit, Material No.: 64669982 / 64688391 C Core Function The APBU-44C is a dedicated fiber optic signal splitter/branching unit exclusively designed for ABB ACS800 series industrial variable frequency drives. It distributes the single fiber optic control link signal from the drive main control board to up to 4 separate I/O, auxiliary or extension drive modules. It provides galvanic isolation between fiber channels to eliminate electromagnetic interference (EMI), stabilizes high-speed serial communication between drive control hardware, and enables multi-module parallel expansion of ACS800 drive systems. It acts as a central fiber hub for internal drive communication networks in high-power multi-drive cabinets. Core Fun