ABB ital Isolated I/O Extension Board, Order Code: 3BSE005178R0001; Coated variant: SDCS-IOB-23-COAT (3ABD00015741-D)

Core Function SDCS-IOB-23 is a pluggable external isolated digital input/output expansion board exclusively developed for ABB DCS800 series DC variable speed drives. Expands the limited native digital I/O channels of DCS800 main control boards, delivering isolated digital signal interface between DC drive core controller and field devices (limit switches, emergency stop buttons, contactors, solenoid valves, fault feedback sensors). Provides full galvanic optical isolation between drive internal logic circuit and field high-voltage 230VAC signals to eliminate ground loop interference and improve electrical safety. Transmits digital command signals (start/stop, jog, speed selection) from PLC/HMI to the DC drive, and feeds back drive status signals (ready, running, fault, thermal alarm) to up