Fanuc A20B-2002-0521 Operator Panel IO Module PCB

The Fanuc A20B-2002-0521 Operator Panel I/O PCB Board is a digital I/O interface that links the operator panel to the CNC controller within Fanuc control systems. It supports 48 inputs and 32 outputs, handling discrete signals from buttons, switches, and indicators to enable reliable communication between the operator interface and machine logic. Designed for internal PCB mounting in control cabinets as a surface-mount industrial board, it is compatible with Fanuc 0i, 15i, 16i, 18i, 20i, and 21i CNC systems and does not include an MPG interface. As a legacy replacement, this module is used for panel interfacing, maintenance, and replacement of faulty I/O boards in CNC machines such as machining centers, lathes, and milling machines.