FANUC A20B-8101-0285 is a Main Control PCB designed for FANUC Series 0i-Mate-C (0i-C Mate) CNC control systems. As the central processing board of the controller, it manages CNC operation logic, machine communication, servo interface coordination, I/O Link communication, and system data processing. The board integrates multiple communication interfaces, including FSSB servo networking, RS-232C ports, I/O Link, and spindle encoder connections, supporting reliable machine control and automation performance in CNC applications. [stock available]