FANUC A20B-3300-0090 04B Controller CPU Board is the central processing unit module for FANUC CNC control systems. With part number A20B-3300-0090 and revision 04B, it serves as the controller’s core for executing CNC programs and coordinating communications with attached I/O hardware. This CPU board is part of the FANUC A20B series and is intended for use in compatible FANUC controllers.
