The FANUC A20B-3300-0262 is a main CPU PCB used in compatible FANUC industrial control hardware. It performs central processor functions within the controller and works together with the main board, memory hardware, axis-control circuitry, communication interfaces and installed system software.

Published component directories associate this CPU card with selected FANUC FS30/FS60 and R-J3i hardware. Because controller configurations and PCB revisions can differ, replacement should be based on the complete A20B-3300-0262 marking, revision, original controller model and installed memory configuration.

A20B-3300-0262 Product Information

Main CPU Board Function

The A20B-3300-0262 provides the principal processing platform for its configured FANUC controller. It executes controller software and coordinates data exchange with memory, axis-control, I/O and communication hardware. It is an internal electronic board rather than a complete controller, servo amplifier or motor power device.

Controller and Revision Compatibility

Confirm the complete A20B-3300-0262 number and all revision characters printed on the original PCB. Compare the controller nameplate, motherboard, memory modules, connector layout, firmware, installed options and machine or robot configuration. Similar A20B-3300 CPU cards may use the same physical format but different processors, memory capacity or system software.

Data Backup and Installation

Back up controller programs, parameters, mastering data, variables, I/O configuration and other user data before removing the CPU card. REACO CNC checks the label, revision, connectors, PCB condition, processor circuitry, startup status and applicable communication functions. Installation and software restoration should be completed by qualified FANUC service personnel using anti-static protection.

Related resources: FANUC CNC and robot parts and FANUC CPU board repair services.