FANUC A20B-2000-0880 is a two-slot backplane printed circuit board for compatible FANUC CNC control-unit hardware. It provides the mechanical card positions and internal electrical interconnection required by the associated control boards.

FANUC Series 0i Model A maintenance documentation identifies A20B-2000-0880 as the back panel used with the A02B-0279-C002 two-slot control-unit cabinet. The PCB number and complete cabinet ordering number describe related but different product levels.

A20B-2000-0880 Product Information

Two-Slot Control Hardware Interconnection

The A20B-2000-0880 acts as the connection base for the boards installed in the two-slot control cabinet. It routes the required internal connections between compatible control hardware. The backplane itself does not execute CNC programs, store machine data, process I/O logic or regulate servo-motor power.

PCB Number vs. Complete Cabinet Number

A20B-2000-0880 identifies the backplane PCB, while A02B-0279-C002 identifies the documented complete two-slot cabinet. Confirm whether the required replacement is the bare backplane, the framed cabinet assembly or a complete control unit containing other boards.

Compatibility and Installation Checks

Match the full A20B-2000-0880 number and revision against the original board. Confirm the CNC model, two-slot frame, power supply PCB, main PCB, connectors and installed option or I/O boards. Inspect the original unit for damaged contacts or contamination, isolate power and use anti-static protection during replacement.

Related resources: FANUC PCB boards, FANUC CNC controls and FANUC control and PCB repair services.