FANUC A20B-8202-0150 is an internal power-supply and backplane PCB used in selected FANUC CNC and robot controller assemblies. FANUC documentation lists it within the two-slot backplane configuration of the R-30iB Mate Plus controller, together with A20B-8201-0720.

The board is also found in selected later 0i-MF Plus and 0i-TF Plus control configurations. It is not the CNC main CPU board or a complete external power supply. Confirm the board number, PCB revision, host-unit nameplate, slot configuration and connectors before replacement.

A20B-8202-0150 Product Information

Controller Power and Backplane Function

A20B-8202-0150 forms part of the controller's internal power and backplane assembly. It supports power distribution and board-to-board interconnection within the approved host configuration. A fault may contribute to a dead controller, intermittent start-up or internal power alarms, but the complete power source, wiring and connected boards should be diagnosed before replacement.

CNC and Robot Controller Compatibility

FANUC documents A20B-8202-0150 in the R-30iB Mate Plus two-slot backplane assembly. CNC installations may use the same board in specific later 0i-MF/TF Plus configurations, but this does not make it universal across all 0i-F Plus, 30i, 31i, 32i or robot controllers. Match the board label and revision rather than relying only on the controller family.

Testing and Installation Notes

REACO CNC checks the label, PCB revision, power components, fuses, capacitors, connectors, solder condition and controller operation as applicable. Back up CNC or robot data before service. Qualified personnel should isolate and lock out power, verify stored voltage has discharged and use ESD protection before removing the board.

Related resources: FANUC PCBs, FANUC CNC controls and FANUC CNC and robot repair service.