The FANUC A20B-2003-0810 is a one-slot backplane PCB used in compatible FANUC CNC control units.

FANUC hardware documentation identifies this part as a Back Panel (1 Slot) with an identification setting of ID=00. It is also commonly listed in the industrial replacement-parts market as a 1-slot backplane PCB, connection board, or CNC back panel board.

The board forms part of the CNC basic-unit hardware and provides the physical and electrical connection platform for a compatible option-board configuration.

Published FANUC hardware lists associate the A20B-2003-0810 with applicable Series 30i-A, 31i-A, 31i-A5, and 32i-A basic units equipped with one option slot. Exact compatibility depends on the CNC model, basic-unit specification, PCB revision, and installed option hardware.

It is suitable for replacement when the original backplane has confirmed connector damage, unstable board communication, physical circuit damage, or problems recognizing an installed option board.

• Backplane connections inspected and tested before shipment
  
• Stock available for prompt order processing
  
• Worldwide DHL, UPS, and FedEx shipping

Product Details

• Brand: FANUC
• Part Number: A20B-2003-0810
• Alternative Format: A20B20030810
• Type: Backplane PCB / Back Panel Board
• Slot Configuration: 1 Slot
• Hardware ID: ID=00
• Product Series: A20B-2003
• Referenced Control Family: FANUC Series 30i/31i/32i-A
• Application: FANUC CNC Basic Units
• Function: Connection platform for a compatible one-slot option-board configuration
• Category: FANUC CNC Backplane / Control Unit Connection Board

Compatibility Note

FANUC documentation distinguishes the following related back-panel configurations:

• A20B-2003-0600: No-slot back panel, ID=01
• A20B-2003-0810: One-slot back panel, ID=00
• A20B-2003-0610: Two-slot back panel, ID=10

Before ordering, please verify:

• Complete FANUC part number and PCB revision
• CNC control-series designation
• Basic-unit ordering code
• Required number of option-board slots
• Original connector and component layout
• Installed option-board configuration

A similar-looking backplane with a different slot count or hardware ID should not be treated as directly interchangeable.

Common Use Cases

• FANUC one-slot backplane PCB replacement
• CNC basic-unit back-panel repair
• Troubleshooting an unrecognized option board
• Repair of damaged connectors or circuit traces
• Restoration of unstable internal board communication
• Preparation of a tested spare for CNC maintenance

Sales & Support

Each A20B-2003-0810 backplane PCB is inspected and tested under applicable conditions before delivery.

Worldwide delivery is available through DHL, UPS, FedEx, and other express carriers. REACO CNC provides PCB repair service, warranty coverage, testing-video support, and technical assistance for FANUC CNC backplanes and control-system components.