The FANUC A20B-1008-0240 is an internal servo amplifier connection and adapter PCB. It provides the physical electrical interface between compatible amplifier assemblies and their internal control and power sections. It is a component board, not a complete servo drive or standalone CNC control card.

A documented application is the FANUC A06B-6160-H003 βiSV 40-B servo amplifier, where the A20B-1008-0240 is used alongside the A16B-3200-0512 power board and A20B-2102-0081 control board. Full amplifier and PCB revision numbers must be confirmed before replacement.

A20B-1008-0240 Product Information

Servo Amplifier Connection Function

The A20B-1008-0240 forms part of the amplifier’s internal board-to-board connection structure. Because it is an adapter PCB, damage to connectors, conductive paths or solder joints may interrupt communication or power-related connections between internal assemblies and contribute to amplifier startup or operation faults.

Fitment and Revision Confirmation

Do not select this PCB only because the host drive belongs to the βi series. Confirm A20B-1008-0240 on the removed board and compare the complete /01A, /02A or other revision, connector orientation, mounting points and PCB layout. A20B-1008-0230 is a related connection board but should not be treated as interchangeable without technical confirmation.

Testing and Installation Notes

REACO CNC checks the part number, PCB condition, connectors, solder joints and circuit continuity, followed by functional testing where the matching amplifier is available. Isolate the machine power and allow the DC bus to discharge before servicing. Installation should be completed by qualified personnel using ESD protection.

Related resources: FANUC PCBs, FANUC servo drives and FANUC drive and PCB repair services.