The FANUC A16B-2203-0670 is the internal wiring and power PCB used in selected 200V-class, two-axis αi servo amplifier modules. FANUC configuration tables associate this board with the αiSV 20/40, also identified as SVM2-20/40i.

Documented hosts include A06B-6114-H206 and A06B-6117-H206. The PCB distributes power and provides internal connections for two servo channels; it is not the complete amplifier or its separate control PCB.

A16B-2203-0670 Product Information

Dual-Axis Servo Power Function

The A16B-2203-0670 forms the internal power and wiring section of the αiSV 20/40 amplifier. It supports the connection of the DC bus, power devices, motor-output circuits and protection components serving the two amplifier channels. Faults can contribute to overcurrent, power-stage, output or startup alarms.

Host Amplifier and Revision Checks

Confirm the complete host number, because A06B-6114-H206 and A06B-6117-H206 use this board while adjacent amplifier ratings use different PCBs. For example, αiSV 40/40 uses A16B-2203-0671 and αiSV 40/80 uses A16B-2203-0672. These boards should not be treated as interchangeable.

Match A16B-2203-0670, the /05A, /06A or other revision, connector positions, component layout and mounting points with the removed PCB. Also confirm whether the quotation covers the bare board or attached power devices and hardware.

Testing and Installation Notes

REACO CNC checks the label, PCB, connectors, power components, solder joints, insulation and channel outputs. Before replacement, record amplifier alarms and inspect the motors and cables for shorts. Isolate power, allow the DC bus to discharge and use ESD protection during installation.

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