The FANUC A16B-2203-0673 is the internal wiring/power PCB for compatible two-axis FANUC αiSV80/80 servo amplifiers. FANUC assigns it to both standard αiSV80/80 and HRV4-capable αiSV80/80L configurations.

This is a replacement circuit board rather than a complete servo drive. Confirm the full PCB number, board revision, A06B amplifier nameplate, connectors and power-device layout because similar αiSV boards support different current and axis combinations.

A16B-2203-0673 Product Information

αiSV80/80 Dual-Axis Function

Inside the complete amplifier, A16B-2203-0673 provides power-stage wiring and terminal connections for the L and M servo axes. The αiSV amplifier uses sine-wave PWM control with an IGBT bridge. Both axes provide 19 Arms rated output with a nominal current limit of 80 Apeak.

Standard and Level-Up Compatibility

A06B-6114-H209 and A06B-6117-H209 are standard αiSV80/80 amplifiers supporting HRV2 and HRV3. A06B-6117-H259 is the αiSV80/80L version supporting HRV4. Although all three use A16B-2203-0673, complete amplifiers should not be exchanged without checking the CNC, motor, control PCB and machine configuration.

Board Differences and Installation

A16B-2203-0672 is used for αiSV40/80, A16B-2203-0674 for αiSV80/160 and A16B-2203-0814 for the 400V αiSV80/80HV. REACO CNC checks the label, PCB, terminals, capacitors, connectors, power devices and compatible amplifier operation where available. Isolate power and fully discharge the DC link before service.

Related resources: FANUC servo PCBs, FANUC CNC controls and FANUC servo repair services.