The FANUC A06B-6111-H037#H550 is a standard αi Series SPM-37i Type A spindle amplifier module for compatible FANUC CNC spindle systems. It regulates spindle-motor current and speed using sine-wave PWM control through an IGBT bridge.

This exact #H550 configuration has one spindle-sensor input. Its documented rated current is 165 Arms, and it belongs to the 200–240VAC input series. A06B6111H037H550 is only an auxiliary search format; always identify the unit from its complete nameplate.

A06B-6111-H037#H550 Product Specifications

SPM-37i Spindle-Control Functions

The module connects to a compatible power-supply module through its DC-link and PSM interfaces. CNC communication uses JA7A/JA7B, JYA2 accepts motor feedback and JYA3 connects the position coder. TB2 provides the controlled three-phase output to the matched spindle motor.

Type A and #H550 Compatibility

A06B-6111-H037#H550 is the one-sensor Type A model. A06B-6112-H037#H550 is Type B with two spindle-sensor inputs and is a different configuration. Confirm the full order number, suffix, CNC interface, detector, motor, power-supply module, connectors and machine parameters. Do not select a replacement from the SPM-37i name alone.

Testing and Installation Notes

REACO CNC checks the nameplate, housing, boards, power stage, terminals, connectors, fan, status display, communication, feedback circuits, alarms and spindle operation as applicable. Back up CNC and spindle parameters before removal. Qualified personnel must isolate power and wait until the DC-link charge indicator is off before handling the module.

Related resources: FANUC CNC parts, FANUC motors and FANUC spindle drive repair service.