The FANUC A06B-6077-H002 is a 200V-input power failure backup module used in compatible FANUC Alpha-series CNC amplifier systems.

FANUC documentation identifies this exact model as the version with control power-supply backup functionality. It is designed to detect an incoming power failure and provide the system with the signals and short-term power support required for configured machine-protection actions.

In a properly configured CNC system, the module can support functions such as:

• Detecting a loss or significant drop in the incoming power supply
• Sending a power-failure detection signal to the PMC
• Supporting programmed machine-protection actions
• Maintaining control power from the DC link for a limited period
• Controlling the charging of an optional auxiliary capacitor module
• Coordinating regenerative-energy handling after a power failure

These functions depend on the complete amplifier, PMC ladder, CNC, capacitor-module, resistor-module, wiring, and machine configuration.

The A06B-6077-H002 is commonly searched for as a FANUC Power Failure Backup Module, Alpha Backup Power Module, CNC Power Back-Up Module, or 200V Power Failure Module.

It is suitable for replacement when the original unit has confirmed power-failure detection problems, control-power backup faults, damaged internal circuitry, abnormal status indications, or communication problems with the related PMC and amplifier system.

• Power-failure detection and backup functions tested before shipment
  
• In stock and prepared for prompt dispatch
  
• Worldwide DHL, UPS, and FedEx shipping

Product Details

• Brand: FANUC
• Part Number: A06B-6077-H002
• Alternative Format: A06B6077H002
• Official Product Type: Power Failure Backup Module
• Common SEO Name: Alpha Power Failure Backup Module
• Input Classification: 200V Type
• Backup Function: Control Power-Supply Backup Included
• Product Series: A06B-6077
• Application: Compatible FANUC Alpha-Series CNC Amplifier Systems
• Function: Power-failure detection and short-term control-power support
• Reference Weight: Approximately 2.7kg
• Wiring Board Reference: A16B-2203-0510
• Printed Circuit Board Reference: A20B-2003-0020
• Category: FANUC CNC Power Backup Module / Industrial Power Control Unit

The product classification, backup configuration, internal board references, input type, and reference weight above come from FANUC technical documentation.

System Function Note

The A06B-6077-H002 is not a general-purpose UPS and should not be presented as a standalone power source for an entire CNC machine.

Its purpose is to operate as part of a specifically configured FANUC drive and control system. After detecting a power failure, it can help maintain control power and support programmed protective actions, such as controlled deceleration or machine retraction, for the period permitted by the available DC-link and auxiliary stored energy.

Depending on the machine design, the system may also use:

• Sub Module C: Auxiliary capacitor module
• Sub Module R: Regenerative resistor module
• External 24VDC control-power backup
• PMC ladder logic for machine-protection sequencing

The required components vary by application and should be checked against the original machine wiring and FANUC documentation.

Compatibility Note

FANUC documentation distinguishes two similar modules:

• A06B-6077-H001: Without control power-supply backup function
• A06B-6077-H002: With control power-supply backup function

They should not be treated as automatically interchangeable.

Before ordering the A06B-6077-H002, please verify:

• Complete FANUC part number
• Requirement for the 200V input version
• Control power-supply backup requirement
• Original wiring-board and PCB numbers
• Connected PSM, SVM, and SPM models
• Sub Module C and Sub Module R configuration
• PMC ladder and power-failure sequence
• Connector and terminal arrangement
• Existing alarm or fault diagnosis

Installation and testing involve potentially hazardous DC-link voltages and should be performed only by qualified personnel using the applicable FANUC procedures.

Common Use Cases

• FANUC power failure backup module replacement
• Repair of CNC power-failure detection faults
• Troubleshooting failed control-power backup operation
• Maintenance of Alpha-series amplifier systems
• Diagnosis of PMC power-failure signal problems
• Replacement of damaged internal power or control circuitry
• Preparation of a tested spare module for machine maintenance

Sales & Support

Each A06B-6077-H002 power failure backup module is inspected and tested under applicable conditions before delivery.

Worldwide shipping is available through DHL, UPS, FedEx, and other express carriers. REACO CNC provides module repair service, warranty coverage, testing-video support, and technical assistance for FANUC CNC power and amplifier components.