Fanuc A06B-6110-H026 Power Supply Module

The Fanuc A06B-6110-H026 is a dedicated power supply module designed for the Fanuc CNC servo drive system. This module converts AC mains power into the regulated DC voltage required to operate the servo amplifiers and control circuits within the CNC cabinet. It is an integral component of the power distribution chain, providing stable, clean energy to ensure precise axis motion and reliable system performance in machining centers, lathes, and other machine tools.

The module features a 3‑phase AC input (200‑230 V AC or 380‑480 V AC, depending on configuration) and outputs a regulated DC bus voltage. It includes a built‑in regenerative braking circuit with a resistor to dissipate excess energy during deceleration, preventing overvoltage faults. The A06B‑6110‑H026 also incorporates comprehensive protection against overcurrent, overvoltage, and overheating, protecting both the module and downstream amplifiers.

Technical Specifications

• Input voltage: 3‑phase 200‑230 V AC (±10%) or 380‑480 V AC (±10%) – variant dependent

• Input frequency: 50/60 Hz (±5%)

• DC bus output voltage: 280‑340 V DC (for 200 V input) or 540‑680 V DC (for 400 V input)

• Rated output power: Typically 10‑15 kW (refer to system configuration)

• Regenerative braking: Integrated chopper with external resistor connection

• Protection: Overcurrent, overvoltage, undervoltage, thermal shutdown, short‑circuit

• Status indicators: LED for power‑on, DC bus OK, and fault

• Cooling: Forced air (built‑in fan, temperature controlled)

• Connection: Screw terminals for input/output and control signals

• Mounting: Panel mount with four screws

• Operating temperature: 0°C to +45°C

• Storage temperature: -20°C to +70°C

Key Functional Features

• Regenerative energy management: The internal braking circuit dissipates energy from decelerating motors, enabling rapid stops and preventing DC bus overvoltage.

• Soft start: A pre‑charge circuit limits inrush current during power‑up, extending the life of the input components.

• Diagnostic outputs: Fault signals (relay contacts) can be wired to the CNC controller to trigger emergency stops.

• Fan control: The cooling fan runs only when necessary, reducing energy consumption and noise.

Typical Applications

• CNC machining centers: Powering servo amplifiers for X, Y, Z axes and spindle drives.

• Turning centers: Supplying power to feed and turret drives.

• Grinding machines: Providing stable DC bus for precision wheel and table positioning.

• Robotic cells: Powering servo drives for articulated arms and positioners.

Installation and System Integration

Mount the module securely in the CNC cabinet, ensuring proper ventilation around the fan inlet and exhaust. Connect the AC input terminals (R, S, T) to the main contactor and the DC bus output terminals to the servo amplifier(s). The regenerative braking resistor must be connected to the designated terminals (B1, B2) with the correct resistance value as specified by the system design. Control signals (enable, reset, fault) are connected via the terminal block. Grounding is critical – connect the PE terminal to the cabinet earth. All power cables should be sized based on the module’s current rating and routed away from control cables to minimize noise.

Compliance and Standards

The A06B‑6110‑H026 is CE marked and complies with UL and CSA standards. It meets the requirements of EN 61800‑5‑1 (adjustable speed electrical power drive systems) and is RoHS compliant.

Conclusion

The Fanuc A06B‑6110‑H026 power supply module is a critical, high‑reliability component for CNC servo systems. Its robust power handling, regenerative braking, and comprehensive protection ensure consistent machine performance and protect expensive servo amplifiers from electrical faults.