A06B-0085-B503
May 13, 2026

A06B-0085-B503

FANUC AC Servo Motor Model: A06B-0085-B503 Specification & Instruction Manual (English Version, Text Only) 1. General Information Model Number: A06B-0085-B503 Manufacturer: FANUC Corporation Product Type: AC Permanent Magnet Synchronous Servo Motor Series: βiS 22/2000 HV Medium Inertia High Voltage Type Shaft Type: Straight shaft with keyway Holding Brake: Built-in 24 VDC electromagnetic static holding brake Built-in Encoder: βiA 128K high-resolution incremental encoder Protection Class: IP65 Cooling Method: Natural air cooling, fanless fully enclosed structure Mounting Type: Flange mounting Net Weight: Approximately 18.5 kg

Description

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2. Electrical Specifications

  • Rated Input Voltage: 380–400 VAC, 3-phase, 50/60 Hz

  • Rated Output Power: 2.2 kW

  • Rated Torque: 10.5 N·m

  • Rated Speed: 2000 RPM

  • Maximum Speed: 2,is500 RPM

  • Rated Current: 3.8 A

  • Brake Rated Voltage: 24 VDC

  • Brake Holding Torque: ≥ 10 N·m

  • Insulation Class: F

  • Winding Type: Three-phase high-voltage brushless permanent magnet winding

3. Mechanical Specifications

  • Rotor Characteristic: Medium inertia rotor

  • Bearing Structure: Sealed bearing with lifetime pre-lubrication

  • Noise Level: ≤ 75 dB(A) under rated operating condition

  • Shaft Precision: Low runout tolerance for high transmission accuracy

  • Rotation Direction: Standard counterclockwise viewed from shaft end

  • Mechanical Structure: Fully enclosed fanless industrial design

4. Environmental Operating Conditions

  • Operating Ambient Temperature: 0°C to +40°C

  • Storage Temperature: -20°C to +60°C

  • Relative Humidity: 40% ~ 80% RH, non-condensing

  • Installation Altitude: ≤ 1000 meters above sea level

  • Vibration Resistance: 0.5g within 10 Hz – 100 Hz frequency range

  • Application Environment: Indoor industrial use; not suitable for explosive, flammable or strong corrosive atmosphere without protective measures

5. Key Features

  1. High voltage 400V class design reduces operating current, supports long-distance wiring with low voltage drop and saves cable installation cost.

  2. Medium inertia rotor balances dynamic response and running stability, suitable for medium load and high-precision positioning working conditions.

  3. Equipped with βiA 128K high-resolution incremental encoder to realize accurate speed and position closed-loop control.

  4. Integrated 24VDC holding brake provides reliable static locking performance, effectively preventing load falling for vertical and suspended axes.

  5. IP65 dustproof and splashproof protection adapts to factory metal dust, oil mist and coolant splash environment.

  6. Straight shaft with keyway structure facilitates convenient coupling installation and ensures stable torque transmission.

  7. Brushless motor structure features low running noise, no carbon brush wear, long service life and maintenance-free under normal working conditions.

  8. Fanless natural air cooling structure reduces failure points, lowers operation noise and improves overall equipment reliability.

6. Application Scope

  • 400V level CNC machine tools, lathes, milling machines and machining center vertical and medium-load feed axes

  • High voltage industrial automation production line medium-load positioning and lifting transmission mechanism

  • Packaging machinery, printing machinery, textile machinery and general industrial automation equipment

  • Servo system with long-distance wiring requirement and low current loss

  • Vertical installation, suspended load and lifting equipment requiring anti-fall safety protection brake

7. Installation Guidelines

  1. Install the motor on a rigid, flat and non-deformable mounting base to avoid resonance and mechanical stress deformation.

  2. Maintain precise coaxial alignment between motor shaft and load shaft to reduce vibration, noise and premature bearing wear.

  3. Use dedicated shielded high-voltage servo power cable, encoder cable and brake cable; separate power wiring and signal wiring to reduce electromagnetic interference.

  4. Reserve sufficient surrounding space for natural heat dissipation; do not cover or block the motor housing heat dissipation area.

  5. Avoid strong impact, dropping and extrusion on motor body, encoder rear cover and brake assembly during handling and installation.

  6. Brake operation rule: Apply 24 VDC power to release the brake; cut off 24 VDC power to engage the brake for static holding only.

8. Maintenance Instructions

  1. Regularly inspect motor running status including abnormal noise, vibration and temperature rise.

  2. Keep motor surface clean, remove dust, metal chips and oil contamination periodically.

  3. Built-in sealed bearings adopt lifetime lubrication, no regular refueling maintenance required under normal working conditions.

  4. Inspect encoder cable, brake cable integrity and connector fastening status at regular intervals.

  5. Periodically test the holding performance of the brake to ensure safety for vertical and suspended load applications.

  6. Avoid long-term overload operation and frequent forward and reverse start-stop beyond allowable load range.

9. Safety Precautions

  1. Cut off all 380–400V high voltage power and 24VDC brake power before installation, wiring and maintenance. Wait at least 15 minutes for internal capacitor discharge to prevent electric shock hazard.

  2. Do not touch rotating shaft and moving parts during motor running state.

  3. The built-in holding brake is only used for static position locking; it is strictly prohibited for dynamic braking during high-speed operation.

  4. Do not disassemble motor, brake and encoder privately; unauthorized disassembly will void warranty and damage assembly precision.

  5. Do not use the motor in environment with conductive dust, heavy moisture condensation and chemical corrosion without special protection.

10. Troubleshooting

  • Motor fails to start: Check 3-phase 400V power supply, wiring tightness, servo amplifier alarm code, servo enable signal and brake release signal.

  • Abnormal noise and vibration: Check mounting rigidity, coupling alignment, bearing aging and mechanical load jamming.

  • Motor overheating: Inspect long-term overload, ambient temperature over limit, poor ventilation and brake incomplete release.

  • Positioning deviation out of tolerance: Check encoder cable breakage, loose connector, servo parameter mismatch and mechanical transmission backlash.

  • Unstable speed: Verify power supply voltage fluctuation, sudden load change and encoder signal interference.

  • Brake cannot hold or release normally: Check 24VDC brake power supply, wiring continuity, connector tightness and brake coil damage.


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