Mitsubishi Electric HC-SFS502B HC-SFS Series AC Servo Motor

Description

Designed for high-performance motion control, the Mitsubishi Electric HC-SFS502B AC Servo Motor delivers reliable dynamic response in middle-inertia industrial automation setups. Engineered for compatibility with the MELSERVO-J2-Super amplifier range, this robust 5 kW motor incorporates an integrated electromagnetic holding brake, ensuring vertical axis retention and immediate load stabilization upon de-energization. Its middle-inertia design balances load matching and acceleration characteristics, mitigating rotor resonance in heavy mechanical systems.

Features

• High-Resolution Feedback: Outfitted with an integrated incremental/absolute encoder for precise positioning and stable velocity control at low speeds.
• Integrated Electromagnetic Holding Brake: Built-in 24VDC brake prevents axis drop or drift during emergency stops and power outages.
• Middle-Inertia Rotor: Optimized rotor dynamics reduce mechanical stress and simplify tuning for high-load systems.
• Rugged Enclosure Protection: Industrial-grade sealing protects against dust, oil mist, and humidity typical of harsh factory floors.
• Seamless Drive Integration: Fully matched for plug-and-play setup with compatible MR-J2S-500A and MR-J2S-500B servo amplifiers.

Applications

• Heavy-Duty Gantries: High-inertia coordinate positioning systems and material transfer cranes.
• Vertical Z-Axis Drives: Automated handling, packaging, and vertical tooling columns requiring strict drift prevention.
• Metal Processing Machinery: Bending, stamping, and cutting machines operating under demanding mechanical loads.
• Rotary Indexing Tables: Precision indexing operations requiring rigid holding torque during dwell periods.

Technical Specifications

Connections and Interfaces

Empirical Engineering Insights

Alternative Models & Compatibility

When migrating legacy systems, the HC-SFS502B directly replaces the standard non-brake HC-SFS502, though the external 24VDC brake supply cabling must be retrofitted. For modernizations moving from MR-J2S drives to the MR-J4 platform, direct connection is not native; users must transition to HG-SR502B motors or use MR-J4 series amplifiers configured with compatible conversion software and interface modules. Keep in mind that older MR-J2S firmware revisions may require parameter adjustment to recognize the high-resolution encoder on the "B" (brake) variant during replacement commissioning.

Application Pitfalls & Engineering Notes

This motor's electromagnetic brake is strictly designed as a holding brake and must never be used for dynamic braking or decelleration. Attempting to engage the brake while the motor is running at speed will cause rapid wear on the brake lining, leading to slippage and eventual mechanical failure of the holding mechanism. Additionally, heat dissipation is highly dependent on the mounting frame. Ensure the motor is bolted directly to a steel plate acting as a heatsink (minimum dimensions 400mm x 400mm x 20mm recommended) to prevent the internal temperature from triggering amplifier thermal fault codes (AL.30 or AL.46).

Commissioning & Wiring Tips

To eliminate electromagnetic interference (EMI) causing intermittent absolute position faults (such as AL.1A or AL.20 on the servo amplifier), always use double-shielded encoder cables (such as MR-EKCBL-M) with the shield terminated to the connector frame. Do not route the 24VDC brake control cable alongside high-voltage motor power cables within the same conduit. Always install a surge-absorbing diode in reverse parallel across the brake control relay coil to prevent voltage spikes from back-feeding into the drive's output circuits.

Installation Guidelines