Mitsubishi MR-J3-100A4-ETHERCAT Servo Amplifier

Drive your machines with power and built-in safety. The Mitsubishi MR-J3-100A4-ETHERCAT is a smart servo amplifier. It works with a wide 380 to 480V AC three-phase power range. This unit includes the important Safe Torque Off (STO) safety function. It keeps your operators safe during maintenance and faults. Get reliable performance and modern safety in one compact drive.

• Wide Voltage Range: Works with 380V, 400V, or 480V 3-phase systems.
• Built-in Safety: Integrated Safe Torque Off (STO) function meets safety standards.
• Modern Network: Uses EtherCAT for fast and precise communication.
• Compact & Robust: Lightweight at 1.7kg but built for industrial vibration.

Core Electrical Specifications

• Brand & Model: Mitsubishi MR-J3-100A4-ETHERCAT Servo Amplifier.
• Power Supply: 3-phase, 380 to 480V AC, 50/60 Hz.
• Safety Function: Integrated Safe Torque Off (STO).
• Communication: High-speed EtherCAT network protocol.
• Braking: Built-in dynamic brake for controlled stopping.
• Cooling: Forced air cooling with internal fan.

Physical & Environmental Specifications

• Weight: Approximately 1.7 kg.
• Structure: Open frame, natural-cooling design for panel mounting.
• Operating Temperature: From 0°C to 55°C.
• Storage Temperature: From -20°C to +65°C.
• Vibration Resistance: Up to 5.9 m/s².
• Protection: Requires installation in a protective IP-rated control cabinet.

System Integration & Safety

• Safety Integration: STO allows safe connection to safety relays or PLCs for lockout.
• Motor Compatibility: Pairs with Mitsubishi MELSERVO servo motors of appropriate power rating.
• Network Setup: Configure via EtherCAT master and Mitsubishi setup software.
• Regenerative Handling: May require an external regenerative resistor for high-duty cycles.
• Wiring: Follow manual guidelines for main power, motor, and safety circuit wiring.

Packaging & Warranty

• The Mitsubishi MR-J3-100A4-ETHERCAT is supplied new in factory packaging.
• Package includes the amplifier and required documentation.
• This product comes with a 12-month warranty.
• We ship worldwide using FedEx, UPS, and DHL express services.
• Full tracking information is provided upon shipment dispatch.

Frequently Asked Questions

How does the Safe Torque Off (STO) function work?

• The STO safety function in the MR-J3-100A4-ETHERCAT cuts power to the motor drive circuit. When activated (via its safety terminals), it prevents the motor from generating torque, allowing for safe maintenance. It is a Category 3/PLd safety function as per relevant standards.

Can I use this amplifier on a 415V system?

• Yes. The wide input range of 380-480V AC covers common voltages like 400V, 415V, and 440V. Ensure your supply voltage is stable and within this range for reliable operation.

What is the benefit of EtherCAT for motion control?

• EtherCAT offers extremely fast and deterministic communication. It allows for highly synchronized multi-axis control, simpler wiring (daisy chain), and easy integration with various sensors and I/O on the same network.

Do I always need an external regenerative resistor?

• Not always. The built-in dynamic brake handles basic stopping. An external resistor is needed if your application has high inertia, frequent start/stop cycles, or vertical axes, where significant regenerative energy is produced.

How do I connect the STO safety terminals?

• The STO terminals are typically connected in series with your safety circuit (e.g., emergency stop button, safety door switch). The circuit must be designed by a qualified professional according to local machinery safety regulations.

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