Mitsubishi MR-J3-11KB-LR Servo Amplifier: Safety-Integrated 1.1kW Performance

This is the Mitsubishi MR-J3-11KB-LR, a feature-rich 1.1kW servo amplifier from the MELSERVO MR-J3 series. The MR-J3-11KB-LR combines versatile control with a critical built-in safety function, making it suitable for modern machinery where performance and operator safety are paramount.

Key Features and Safety

• Integrated Safety: Built-in Safe Torque Off (STO) function compliant with safety standards, enabling risk reduction designs.
• Versatile Control Modes: Full support for position, speed, and torque control within one unit.
• High-Precision Feedback: Compatible with 22-bit high-resolution absolute encoders for exceptional accuracy.
• Robust Communication: Uses high-speed SSCNET III/H fiber optic interface for reliable, synchronized control.
• Reliable Cooling: Forced air cooling ensures consistent performance under continuous operation.

Complete Technical Specifications

• Brand & Series: Mitsubishi Electric, MELSERVO MR-J3 Series.
• Model: MR-J3-11KB-LR Servo Amplifier.
• Rated Output: 1.1 kW.
• Rated Current: Approximately [Consult official datasheet for exact value] A.
• Supply Voltage: 3-phase, 200-230VAC, 50/60Hz.
• Control Modes: Position control, Speed control, Torque control.
• Safety Function: Safe Torque Off (STO) as per IEC 61800-5-2.
• Encoder Support: 22-bit absolute encoder (multiturn).
• Communication Interface: SSCNET III / SSCNET III/H (fiber optic).
• Regenerative Braking: Built-in regenerative resistor or support for external unit.
• Cooling Method: Forced air cooling (fan).
• Protection Functions: Overcurrent, overload, overvoltage, overheating, encoder error.
• Operating Temperature: 0°C to +55°C.
• Compatible Motors: Mitsubishi HF-KP, HF-MP, HC-LP series and other MR-J3 servo motors with absolute encoders.

Warranty Information

This product is backed by a 12-month warranty covering any material or manufacturing defects.

Global Shipping

We ship internationally via FedEx, UPS, and DHL. You will receive tracking details after dispatch.

Frequently Asked Questions (FAQ)

What is Safe Torque Off (STO) and why is it important?

STO is a safety function that prevents unintended motor torque. When activated (e.g., via a safety relay or door switch), it electronically disables power to the motor, making it safe for personnel to approach. It can eliminate the need for a separate mechanical contactor, simplifying safe system design.

What are the benefits of a 22-bit absolute encoder?

A 22-bit encoder provides extremely high resolution (over 4 million positions per revolution) and absolute position data. This means the system knows its exact position immediately on power-up without needing a homing routine, enabling faster start-up and higher precision.

Can I use this amplifier with an incremental encoder motor?

The MR-J3-11KB-LR is designed for use with absolute encoder motors. Using it with an incremental encoder motor would not utilize its full capabilities and may require different parameter settings or may not be supported. Always match the amplifier to the motor's feedback type.

How does the STO function get wired and activated?

The STO function is typically activated through two redundant 24VDC safety input terminals on the amplifier. These are connected to a safety device (like a relay, light curtain, or door switch) that meets safety category requirements (e.g., Cat. 3, PLd).

Is the built-in regenerative braking sufficient for high-cycle applications?

The internal regenerative resistor is suitable for many standard applications. For high-duty cycles, high inertia loads, or frequent rapid stops, the internal resistor may overheat. In such cases, an external regenerative resistor or regenerative converter option should be used.

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