Mitsubishi Electric MR-J4-20A MELSERVO-J4 Series 1-Axis Servo Amplifier

Description

Precise motion control in automated manufacturing systems is driven by the MR-J4-20A, a high-performance 1-axis servo amplifier engineered by Mitsubishi Electric. Operating within the 200V class, this unit delivers a rated output of 0.2 kW, rendering it suitable for high-speed, high-accuracy industrial positioning. Built-in features include a sinusoidal wave PWM control system and an integrated dynamic brake, ensuring immediate, controlled deceleration and reliable performance under varying dynamic loads.

The MR-J4-20A utilizes a general-purpose command interface supporting pulse-train and analog inputs for position, speed, and torque control modes. Compatibility with 22-bit high-resolution encoders allows for fine positioning feedback. Integrated safety functions, certified to international functional safety standards, provide safe torque off (STO) capabilities, reducing external circuitry requirements in safety-critical automated layouts.

Features

• General-purpose interface for pulse train and analog command inputs.
• Built-in Safe Torque Off (STO) function complying with EN ISO 13849-1 Category 3 PL e and IEC 61508 SIL 3.
• Support for high-resolution 22-bit encoders (4,194,304 pulses/rev) to achieve smooth and stable low-speed performance.
• Integrated regenerative resistor with a 10 W capacity, expandable via external units.
• Advanced control functions including auto-tuning, adaptive vibration suppression filters, and machine analyzers.
• Dual communication interfaces featuring standard USB for configuration via MR Configurator2 and RS-422/RS-485 for multi-axis networking up to 32 axes.

Applications

• Packaging machines and labeling systems requiring synchronized axis control.
• Material handling systems, conveyors, and pick-and-place gantry units.
• Semiconductor fabrication systems and electronic component assembly.
• Machine tool feed axes and auxiliary mechanical actuators.

Technical Specifications

Connections and Interfaces

Installation Guidelines

• Mount the servo amplifier vertically on a flat, non-flammable surface to facilitate efficient natural heat dissipation.
• Ensure clearance of at least 10 mm on the left and right sides, and at least 40 mm above and below the amplifier for ventilation.
• Use shielded cables for encoder and control signal wiring to prevent electromagnetic interference (EMI).
• Connect the protective earth (PE) terminal securely to the control cabinet's main grounding point.
• Provide external circuit breakers or fuses matching the technical input ratings specified on the device.

Compliance and Certifications

• CE (LVD, EMC Directives)
• UL Listed / cUL
• Functional Safety: EN ISO 13849-1 Category 3 PL e, IEC 61508 SIL 3, EN 62061 SIL CL 3, EN 61800-5-2