Mitsubishi Electric MR-J3-350B MELSERVO-J3 Servo Amplifier

Description

Designed for high-performance motion control, the MR-J3-350B AC servo drive represents a core component within the Mitsubishi Electric MELSERVO-J3 series ecosystem. This drive is engineered to control rotary servo motors with high precision and dynamic responsiveness, integrating seamlessly into distributed control systems via the SSCNET III high-speed synchronous network interface. The MR-J3-350B features advanced real-time auto-tuning and vibration suppression control, allowing for optimal performance customization matching specific mechanical structures.

Operating with a rated output capacity of 3.5 kW, this unit is built to drive compatible industrial motors while maintaining high speed constancy. It interfaces natively with absolute position encoders of high resolution (18-bit), ensuring reliable position feedback and reducing tracking errors during demanding positioning cycles. The robust hardware design utilizes forced cooling to manage thermal performance in compact electrical enclosures.

Features

• SSCNET III communication interface for high-speed, noise-immune fiber optic network integration with motion controllers.
• Compatible with 18-bit absolute position encoders, providing 262,144 pulses per revolution for precise velocity and position loop control.
• Advanced vibration suppression system designed to mitigate low-frequency mechanical resonances during acceleration and deceleration.
• Real-time auto-tuning function that automatically calculates load inertia and adjusts control gains dynamically.
• Internal dynamic brake mechanism for prompt motor deceleration during emergency stops or power loss events.

Applications

• Multi-axis CNC machining centers and precision milling machinery.
• High-speed packaging, labeling, and filling equipment.
• Semiconductor manufacturing tools and electronic component insertion systems.
• Automated materials handling, pick-and-place gantry systems, and industrial robotics.

Technical Specifications

Connections and Interfaces

Installation Guidelines

• Mount the servo amplifier vertically to the mounting panel surface using the integrated mounting brackets.
• Ensure clearance of at least 40 mm above and below the unit, and 10 mm on the sides to permit unhindered airflow from the cooling fan.
• Route the fiber optic SSCNET III cables with a minimum bending radius that respects the physical constraints of the optical fiber to prevent signal attenuation.
• Connect protective earth (PE) terminals to a dedicated grounding point utilizing heavy-gauge ground wiring to minimize electromagnetic interference.

Compliance and Certifications

• CE Mark (Low Voltage Directive and EMC Directive)
• UL Listed (UL 508C)
• cUL Certified