Mitsubishi MR-J3-700A Servo Amplifier: High-Power Industrial Control

Drive heavy-duty automation. The Mitsubishi MR-J3-700A is a 7kW servo amplifier built for demanding industrial applications. It delivers robust power and precise control for large-scale machinery.

Key Features & Advantages

• High Power Output: 7.0 kW (7000W) rated power for driving large servo motors.
• Dual Power Inputs: Separate 3-phase main power and 1-phase control power for stable operation.
• Precision Engineering: Sine-wave PWM and current control ensure smooth, accurate motor performance.
• Built for Safety: Integrated dynamic brake provides reliable emergency stopping power.
• Robust Communication: RS-422 interface ensures reliable command signal transmission.

Complete Technical Specifications

Brand: Mitsubishi Electric
Model: MR-J3-700A
Product Series: MELSERVO-J3 Series Servo Amplifier
Rated Output Power: 7.0 kW (7000 Watts)
Rated Output Current: 37 A
Output Voltage to Motor: 3-phase 170 V AC
Main Circuit Supply: 3-phase 200-230V AC, 50/60 Hz (Permissible: 170-253V AC)
Main Circuit Current: 28.9 A
Control Circuit Supply: 1-phase 200-230V AC, 50/60 Hz (Permissible: 170-253V AC)
Control Circuit Current: 0.3 A
Control Circuit Consumption: 45 W
Interface Power: 24 V DC
Control System: Sine-wave PWM Control, Current Control System
Brake System: Built-in Dynamic Brake & Regenerative Resistor
Communication: RS-422 Protocol
Max Pulse Frequency: 1 Mpps (Differential), 200 kpps (Open Collector)
Cooling Method: Force-Cooled (Fan)
Enclosure: Open Type (IP00)
Operating Temperature: 0°C to +55°C
Weight: 9.07 kg (20.00 lbs)
Certifications: CE, UL 508C

Installation & Operation Guide

Install the MR-J3-700A in a spacious, ventilated cabinet. It requires two power connections: a 3-phase 200-230V AC for the main circuit and a separate 1-phase 200-230V AC for the control circuit. Ensure the cooling fan has clear airflow. The environment must be clean, dry, and within 0°C to 55°C. Use the RS-422 port for control signals. Due to its open (IP00) structure, protect it from dust, debris, and liquids.

Expert FAQs

What type of machinery is this amplifier suited for?
It is ideal for large industrial machines like metal forming presses, heavy-duty conveyors, large CNC mills, or injection molding machines.

Why are there two separate power supply inputs?
Separating the high-power main circuit from the sensitive control circuit improves stability and protects the control electronics from electrical noise.

What does "force-cooled" mean?
It uses an internal fan to actively blow air over the components. This is necessary to dissipate the significant heat generated at 7kW of power.

Can it handle high-speed positioning commands?
Yes. With a maximum pulse input of 1 million pulses per second, it can execute very fast and precise position commands.

Is external braking required?
No. The built-in dynamic brake and regenerative resistor handle braking and energy absorption for most applications.

Package & Warranty Details

Shipping Contents:
1 x MR-J3-700A Servo Amplifier
1 x Installation Manual

Quality Assurance: Your purchase includes a comprehensive 12-month warranty.

Global Delivery: Shipped promptly via FedEx, UPS, or DHL to your location.

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