MR-J4-700A – 7kW Servo Amplifier for Precision Motion Control

Detailed Technical Specifications

• Brand: Mitsubishi Electric
• Model: MR-J4-700A (MELSERVO MR-J4 series)
• Product Line: MELSERVO MR-J4
• Phase Type: 1-phase or 3-phase (field selectable)
• Command Interface: General purpose interface
• Number of Axis: 1 axis control
• Output Power Rating: 7 kilowatt (7kW)
• Power Supply Voltage: 200 to 240 Volts AC
• Braking Unit: Built-in dynamic brake and regenerative brake
• Rated Current: 37 Amperes
• Communication Protocol: RSS-422 and RS-485 networks
• Current Consumption: 28.9 Amperes
• Digital Inputs: 9 points
• Digital Outputs: 5 points
• Analog Inputs: 2 channels
• Analog Outputs: 2 channels
• Cooling Method: Forced ventilation cooling
• Power Consumption: 45 Watts
• Ambient Operating Temperature: 0 to 55 °C (non-freezing environment)
• Protection Class: IP20 (front panel)
• Dimensions (H x W x D): 11.81 x 6.77 x 7.87 inches (300 x 172 x 200 mm)
• Weight: 15.00 lbs (6.80 kg)

Frequently Asked Questions (FAQ)

• Can the MR-J4-700A control a servo motor larger than 7kW? No, always match the drive rating to the motor's continuous rating.
• What software configures this servo drive? Use MR Configurator2 from Mitsubishi (free download).
• Does the drive support absolute position encoding? Yes, when paired with Mitsubishi's absolute encoder motors.
• Is external regenerative resistor required for high-inertia loads? The built-in regenerative brake handles most loads, but large inertial applications may need an external resistor.
• What happens if ambient temperature exceeds 55°C? The drive will reduce output current or trigger an over-temperature alarm.
• Can I use the MR-J4-700A in a dirty environment? No, IP20 rating requires installation inside a clean control cabinet.

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