Mitsubishi Electric MR-J3-500A MELSERVO-J3 AC Servo Amplifier

SKU MR-J3-500A

Disponibile

12-month warranty
Free returns within 30 days

Manufacturer: Mitsubishi Electric
Product No.: MR-J3-500A
Origin United States
Product Type: AC Servo Drives
Payment: T/T, Western Union
Weight: 0.5 kg
Dimensions: 350 mm x 250 mm x 150 mm
Shipping port: Xiamen
Warranty: 12 months

Product Description

Description

Precision motion profiles in demanding industrial automation architectures are governed by the Mitsubishi Electric MR-J3-500A, a digital MELSERVO-J3 AC Servo Amplifier designed to drive 5.0 kW rotary servo motors. This unit features a versatile general-purpose analog and pulse-train interface, enabling seamless integration into conventional positioning, velocity, and torque control loops. By leveraging real-time adaptive auto-tuning and advanced vibration suppression filters, this amplifier dynamically counteracts mechanical resonance and load inertia fluctuations, ensuring stable, high-speed positioning operations.

Features

High-Resolution Feedback Compatibility: Interfaces natively with 18-bit absolute/incremental encoders (262,144 pulses per revolution) to ensure exceptional speed stability and tracking precision.
Advanced Vibration Suppression: Employs adaptive vibration control filters that automatically adjust to eliminate high-frequency mechanical resonances and low-frequency load oscillations.
Real-Time Auto-Tuning: Continuously monitors machine inertia changes during operation, automatically optimizing gain parameters without requiring manual site intervention.
Rugged Electrical Design: Includes built-in dynamic braking circuits for controlled emergency deceleration under high-inertia conditions.

Applications

High-speed pick-and-place packaging systems.
Multi-axis CNC machining centers and metal forming machinery.
Automated materials handling and high-capacity gantry lifters.
Automotive assembly lines and precision indexing tables.

Technical Specifications

Parameter	Specification Value
Manufacturer	Mitsubishi Electric
Model Number	MR-J3-500A
Series	MELSERVO-J3
Compatible Motor Capacity	5.0 kW (5000 W)
Main Circuit Power Input	3-phase 200 to 230 VAC, 50/60 Hz
Control Circuit Power Input	Single-phase 200 to 230 VAC, 50/60 Hz
Rated Output Voltage	3-phase 170 VAC (PWM controlled)
Control Method	Sine-wave PWM control, current control system
Control Interface	Pulse train input / Analog voltage command interface
Dynamic Brake	Built-in
Cooling System	Forced ventilation fan
Ambient Operating Temperature	0 to 55 degC (non-freezing)
Shipping Weight (Calculated)	6.0 kg
Package Dimensions (Calculated)	350 mm x 250 mm x 150 mm

Connections and Interfaces

Terminal / Connector	Functional Assignment
L1, L2, L3	Main circuit power supply input (3-phase AC)
L11, L21	Control circuit power supply input (single-phase AC)
U, V, W	Servo motor power output connection
P, C, D	External regenerative brake resistor interface terminals
CN1	I/O signal connector (analog commands, control signals, pulse input)
CN2	Encoder feedback communication port
CN3	PC setup software (MR Configurator) serial communication port

Empirical Engineering Insights

Alternative Models & Compatibility

When upgrading legacy motion control hardware to newer architectures, the MR-J3-500A can be replaced by the newer MELSERVO-J4 series counterpart (MR-J4-500A). However, this migration requires the use of a conversion cable adapter kit to adapt the older encoder wiring and physical mounting adapters, as the bolt holes differ. Always back up the drive parameters using MR Configurator setup software (version MRZJW3-SETUP221E or later) via the CN3 port prior to removing a faulty unit.

Application Pitfalls & Engineering Notes

At 5.0 kW, the thermal dissipation inside electrical cabinets is substantial. Ensure a minimum clearance of 40 mm above and below the amplifier for airflow. In high-cycle deceleration profiles, the built-in regenerative resistor may saturate, triggering the AL.30 (Regenerative Error) fault. Under these circumstances, you must disconnect the built-in resistor bar between the P and D terminals, and mount an external high-capacity regenerative brake resistor option (such as the MR-RB5E) across the P and C terminals.

Commissioning & Wiring Tips

For absolute positioning configurations, an external battery (MR-J3BAT) must be connected to the dedicated slot on the front of the unit to retain the encoder's multi-turn data during power-off states. Additionally, wire the control circuit power supply (L11/L21) upstream of the main power contactor. This ensures that even when the main three-phase power (L1/L2/L3) is tripped during an E-stop condition, the drive maintains absolute encoder communications and displays active error diagnostics on the built-in LED display.

Installation Guidelines

CRITICAL WARNING

Before performing mounting, wiring, or manual inspection, completely de-energize the incoming three-phase supply lines. After isolating power, wait at least 15 minutes for the internal high-voltage bus capacitors to discharge. Verify that the charge LED indicator on the front panel is completely extinguished before handling any physical terminals or connections.

Mechanical Mounting: Securely install the unit vertically on a flat, vibration-free panel using the rear mounting screws. Ensure the cooling fan airflow is completely unobstructed.

Ground Connection: Establish a robust grounding network by connecting the amplifier protective earth (PE) terminal to the cabinet's main ground bar using a low-impedance copper wire.

Power & Control Connections: Route control circuit (L11/L21) and main circuit (L1/L2/L3) lines separately from the motor power outputs (U/V/W) to minimize electromagnetic interference (EMI). Use shielded twisted-pair cables for signal connections.

Parameter Configuration: Power up the control circuit first, establish serial communication via the CN3 port, and upload/verify operational parameter configurations before enabling the main power input.

Shipping & Returns

Global Express Shipping

Standard Delivery: 4–6 business days via DHL, FedEx, and UPS.
Express Dispatch: Same-day dispatch for in-stock orders placed before 2:00 PM (GMT+8).
Worldwide Coverage: Serving over 150 countries.

Returns & Warranty

30-Day Guarantee: Returns accepted for in-stock products in original, factory-sealed packaging.
12-Month Warranty: Every industrial component is backed by our technical warranty.

FAQ

What is the primary cause of the AL.30 alarm code on this drive, and how is it resolved?

AL.30 indicates a regenerative overvoltage or overload error. This happens when the regenerated energy from a decelerating motor exceeds the absorption capacity of the built-in braking resistor. To fix this, you must disconnect the built-in resistor bar between the P and D terminals, and connect an external high-capacity regenerative option to the P and C terminals.

Which software is used to configure and troubleshoot the MR-J3-500A amplifier?

The amplifier is configured using Mitsubishi Electric's MR Configurator setup software (version MRZJW3-SETUP221E or newer). Connection to a computer is established via the CN3 serial communication interface port.

Does the MR-J3-500A require an external battery for absolute position detection?

Yes. To operate the drive in absolute positioning mode and retain motor position coordinate data through power cycles, you must install an external MR-J3BAT battery into the battery holder on the front of the amplifier.

Can I replace an old MR-J3-500A with a newer MR-J4 model directly?

You can migrate to an MR-J4-500A, but it is not a direct drop-in replacement. You will need to use a Mitsubishi migration adapter bracket to accommodate the different physical mounting footprints, and a conversion cable for the encoder interface, in addition to converting the parameter file.

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