Mitsubishi Electric MR-J4-10A MELSERVO-J4 Series 1-Axis Servo Amplifier

Description

Operating on a 200V class supply, the Mitsubishi Electric MR-J4-10A single-axis servo drive is engineered to deliver highly responsive closed-loop motion control for 0.1 kW rotary, linear, and direct-drive motors within the MELSERVO-J4 automation platform. This unit interfaces seamlessly via a general-purpose command interface, accommodating both high-speed pulse train train positioning and analog speed or torque control methods. Equipped with 22-bit high-resolution encoder feedback, it achieves remarkable micro-positioning precision. Its robust diagnostic suite and integrated Safe Torque Off (STO) safety mechanisms ensure high reliability and compliance in demanding industrial system designs.

Key Features

• 22-Bit High-Resolution Feedback: Interfaces directly with high-resolution encoders (4,194,304 pulses/rev) for exceptionally smooth rotation and precise positioning.
• Flexible Input Configuration: Universally supports single-phase or three-phase 200V AC to 240V AC power supply lines.
• General-Purpose Interface: Accommodates pulse train commands up to 4 Mpulses/s (differential receiver) alongside ±10V analog speed and torque commands.
• Advanced Vibration Suppression: Employs adaptive tuning, machine end vibration control, and robust filters to suppress mechanical resonance automatically.
• Integrated Safety Function: Features built-in Safe Torque Off (STO) certified to EN ISO 13849-1 Category 3 PL e and IEC 61508 SIL 3.

Applications

• Semiconductor and liquid crystal assembly machinery.
• High-speed pick-and-place electronic component insertion.
• Precision packaging, labeling, and bottle-capping machines.
• Cartesian coordinate robots and small-scale CNC machining axes.

Technical Specifications

Connections and Interfaces

Alternative Models & Compatibility

The MR-J4-10A features the standard general-purpose analog/pulse interface. It is a direct functional upgrade for legacy MR-J3-10A drives. However, configuration file parameter transfer must be performed via MR Configurator2 to map parameters accurately. Note that the MR-J4-10A is functionally and physically distinct from the MR-J4-10B, which operates exclusively on the high-speed fiber-optic SSCNET III/H network; they cannot be substituted for one another without swapping out the control network hardware.

Application Pitfalls & Engineering Notes

When configuring the MR-J4-10A for single-phase operation, ensure that the power supply wiring is connected to the L1 and L2 terminals. If single-phase power is applied without adjusting the parameter settings to disable three-phase open phase monitoring, the amplifier will trigger an AL 10 (undervoltage) or AL 12 (memory error/phase open) alarm. Proper heat-dissipation clearance must be maintained when mounting adjacent to other units inside dense panels; a minimum distance of 10 mm on either side is recommended for optimal convection cooling.

Commissioning & Wiring Tips

To protect the high-resolution 22-bit absolute feedback signal from electromagnetic interference, always utilize double-shielded, twisted-pair cable for the CN2 encoder interface. Ensure the amplifier's ground terminal is bonded back to the primary electrical panel ground plate via a low-impedance connection. If feedback-line signal errors occur (such as AL 1A or AL 50), verify that the shielding connection at the motor-end connector has not been bypassed, and consider installing a high-performance power line filter on the main AC incoming power line.

Installation Guidelines

1. 1 Mount the servo amplifier vertically on a flat, vibration-free surface inside a metallic, IP54-rated control cabinet to safeguard against dust and oil mist.
2. 2 Wire the incoming 200V power lines to L1, L2, L3 (and L11, L21 control power) using specified wire gauges and short-circuit protection fuses.
3. 3 Connect the U, V, and W motor terminal leads matching phase orientation directly to the servo motor power plug. Never apply commercial power directly to U, V, or W.
4. 4 Attach control inputs to CN1, plug the motor encoder cable into CN2, and insert the STO bypass plug into CN8 if safe torque functions are not used.