Mitsubishi Electric MR-J2S-350A MELSERVO-J2S AC Servo Drive

Description

Executing high-precision closed-loop motion control, the Mitsubishi Electric MR-J2S-350A is a high-performance AC servo drive engineered for demanding industrial positioning applications. This 3.5 kW capacity drive operates within the renowned MELSERVO-J2S series, utilizing advanced sinusoidal PWM control with current loop integration to ensure exceptionally smooth motor rotation even at low speeds. Compatible with both three-phase 200V AC and single-phase 230V AC input configurations, this unit serves as a critical component in machine tool feed drives, automated packaging lines, and multi-axis Cartesian systems.

Features

• High-resolution encoder feedback interface supporting absolute and incremental configurations.
• Real-time adaptive tuning that dynamically matches changing load inertia for optimal stability.
• Integrated dynamic brake for rapid deceleration and emergency stop execution.
• High-speed response frequency performance exceeding 550 Hz to handle rapid-cycle dynamics.
• RS-232C and RS-422 serial interfaces facilitating multi-drop monitoring and setup diagnostics.

Applications

• Heavy-duty packaging machinery and vertical form-fill-seal (VFFS) systems.
• CNC machine tool feed axes and high-speed indexing tables.
• Multi-axis gantry robots and material handling transfer lines.
• Precision rotary printing presses and web tension control systems.

Technical Specifications

Connections and Interfaces

Empirical Engineering Insights

Alternative Models & Compatibility

The MELSERVO-J2S series is a legacy standard. When migrating legacy systems to newer architectures (such as the MR-J4 or MR-J5 series), dynamic parameter conversion and specialized terminal adapter modules are required. Ensure any replaced units match the correct physical suffix (e.g., "-A" for general-purpose analog/pulse train, or "-B" for SSCNET bus networks) as their control boards are completely non-interchangeable.

Application Pitfalls & Engineering Notes

Under heavy, high-inertia duty cycles, the MR-J2S-350A is prone to AL-30 (Regenerative Error) or AL-32 (Overvoltage) faults. If these faults persist during rapid deceleration ramps, the built-in regenerative capacity has been exceeded. Resolving this requires installation of an external, high-wattage regenerative resistor across terminals P and C, with the factory jumper between P and D removed in the software parameters.

Commissioning & Wiring Tips

Always route high-voltage motor output cables (U, V, W) in separate conduits away from sensitive low-voltage I/O cables (CN1A/CN1B) and encoder lines (CN2). Unshielded parallel routing is a primary cause of position deviation errors and signal noise. Ensure control circuit power (L11, L21) is energized prior to or simultaneously with main power (L1, L2, L3) to allow the control CPU to initialize phase-loss diagnostics correctly.

Installation Guidelines