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

SKU MR-J2S-350A

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12-month warranty
Free returns within 30 days

Manufacturer: Mitsubishi Electric
Product No.: MR-J2S-350A
Country of origin:United States
Product Type: AC Servo Drives
Payment: T/T, Western Union
Weight: 3500g
Dimensions: 280 x 200 x 130 mm
Shipping port: Xiamen
Warranty: 12 months

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

Manufacturer	Mitsubishi Electric
Model	MR-J2S-350A
Series	MELSERVO-J2S
Control System	Sinusoidal PWM control / current control system
Rated Output Power	3.5 kW
Input Voltage / Phase	3-phase 200-230V AC, 50/60 Hz OR Single-phase 230V AC, 50/60 Hz
Permissible Frequency Fluctuation	Within +/- 5%
Speed Frequency Response	550 Hz or more
Dynamic Brake	Built-in
Cooling Method	Forced ventilation (built-in cooling fan)
Operating Ambient Temperature	0 to 55 degC (non-freezing)
Ambient Humidity	90% RH or less (non-condensing)
Country of Origin	Japan
Shipping Weight (Calculated)	3.5 kg
Package Dimensions (Calculated)	280 x 200 x 130 mm

Connections and Interfaces

Terminal / Port	Function / Circuit Assignment
L1, L2, L3	Main circuit power input (3-phase AC)
L11, L21	Control circuit power input
U, V, W	Servo motor output terminals (Phase matching is critical)
P, Cr	External regenerative resistor connections (Remove jumper across P-D if used)
CN1A / CN1B	I/O signal connector ports for host controller interfacing
CN2	Encoder feedback connector port

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

CRITICAL WARNING: Hazardous voltages remain present within the internal bus capacitors even after the mains power supply is isolated. Wait at least 10 minutes following isolation and confirm that the red "CHARGE" LED on the physical front panel is completely extinguished before removing terminal covers or executing wiring changes.

1

Mount the drive vertically inside an enclosed electrical cabinet. Ensure a minimum spacing clearance of 40 mm on both sides and 100 mm above and below the drive to facilitate unobstructed airflow from the built-in cooling fan.

2

Connect the dedicated PE (protective earth) ground terminal first using a low-impedance copper conductor to mitigate high-frequency electrical noise and protect system electronics.

3

Wire the control circuit power supply to L11 and L21, and the main input circuit power to terminals L1, L2, and L3, ensuring proper sizing of branch circuit protection devices (breakers/fuses).

4

Securely connect the motor phase lines to terminals U, V, and W. Do not reverse these phase outputs as it will result in motor runaway faults and potential physical mechanical damage.

FAQ

Can the MR-J2S-350A drive be powered by a single-phase supply?

Yes, the drive can run on a single-phase 230V AC supply connected to terminals L1 and L2. However, under heavy loads or peak torque demands, a three-phase supply is highly recommended to prevent undervoltage faults.

What is the cause of an AL-30 alarm, and how is it resolved?

AL-30 indicates a regenerative overvoltage fault. This occurs when deceleration energy back-feeds into the drive beyond internal absorption limits. Resolve this by increasing deceleration time or connecting an external regenerative resistor across terminals P and C.

What software is used to configure parameters on this drive?

The Mitsubishi MR Configurator software (such as MR-configurator2 or legacy setups matching the J2S series) is used via a serial connection to upload, modify, and monitor parameter sets.

Are the control interfaces of J2S-A and J2S-B models interchangeable?

No. The MR-J2S-350A features general-purpose pulse-train and analog inputs, while the MR-J2S-350B utilizes the proprietary high-speed SSCNET serial bus communication protocol. They are not interchangeable.

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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, including rapid delivery to Saudi Arabia and UAE.

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 professional technical warranty.

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