Manufacturer: Mitsubishi Electric
Product No.: MR-J4W2-77B
Country of origin:United States
Product Type: Servo Amplifiers
Payment: T/T, Western Union
Weight: 2300g
Dimensions: 250 mm x 150 mm x 220 mm
Shipping port: Xiamen
Warranty: 12 months
Designed for highly synchronized multi-axis motion control, the Mitsubishi Electric MR-J4W2-77B functions as a high-density, 2-axis AC servo amplifier operating within the MELSERVO-J4 platform. By integrating control circuitry for two independent axes into a single physical unit, this amplifier significantly reduces required electrical panel enclosure footprint and streamlines control bus wiring. It communicates natively via the high-speed SSCNET III/H fiber-optic network, enabling real-time, deterministic motion synchronization with motion controllers and Simple Motion modules. The drive features advanced vibration suppression control II and real-time auto-tuning algorithms to optimize mechanical dynamic response and settle times.
| Parameter | Specification Value |
|---|---|
| Manufacturer | Mitsubishi Electric |
| Model Number | MR-J4W2-77B |
| Series | MELSERVO-J4 |
| Number of Controlled Axes | 2 Axes (Axis A and Axis B) |
| Rated Output (Per Axis) | 0.75 kW (Axis A) / 0.75 kW (Axis B) |
| Main Circuit Power Input | 3-phase 200 to 240 V AC, 50/60 Hz |
| Control Circuit Power Input | 1-phase 200 to 240 V AC, 50/60 Hz |
| Communication Interface | SSCNET III/H (High-speed optical network) |
| Control Method | Sinusoidal PWM control, current systematic control |
| Safety Function | Safe Torque Off (STO) via CN8 |
| Ambient Operating Temp. | 0 to 55 degC (non-freezing) |
| Product Dimensions | 168 mm (H) x 85 mm (W) x 195 mm (D) |
| Product Net Weight | 2.3 kg |
| Shipping Weight (Calculated) | 3.0 kg |
| Package Dimensions (Calculated) | 250 mm x 150 mm x 220 mm |
| Country of Origin | Japan |
| Connector/Terminal | Functional Allocation |
|---|---|
| CN1A / CN1B | SSCNET III/H Optical network input/output lines |
| CN2A / CN2B | Encoder communication interface (Axis A / Axis B) |
| CN3 | I/O signal connector (External limit switches, proximity sensors) |
| CN8 | Safe Torque Off (STO) functional circuit connector |
| L1 / L2 / L3 | Main circuit three-phase AC power input terminal block |
| L11 / L21 | Control circuit single-phase AC power input terminal block |
| U / V / W (A & B) | AC Servo motor power output lines for Axis A and Axis B |
When replacing older MR-J3W series multi-axis drives, please note that physical dimensions and parameter formatting differ. The MR-J4W2-77B requires MR-J4 mode configuration parameters and firmware compatibility with the upstream controller (such as Q-series Motion Controllers or Simple Motion Modules). When migrating existing systems, ensure that SSCNET III/H network configuration tools are updated to support the MR-J4 model profiles.
In enclosed panels with limited airflow, the MR-J4W2-77B can experience rapid internal thermal rise. Operating both 0.75 kW axes at high continuous duty cycles simultaneously can trigger a thermal overload alarm (AL 46). Maintaining a 40 mm vertical clearance above/below and a 10 mm lateral clearance is mandatory. If both axes decelerate concurrently under heavy inertial load, verify that the regenerative power does not exceed the internal resistor capacity; install a properly sized external regenerative resistor to prevent overvoltage faults (AL 33).
Always use original Mitsubishi MR-CCN1-type optical cables for the CN1A/CN1B ports. Standard fiber-optic cables have a strict minimum bend radius of 25 mm; violating this threshold will lead to optical attenuation, inducing erratic communication dropouts (AL 86.1). Ensure encoder cables (CN2A/CN2B) are physically routed in separate, shielded cable trays away from the motor power cables (U/V/W) to prevent electromagnetic interference from triggering encoder communication errors (AL 1A).
Mount the amplifier vertically on a flat, rigid metallic backplate using the mounting screws. Maintain standard clearance requirements to optimize cooling convection currents.
Connect the dedicated functional grounding wire to the amplifier ground terminal and verify connection path back to the system ground busbar.
Execute control and encoder wiring, ensuring that the fiber-optic SSCNET connections are fully clicked into position in CN1A/CN1B with the protective caps removed.
Global Express Shipping
Returns & Warranty
Global Express Shipping
Returns & Warranty
Orders are processed and delivered Monday-Friday (excluding public holidays).
For full eligibility, restocking fees, and international return details, please view our official Refund & Return Policy .
| Country of origin |
United States
|
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