Description
The Mitsubishi MR-J3-70A is a 750W (0.75 kW) general-purpose AC servo drive from the MELSERVO-J3 series, designed for high-performance position, speed, and torque control in industrial automation. This drive supports single-phase or three-phase AC 200-230V input and delivers precise motion control with a rated current of approximately 5.8A. It features pulse train input for position control (up to 1 Mpps differential / 200 kpps open-collector) and analog ±10V input for speed/torque control. With built-in RS-422 communication and optional CC-Link / SSCNET III network expansion, the MR-J3-70A integrates seamlessly with Mitsubishi PLCs and motion controllers. It is commonly paired with 750W-class Mitsubishi servo motors such as HF-KP73, HF-MP73, HG-SR72, or HC-UP72.
Key Features
- Rated Power: 750W (0.75 kW)
- Rated Current: ~ 5.8 A
- Input Power: Single-phase or Three-phase AC 200-230V, 50/60 Hz
- Control Modes: Position (pulse train), Speed (analog), Torque (analog)
- Pulse Train Input: 1 Mpps (differential), 200 kpps (open-collector)
- Analog Input: ±10V DC for speed/torque command
- Encoder Feedback: Supports 18-bit absolute encoder (262,144 ppr)
- Communication: RS-422 standard; optional CC-Link, SSCNET III
- Dynamic Brake: Built-in
- Country of Origin: Japan
Technical Specifications
Parameter | Specification |
|---|---|
Model | MR-J3-70A (MELSERVO-J3 Series) |
Rated Power | 750 W (0.75 kW) |
Rated Current | ~ 5.8 A |
Main Circuit Power | Single-phase / Three-phase AC 200-230V, 50/60 Hz |
Control Circuit Power | Single-phase AC 200-230V, 50/60 Hz |
Interface Power | DC 24V (for I/O signals) |
Control Method | Sine-wave PWM drive, current control |
Control Modes | Position, Speed, Torque (switchable) |
Position Command | Pulse train (differential: 1 Mpps max; open-collector: 200 kpps max) |
Speed/Torque Command | Analog ±10V DC |
Encoder Support | 18-bit absolute encoder (262,144 ppr) |
Communication Interface | RS-422 (standard); CC-Link, SSCNET III (optional via option card) |
Dynamic Brake | Built-in |
Protection Functions | Overcurrent, overvoltage, undervoltage, overload, regenerative error, encoder error |
Cooling Method | Forced air cooling (internal fan) |
Mounting | Panel mount (IP20) |
Dimensions (W×H×D) | ~ 74 mm × 165 mm × 185 mm (approx. — check manual) |
Weight | ~ 1.5 kg |
Operating Environment | 0 to +55 °C, 20 to 80% RH (non-condensing) |
Standards | CE, UL, cUL, RoHS |
Warranty & After-Sales
- Factory new units: 12 months warranty
- Refurbished units: 3-6 months warranty (load test + encoder feedback verification)
- Technical support for:
- Parameter configuration (MR-Configurator software)
- Motor-drive pairing (HF-KP73, HG-SR72, etc.)
- Pulse train wiring (differential vs open-collector)
- Analog speed/torque control setup
- Alarm code troubleshooting
- Commissioning and diagnostics support available
Delivery Time
- Standard delivery: 3-5 working days
- Express shipping available upon request
Why Choose Our Store
- Genuine Mitsubishi Electric servo drives
- Global supply network with competitive pricing
- Expertise in motion control systems
- Comprehensive technical documentation
- Responsive customer service and support
Applications
- Packaging Machinery: High-speed indexing, filling, and sealing
- Textile Equipment: Spindle and traverse control
- Machine Tools: Axis feed and spindle positioning
- Assembly Lines: Pick-and-place and conveyor synchronization
- Printing & Labeling: Registration mark control
- Robotics: Joint actuation and end-effector positioning
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