What Is SCADA? Supervisory Control Without Replacing the PLC
SCADA sits above PLCs and RTUs: it acquires field data, alarms operators, and issues supervisory commands across plants and remote assets—without replacing local deterministic control.

Engineered for high-speed, high-precision motion control applications, the MR-J4-100A is a high-performance servo amplifier belonging to the renowned MELSERVO-J4 series. Utilizing a general-purpose interface, this unit facilitates seamless integration using pulse-train and analog voltage command interfaces. It delivers a 1.0 kW rated output, optimized to drive compatible rotary, linear, and direct-drive servo motors with exceptional dynamic response and position accuracy.
This servo amplifier incorporates advanced tuning algorithms, including real-time auto-tuning and advanced vibration suppression control II, minimizing machine resonance and mechanical wear. Designed to operate on a 200V class power input, the MR-J4-100A is highly resilient to voltage fluctuations and guarantees stable operation in demanding automated environments.
| Manufacturer | Mitsubishi Electric |
| Model / Part Number | MR-J4-100A |
| Series Name | MELSERVO-J4 |
| Command Interface | General-purpose (Pulse train / Analog voltage input) |
| Voltage Class | 200 V Class |
| Motor Rated Output | 1.0 kW |
| Output Rated Voltage | Three-phase 170 VAC |
| Output Rated Current | 6.0 A |
| Control Circuit Rated Current | 0.2 A |
| Allowable Frequency Fluctuation | Within ±5% |
| Shipping Weight | 2.5 kg |
| Connector / Terminal | Function Assignment |
|---|---|
| L1, L2, L3 | Main circuit power supply input (3-phase 200-240 VAC) |
| L11, L21 | Control circuit power supply input |
| U, V, W | Servo motor output terminal (three-phase AC to motor) |
| CN1 | I/O signal connector (pulse inputs, analog speed/torque, digital outputs) |
| CN2 | Encoder feedback connector |
| CN3 | Personal computer communication interface (USB for MR Configurator2) |
| CN8 | Safe torque off (STO) safety signal connector |
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| Country of origin |
United States
|