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MR-J2M-P8B

The MR-J2M-P8B is a compact servo amplifier from Mitsubishi Electric’s MR-J2M series, designed for pulse train input-based positioning control. It supports 8-axis synchronous operation (via cascading) and is widely used in high-precision motion control applications.

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Key Features & Specifications
1. General Specifications
Model: MR-J2M-P8B

Control Method: Pulse train input (differential or open-collector)

Input Modes: CW/CCW, Pulse + Direction, A/B Phase

Max. Input Pulse Frequency: 500 kHz (differential), 200 kHz (open-collector)

Power Supply: 3-phase 200-230V AC (50/60 Hz)

Rated Output: 0.4 kW (400W)

Compatible Motors: HC-MF, HC-SF, HC-RF series (Mitsubishi servo motors)

2. Performance & Functions
Positioning Control: PTP (Point-to-Point), JOG, Homing

Feedback Resolution: 131,072 pulses/rev (17-bit encoder)

Regenerative Braking: Built-in (external resistor optional for high loads)

Protection Functions: Overcurrent, overload, overspeed, encoder error

3. Communication & Expansion
Cascading Capability: Up to 8 axes (via MR-J2M-BU6 buffer units)

I/O Signals:

Digital Inputs: Servo ON (SON), Alarm Reset (RES), Limit Switches (P-OT/N-OT)

Digital Outputs: Servo Ready (RD), Alarm (ALM), In-Position (INP)

Optional Modules: MR-J2M-BU6 (buffer unit), MR-J2M-CN1 (connector kit)

4. Environmental & Mechanical Specs
Operating Temperature: 0°C to 55°C

Storage Temperature: -15°C to 70°C

Humidity: 20-80% RH (non-condensing)

Vibration Resistance: 4.9 m/s² (5-55Hz)

Protection Class: IP20 (indoor use)