Overview
The Mitsubishi MR-JN-40A is an AC motion servo amplifier from the MELSERVO JN series, designed for general-purpose servo motor control in industrial automation and motion control applications. This compact 400W (0.4 kW) rated output amplifier integrates both dynamic braking and a built-in regenerative resistor for efficient energy management and smooth deceleration control.
Key Features
- Rated Output: 400W (0.4 kW) with 2.8A nominal current
- Single-Phase Input: 200–230VAC (200V class), 50/60 Hz compatible
- Built-In Dynamic Brake & Regenerative Resistor: Enables fast motor stopping and energy recovery without external components
- Advanced Control Methods: Sine-wave PWM control with current control method; supports point table and program methods
- Comprehensive Protection: Overcurrent shut-off, regenerative overvoltage protection, electronic thermal overload, servo motor overheat protection, encoder fault detection, and sudden power-outage protection
- IP20 Rating: Suitable for industrial control cabinet mounting with adequate cooling
Technical Specifications
- Output Voltage: 3-phase 170VAC (servo motor supply)
- Rated Current (Output): 2.8A
- Input Voltage: 200–230VAC, single-phase (2P)
- Input Frequency: 50/60 Hz
- Operating Temperature: 0°C to +55°C ambient
- Control Method: Sine-wave PWM/current control with point table or program mode
- Interface Power Supply: 24 VDC ± 10% (0.3 A required capacity)
- Maximum Input Pulse Frequency: 4 Mpulses/s (differential), 200 kpulses/s (open-collector)
- Digital I/O: 6 x 24 VDC digital inputs (sink/source); 1 x relay output
- Enclosure: IP20
- Series: MELSERVO JN
Typical Applications
The MR-JN-40A servo amplifier is widely used in:
- Precision positioning machines and assembly equipment
- Material handling and conveyor systems requiring synchronized servo control
- Injection molding machine servo drives
- CNC machines and spindle drive systems
- Textile and packaging machinery
- Test and measurement equipment requiring smooth velocity and position control
Compatibility & Replacements
Compatible With
- Mitsubishi MELSERVO JN series rotary servo motors
- Position, speed, and torque control modes
- PLC controllers with pulse train or analog control signals (RS-422/RS-485 compatible)
- 24 VDC control logic systems
Replaces / Drop-In Replacement For
Verify compatibility with your system integrator before ordering. The MR-JN-40A is a member of the MELSERVO JN series and may replace earlier JN-series models in some applications; consult application notes to confirm direct compatibility.
Works With
- Mitsubishi MR Configurator 2 software for parameter setup and tuning
- Pulse train and analog voltage command interfaces
- RS-422/RS-485 communication protocols
- 24 VDC digital input/output control signals
- External 24 VDC control power supplies
