Introduction
The Mitsubishi MR-J5 series represents the latest generation of AC servo amplifiers from Mitsubishi Electric, designed to deliver exceptional performance for industrial automation applications. As part of the MELSERVO-J5 family, these servo drives offer significant advancements over previous generations, including CC-Link IE TSN support, 26-bit encoder resolution, and enhanced safety features. This comprehensive technical guide provides engineers and system integrators with detailed specifications, compatibility analysis, and practical selection criteria for implementing MR-J5 servo systems.
MR-J5 Series Overview
The MR-J5 series encompasses multiple communication interface variants to accommodate diverse industrial network requirements. Each variant is optimized for specific control architectures while maintaining consistent core performance characteristics.
Product Line Variants
- MR-J5-G: CC-Link IE TSN interface with communication cycles from 31.25 μs to 8 ms
- MR-J5-B: SSCNET III/H optical network interface
- MR-J5-A: General-purpose pulse train/analog voltage interface
- MR-J5-G-N1: Multi-network support including EtherCAT and EtherNet/IP
- MR-J5W2-G/W3-G: 2-axis and 3-axis integrated servo amplifiers
- MR-J5D1/D2/D3-G4: Drive units for energy-saving common bus configurations
Technical Specifications Matrix
The following table presents the comprehensive specifications for the 200V class MR-J5-G series servo amplifiers, covering power ratings from 0.1 kW to 7 kW.
| Model | Power (kW) | Rated Current (A) | Max Current (A) | Mass (kg) |
|---|---|---|---|---|
| MR-J5-10G | 0.1 | 1.3 | 4.2 | 0.8 |
| MR-J5-20G | 0.2 | 1.8 | 6.0 | 0.8 |
| MR-J5-40G | 0.4 | 2.8 | 9.2 | 1.0 |
| MR-J5-60G | 0.6 | 3.2 | 10.6 | 1.5 |
| MR-J5-70G | 0.75 | 5.8 | 17.4 | 1.5 |
| MR-J5-100G | 1.0 | 6.0 | 18.0 | 1.6 |
| MR-J5-200G | 2.0 | 11.0 | 33.0 | 2.3 |
| MR-J5-350G | 3.5 | 17.0 | 51.0 | 3.5 |
| MR-J5-500G | 5.0 | 28.0 | 84.0 | 4.8 |
| MR-J5-700G | 7.0 | 37.0 | 111.0 | 6.5 |
Power Supply Specifications
| Parameter | Specification |
|---|---|
| Main Circuit Input Voltage | 3-phase or 1-phase 200V AC to 240V AC (50/60 Hz) |
| DC Input Range | 283V DC to 340V DC |
| Permissible Voltage Fluctuation | ±5% maximum |
| Control Circuit Power | 24V DC ±10% |
| Interface Power Supply | 24V DC (0.3A including CN8 connector signals) |
| Control Method | Sine-wave PWM control / Current control method |
Performance Characteristics
| Feature | MR-J4 Series | MR-J5 Series |
|---|---|---|
| Encoder Resolution | 22 bits | 26 bits (67,108,864 pulses/rev) |
| Speed Frequency Response | 2.5 kHz | 3.5 kHz |
| Minimum Command Communication Cycle | 0.5 ms | 31.25 μs |
| Operating Ambient Temperature | 55°C | 60°C |
| Machine Diagnosis | Ball screw only | Ball screw / Gear / Belt |
| Open Phase Detection | Not provided | Main circuit input / Motor output |
Network Communication Options
CC-Link IE TSN (MR-J5-G)
The MR-J5-G series supports CC-Link IE TSN Class B and Class A, enabling high-speed synchronized communication across industrial networks. Key specifications include:
- Communication Cycles: 31.25 μs, 62.5 μs, 125 μs, 250 μs, 500 μs, 1 ms to 8 ms (22 selectable options)
- Protocol Versions: 1.0 and 2.0
- Network Speed: 1 Gbps
- CiA 402 Drive Profile: Supports profile position, velocity, and torque modes
EtherCAT and EtherNet/IP (MR-J5-G-N1)
The N1 variant expands network compatibility with additional industrial Ethernet protocols:
- EtherCAT: CANopen over EtherCAT (CoE) with cycles from 125 μs to 8 ms
- EtherNet/IP: Adapter and Explicit Messaging support
- Control Modes: Cyclic synchronous position (CSP), velocity (CSV), and torque (CST)
Compatibility Analysis
Compatible Servo Motors
The MR-J5 series is compatible with the entire range of MELSERVO-J5 rotary servo motors, including:
- HK-KT Series: Medium inertia, low capacity (50W to 5kW)
- HK-ST Series: Low inertia, high speed (50W to 5kW)
- HK-MT Series: Flat servo motors
- HK-RT Series: Rotary servo motors with key and tap
- HG-RN Series: Low inertia, rotary servo motors
Backward Compatibility
One of the most significant improvements in the MR-J5 series is the enhanced motor compatibility. Unlike previous generations where amplifier capacity typically matched motor capacity, the MR-J5 supports a broader range of motor combinations. For example, a 400W amplifier can drive motors from 50W to 400W, providing greater flexibility in system design and spare parts management.
Linear and Direct Drive Motors
The MR-J5 series also supports linear servo motors (LM-H3, LM-F, LM-K2, LM-U2, LM-AJ, LM-AU) and direct drive motors (TM-RG2M, TM-RU2M, TM-RFM), enabling solutions for linear motion and high-torque positioning applications.
Advanced Functions
Machine Diagnosis and Predictive Maintenance
The MR-J5 series features comprehensive machine diagnosis functions that detect degradation of drive components over time:
- Ball Screw Diagnosis: Early detection of ball screw wear patterns
- Gear Diagnosis: Monitoring of gear train condition
- Belt Diagnosis: Assessment of timing belt tension and wear
- Open Phase Detection: Main circuit input and motor output phase monitoring
- Encoder Communication Circuit: Detection of encoder communication faults
Tuning and Optimization
Quick tuning functionality enables rapid commissioning by automatically suppressing vibration and overshoot. The adaptive filter II and robust filter features continuously adjust servo parameters to maintain optimal performance despite changing load conditions.
Drive Recorder Function
Built-in data logging captures operational data for troubleshooting and performance analysis, reducing diagnostic time during maintenance operations.
Safety Features
Functional Safety
The MR-J5 series supports comprehensive safety sub-functions compliant with IEC 61508 SIL 3 and EN ISO 13849-1 PLe:
| Safety Function | Description |
|---|---|
| STO | Safe Torque Off |
| SS1 | Safe Stop 1 |
| SS2 | Safe Stop 2 |
| SOS | Safe Operating Stop |
| SBC | Safe Brake Control |
| SLS | Safely Limited Speed |
| SSM | Safe Speed Monitor |
| SDI | Safe Direction |
| SLI | Safe Limited Increment |
| SLT | Safe Limited Torque |
Safety Performance Specifications
| Parameter | Value |
|---|---|
| MTTFd | ≥ 100 years |
| DC | ≥ 90% |
| PFH | < 1.0 × 10⁻⁸ |
| Mission Time (TM) | 20 years |
Application Scenarios
High-Speed Packaging Machinery
With command communication cycles as low as 31.25 μs and 3.5 kHz speed frequency response, the MR-J5 excels in high-speed packaging applications requiring precise motion coordination. The CC-Link IE TSN network enables synchronized multi-axis control essential for pick-and-place operations and rotary packaging systems.
CNC Machine Tools
The 26-bit encoder resolution provides exceptional positioning accuracy suitable for CNC machining applications. Fully closed-loop control support allows integration with linear scales for direct position feedback, eliminating mechanical transmission errors.
Electronic Assembly
Compact servo amplifiers with IP20 rating and the MR-J5W multi-axis variants enable space-efficient designs for electronic assembly equipment. Low cogging torque servo motors ensure smooth motion critical for precision component placement.
Robotic Applications
The MR-J5D drive units combined with the MR-CV power regeneration converter create energy-efficient servo systems ideal for articulated robots. Common bus configuration allows regenerative energy from one axis to power others, reducing overall system power consumption.
Comparison with Alternative Models
When selecting a servo drive system, engineers should consider the following comparison with competing solutions:
| Feature | MR-J5-G | Yaskawa Sigma-7 | Siemens SINAMICS S210 |
|---|---|---|---|
| Encoder Resolution | 26-bit | 24-bit | 22-bit |
| Speed Response | 3.5 kHz | 3.2 kHz | 2.0 kHz |
| Min. Communication Cycle | 31.25 μs | 125 μs | 500 μs |
| Network Support | CC-Link IE TSN, EtherCAT, EtherNet/IP | Mechatrolink III, EtherCAT | PROFINET |
| Safety Certification | SIL 3, PLe | SIL 3, PLe | SIL 3, PLe |
| Machine Diagnosis | Ball screw, gear, belt | Ball screw | Limited |
| Operating Temperature | 60°C | 55°C | 50°C |
Selection Guide and Purchase Recommendations
Step 1: Determine Power Requirements
Calculate the required servo amplifier power based on your motor specifications and application demands. Consider both continuous and peak torque requirements, ensuring the amplifier can deliver 300-450% peak current for dynamic loads.
Step 2: Select Network Interface
- CC-Link IE TSN (MR-J5-G): Best for new Mitsubishi-based systems requiring high-speed synchronization
- EtherCAT (MR-J5-G-N1): Ideal for European automation architectures using Beckhoff or similar controllers
- SSCNET III/H (MR-J5-B): Recommended for existing Mitsubishi motion control systems
- Pulse/Analog (MR-J5-A): Suitable for legacy systems or simple point-to-point positioning
Step 3: Consider System Architecture
For multi-axis applications, evaluate whether multi-axis amplifiers (MR-J5W2/W3) or drive units (MR-J5D) provide better value. Multi-axis amplifiers reduce cabinet space and simplify wiring, while drive units enable energy recovery through common bus configurations.
Step 4: Safety Integration
Determine required safety functions based on machine risk assessment. The MR-J5-G-HS variant offers enhanced safety sub-functions including SS1, SS2, SOS, and SLS for applications requiring advanced safety monitoring.
Step 5: Maintenance and Support
Consider long-term maintenance requirements including firmware update support, spare parts availability, and local technical support. The MR-J5 series benefits from Mitsubishi Electric’s global service network and standardized MR Configurator2 commissioning software.
Conclusion
The Mitsubishi MR-J5 series sets a new benchmark for industrial servo amplifiers with its exceptional performance specifications, flexible network options, and comprehensive safety features. The 26-bit encoder resolution, 3.5 kHz speed response, and sub-microsecond communication cycles make it suitable for the most demanding motion control applications. Combined with advanced machine diagnosis capabilities and backward compatibility with motor selections, the MR-J5 provides a future-proof solution for industrial automation systems requiring precision, reliability, and energy efficiency.
For system integrators and machine builders evaluating servo solutions, the MR-J5 series represents Mitsubishi Electric’s commitment to delivering total drive solutions that maximize machine and system performance while simplifying integration and maintenance workflows.