Manufacturer: Mitsubishi Electric
Product No.: MR-J4-70B-EB
Country of origin:United States
Product Type: Servo Amplifiers
Payment: T/T, Western Union
Weight: 3000g
Shipping port: Xiamen
Warranty: 12 months
Designed to meet high-performance motion requirements in automated industrial systems, the Mitsubishi Electric MR-J4-70B-EB AC servo amplifier delivers precise torque, speed, and positioning control. Operating within the high-speed MELSERVO-J4 ecosystem, this unit is engineered for systems requiring synchronized multi-axis control over the high-speed SSCNET III/H fiber optic motion network. With a rated output of 0.75 kW (750 Watts), it provides high-frequency response and robust thermal efficiency under demanding heavy-duty operating cycles.
| Parameter | Value |
|---|---|
| Manufacturer | Mitsubishi Electric |
| Model Identifier | MR-J4-70B-EB |
| Product Series | MELSERVO-J4 |
| Output Rating | 0.75 kW (750 W) |
| Input Power Supply Voltage | 1-phase or 3-phase 200 V AC to 240 V AC, 50/60 Hz |
| Control Communication Interface | SSCNET III/H (Optical Communication) |
| Interface Power Supply | 24 V DC (tolerance limits: +/-10%, required current: 0.3 A) |
| Cooling Type | Force cooling |
| Ingress Protection Rating | IP20 (open structure) |
| Net Weight | 1.4 kg |
| Shipping Weight (Calculated) | 3.0 kg |
| Connector Code | Function / Connection Assignment |
|---|---|
| CN1 | Digital Input / Output signals |
| CN2 | Load-side feedback encoder interface (High-speed serial) |
| CN3 | Personal Computer Configuration Interface (USB port) |
| CN8 | Safe Torque Off (STO) integrated functional safety connections |
| CN1A / CN1B | SSCNET III/H Optical Fiber Network Inbound / Outbound Links |
The MR-J4-70B-EB serves as a direct upgrade to previous generation MELSERVO units. When migrating a system configured with MR-J3-70B components to the MR-J4 series, confirm configuration parameter mappings in MT Developer2. Note that while SSCNET III/H optic fiber cables are physically identical, parameter setups differ in scan rate cycles. Check firmware versions if matching older controller units.
To prevent thermal degradation within high-density control enclosures, maintain a clear ventilation space of at least 50 mm above and below the amplifier frame. Close-mounting multiple MR-J4 modules requires dynamic derating or the installation of auxiliary cabinet circulation fans, as ambient temperatures exceeding 55 Celsius inside the enclosure can trigger protective overtemperature faults.
Optical communication cables (MR-J3BUS lines) are highly sensitive to sharp physical bends. Maintain a minimum bending radius of at least 25 mm when routing fibers inside wire ducts to prevent signal loss faults (indicated by communication error codes such as AL.37). Ensure that the 24 V DC auxiliary interface power supply maintains a stable voltage within its 10% tolerance limit during peak brake activation periods.
Isolate and lock out all AC input power before initiating installation, removal, or terminal wiring of the servo amplifier. Wait at least 15 minutes after power-down to allow internal high-voltage storage capacitors to fully discharge. Always verify the DC bus voltage across terminals L+ and L- is below safe thresholds with a digital multimeter before contacting terminals.
Mount the amplifier vertically on a flat, rigid metal surface inside your enclosure to maximize heat dissipation through the integrated heat sink.
Connect the protective earth (PE) grounding conductor directly to the dedicated ground terminal on the chassis before executing other wiring phases.
Terminate the AC power supply lines to terminals L1, L2, and L3 (three-phase setups) or correct single-phase configuration layout terminals as detailed in the technical manual.
Connect the high-speed fiber optic cables to optical ports CN1A and CN1B, ensuring complete insertion until a positive physical click lock is felt.
Global Express Shipping
Returns & Warranty
Orders are processed and delivered Monday-Friday (excluding public holidays).
For full eligibility, restocking fees, and international return details, please view our official Refund & Return Policy .
| Country of origin |
United States
|
This article explains how integrated electric actuators, such as SMC’s e-Actuator series, are transforming industrial motion control by replacing traditional pneumatic and hydraulic systems. It...
This article explains how PLC systems perform core mathematical operations such as addition, subtraction, multiplication, division, modulo, and exponentiation within industrial automation. It shows...
The article explains several advanced Boolean logic functions used in PLC programming beyond basic AND, OR, and NOT operations. It covers how tools like truth tables, multiplexers, pulse generators,...
Boolean logic is the foundation of every PLC program. From simple machine controls to complex industrial automation systems, logic gates determine how controllers respond to changing inputs and...
Industrial firewalls play a critical role in OT cybersecurity, protecting PLC, DCS, and SCADA networks through segmentation, ingress/egress control, and IDS/IPS integration aligned with IEC 62443...
Modern robotic grippers are evolving beyond traditional mechanical jaws. From gecko-inspired adhesive systems and soft food-grade grippers to AI-powered warehouse tools, advanced gripping...
