Mitsubishi Electric MR-J2S-700B MELSERVO J2S Series AC Servo Amplifier

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Manufacturer: Mitsubishi Electric
Product No.: MR-J2S-700B
Country of origin:United States
Product Type: AC Servo Amplifiers
Payment: T/T, Western Union
Weight: 500g
Shipping port: Xiamen
Warranty: 12 months

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Designed for high-precision motion control, the Mitsubishi Electric MR-J2S-700B AC servo amplifier delivers reliable closed-loop performance within the MELSERVO J2S Series ecosystem. This unit integrates seamlessly with motion controllers via the high-speed SSCNET serial bus interface, providing synchronous control for complex multi-axis industrial machinery.

Key Features

SSCNET Bus Compatibility: Enables high-speed, noise-immune fiber optic communication with motion controllers.
Sinusoidal PWM Control: Optimizes current delivery to the servomotor, reducing torque ripple and heat generation.
Built-In Dynamic Brake: Provides rapid deceleration and emergency stopping capabilities to protect mechanical components.
Comprehensive Protection: Features integrated diagnostics for overcurrent, regeneration overvoltage, overload, and encoder communication faults.
Active Cooling: Equipped with an internal cooling fan to maintain stable operating temperatures under high-duty cycles.

Applications

Multi-axis CNC machining centers and precision metalworking machinery.
Automated packaging systems and high-speed bottling lines.
Semiconductor manufacturing equipment and robotic pick-and-place systems.
Material handling gantries and automated storage/retrieval systems (ASRS).

Technical Specifications

Parameter	Specification
Manufacturer	Mitsubishi Electric
Model Number	MR-J2S-700B
Series	MELSERVO-J2-Super (MELSERVO J2S)
Input Power Supply	3-phase 200-230 VAC, 50/60 Hz
Permissible Voltage Fluctuation	3-phase 170-253 VAC
Permissible Frequency Fluctuation	+/- 5%
Control Method	Sinusoidal PWM control / current control system
Speed Frequency Response	550 Hz or more
Dynamic Brake	Built-in
Enclosure Rating	IP00 (Open type, requires control panel installation)
Cooling Method	Forced fan cooling
Operating Temperature	0 to 55 degC (non-freezing)
Storage Temperature	-20 to 65 degC (non-freezing)
Ambient Humidity	90% RH maximum (non-condensing)
Maximum Elevation	1000m or less above sea level
Vibration Resistance	5.9 m/s sq. maximum
Shipping Weight	8.2 kg

Connections and Interfaces

Terminal / Connector	Function / Assignment
L1 / L2 / L3	3-phase AC main power supply input
L11 / L21	Control circuit power supply input
U / V / W	Servo motor power output connection
CN1A / CN1B	SSCNET bus connection ports (for system daisy-chaining)
CN2	Encoder feedback connection port

Empirical Engineering Insights

Alternative Models & Compatibility

The MR-J2S-700B utilizes the SSCNET protocol, making it incompatible with the analog/pulse-train MR-J2S-700A variant. When replacing older MR-J2-700B units, ensure that the controller firmware supports the updated parameter set of the J2S series.

Application Pitfalls & Engineering Notes

Because this unit is rated IP00, it must be installed in a clean, dust-free control cabinet (IP54 or better). In high-inertia applications, the internal regenerative resistor may overheat. If the amplifier frequently trips on regenerative overvoltage (AL.30) or regenerative overload (AL.37), an external regenerative option must be wired to terminals P and C, with the shorting bar between P and D removed.

Commissioning & Wiring Tips

Always use genuine Mitsubishi fiber optic cables for the CN1A/CN1B ports. Ensure the minimum bending radius of the fiber optic cable is strictly maintained to prevent signal attenuation, which leads to intermittent communication faults (AL.85). Ground the amplifier chassis directly to the main panel backplate using a short, thick braid to minimize high-frequency EMI.

Installation Guidelines

CRITICAL WARNING

Ensure all input power sources (main and control circuits) are completely de-energized before attempting installation, wiring, or maintenance. Wait at least 10 minutes after power-off for the internal bus capacitors to discharge. Verify that the charge lamp on the front face of the amplifier is completely extinguished before touching any terminals.

Mount the servo amplifier vertically on a flat, rigid surface inside the control panel, ensuring adequate clearance around the cooling fan intakes and exhaust ports.

Connect the protective earth (PE) terminal to the system ground before making any other electrical connections.

Wire the main 3-phase power supply to terminals L1, L2, and L3, and the control power supply to L11 and L21.

Connect the motor power cables to terminals U, V, and W, and plug the encoder cable into the CN2 port.

Insert the SSCNET fiber optic cables into CN1A and CN1B, ensuring they click securely into place.

Key Features:

#AC Servo Amplifiers #MELSERVO J2S Series

What is the difference between the MR-J2S-700B and MR-J2S-700A models?

The MR-J2S-700B utilizes the SSCNET high-speed serial bus interface for communication with motion controllers, whereas the MR-J2S-700A is designed for analog input or pulse-train control.

Can the MR-J2S-700B run on single-phase power?

No, this specific 7kW model requires a 3-phase 200-230VAC power supply to meet its rated output and performance specifications.

What should I do if the amplifier displays alarm code AL.30?

AL.30 indicates a regenerative overvoltage fault. Check if the deceleration time is too short, verify the regenerative resistor wiring, or install an external regenerative option if the internal capacity is exceeded.

What type of communication cables are required for the CN1A and CN1B ports?

These ports require specialized SSCNET fiber optic cables. Standard copper patch cables cannot be used, and care must be taken to avoid bending the fiber optic lines beyond their specified minimum radius.

Global Express Shipping

Standard Delivery: 4-6 Business Days via DHL, FedEx, and UPS.
Express Dispatch: Same-day dispatch for in-stock orders placed before 2:00 PM (GMT+8).
Worldwide Coverage: Serving over 150 countries, including rapid delivery to Saudi Arabia and UAE.

Returns & Warranty

30-Day Guarantee: Returns accepted for in-stock products in original, factory-sealed packaging.
12-Month Warranty: Every industrial component is backed by our professional technical 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 .

TECHNICAL SPECIFICATIONS

Country of origin

Mitsubishi Electric MR-J2S-700B MELSERVO J2S Series AC Servo Amplifier