Product Overview

The Mitsubishi MR-J4-350B is a servo amplifier from the MELSERVO-J4 series. This amplifier offers precise control for compatible servo motors. Its output power rating is 3.5 kW, making it suitable for demanding motion control applications.

A built-in STO safety feature ensures reliable operation while protecting both users and machinery. The MR-J4-350B comes with an SSCNET III/H interface option for high-speed network communication. Additionally, it supports close mounting to save cabinet space.

General Specifications

The MR-J4-350B delivers robust servo control with comprehensive safety features.

• Manufacturer: Mitsubishi.

• Product Type: Servo Amplifier.

• Product Line: MELSERVO MR-J4.

• Series: MELSERVO-J4.

• Part Number: MR-J4-350B.

• Rated Output Power Capacity: 3.5 kW.

• Weight: 2.32 kg (5.13 lbs).

Control and Safety Features

The MR-J4-350B incorporates advanced control methods and safety functions.

Control Methods:

• Current control method option.

• Sine-wave PWM control method option.

Safety Function:

• STO (Safe Torque Off) per IEC/EN 61800-5-2.

Dynamic Brake:

• Built-in dynamic brake for stable and efficient motor control.

Power Supply Specifications

The MR-J4-350B requires specific power inputs for proper operation.

Main Circuit Power Supply:

• Input Voltage: 200-240V AC (3-Phase).

• Permissible Voltage Fluctuation: 170-264V AC (3-Phase).

• Rated Output Voltage: 170V AC (3-Phase).

• Rated Output Current: 17 Amps.

Control Circuit Power Supply:

• Voltage: 200-240V AC (1-Phase).

• Permissible Voltage Fluctuation: 170-264V AC (1-Phase).

Frequency: 50/60 Hz for both main and control circuits.

Interface Options

The MR-J4-350B includes an SSCNET III/H interface option. Therefore, it supports high-speed, real-time motion control communication. This interface is ideal for multi-axis synchronization applications.

Protective Functions

The MR-J4-350B includes several protective functions that can shut the system down. These protect against:

• Overvoltage errors.

• Overcurrent errors.

• Servo motor overheating errors.

Consequently, both the amplifier and the connected motor are safeguarded from damage.

Physical Dimensions

The MR-J4-350B has a compact design optimized for easy installation.

• Width: 90 mm.

• Height: 168 mm.

• Depth: 195 mm.

• Weight: 2.3 kg.

Installation Features

The MR-J4-350B supports close mounting. This allows multiple amplifiers to be mounted side by side without excessive spacing. As a result, cabinet space is saved, and control panel density is increased.

Standards Compliance

The MR-J4-350B complies with several international industrial standards. These include:

• CE standards.

• UL standards.

Consequently, the amplifier is approved for use in global markets.

Key Features

The MR-J4-350B offers several advantages for motion control applications.

3.5 kW Output Power:
Provides ample power for demanding servo motor applications. Therefore, it suits medium to high-power axes.

SSCNET III/H Interface:
Enables high-speed real-time communication. Hence, multi-axis synchronization is precise and reliable.

Built-in STO Safety:
Meets IEC/EN 61800-5-2 standards for safe torque off. Thus, user and machinery protection are enhanced.

Built-in Dynamic Brake:
Provides stable and efficient motor stopping. Consequently, controlled deceleration is achieved without external components.

Close Mounting Capability:
Allows side-by-side installation of multiple amplifiers. As a result, cabinet space is optimized.

Comprehensive Protective Functions:
Shuts down the system during overvoltage, overcurrent, or motor overheating. Therefore, system reliability is improved.

Wide Input Voltage Tolerance:
Main circuit accepts 170-264V AC (3-phase). Control circuit accepts 170-264V AC (1-phase). Hence, the amplifier tolerates typical power fluctuations.

Compact Dimensions:
Measures only 90 mm wide, 168 mm high, and 195 mm deep. Thus, it fits in tight control cabinets.

Typical Applications

The MR-J4-350B suits a wide range of motion control applications.

• CNC machine tool servo axes.

• Robotics joint control.

• Packaging machinery servo drives.

• Printing press registration control.

• Assembly line positioning systems.

Installation Guidelines

Install the MR-J4-350B in a well-ventilated control cabinet. Maintain the close mounting spacing as specified in the manual. Connect the 3-phase main circuit power supply (200-240V AC) to the appropriate terminals. Then, connect the 1-phase control circuit power supply (200-240V AC) to the control terminals.

Next, connect the servo motor to the output terminals. The rated output voltage is 170V AC (3-phase) at 17 Amps. After that, connect the SSCNET III/H network cable to the interface port. Finally, configure the amplifier parameters using Mitsubishi setup software. The built-in STO function must be wired according to safety standards.

What is in the Box

Please inspect all items upon delivery.

• Mitsubishi MR-J4-350B servo amplifier.

• Built-in dynamic brake (integrated).

• Installation instruction manual.

• Safety function wiring guide.

Frequently Asked Questions (FAQ)

1. What is the output power rating of the MR-J4-350B?

The MR-J4-350B has a rated output power capacity of 3.5 kW. This makes it suitable for medium to high-power servo motor applications.

2. What safety function does this servo amplifier include?

The MR-J4-350B includes a built-in STO (Safe Torque Off) function per IEC/EN 61800-5-2. This enhances both user and machinery safety.

3. What type of communication interface does this amplifier use?

The MR-J4-350B comes with an SSCNET III/H interface option. Consequently, it supports high-speed real-time motion control communication.

4. Can this amplifier be mounted close to other amplifiers?

Yes. The MR-J4-350B supports close mounting. Therefore, multiple amplifiers can be installed side by side without excessive spacing.

5. What protective functions are built into this device?

The MR-J4-350B includes protection against overvoltage errors, overcurrent errors, and servo motor overheating errors. Accordingly, the system shuts down to prevent damage.