Mitsubishi MR-J3-100A4-RJ070 Servo System: Compact & Safe 400V Drive

Precise control with built-in safety. The Mitsubishi MR-J3-100A4-RJ070 is a 1.0kW servo amplifier system. It operates on 400V AC power and includes the critical Safe Torque Off (STO) safety function.

Key Benefits

• Integrated Safety: Built-in Safe Torque Off (STO) function helps meet machine safety standards.
• High Voltage Ready: Direct 3-phase 400V AC operation simplifies connection to industrial power grids.
• Versatile Control: Supports position, speed, and torque control modes for flexible application use.
• Compact & Efficient: Self-cooled, open design in a lightweight 1.7 kg package saves space.
• Reliable Performance: Operates reliably in ambient temperatures from 0°C to 55°C.

Complete Technical Specifications

Brand: Mitsubishi Electric
Full Model: MR-J3-100A4-RJ070
Series: MELSERVO-J3 Series Servo System
Rated Output Power: 1.0 kW (1000 Watts)
Power Supply: 3-phase 400V AC, 50/60 Hz
Control Modes: Position Control, Speed Control, Torque Control
Safety Function: Safe Torque Off (STO)
Cooling Method: Self-cooled (Natural Convection)
Enclosure Rating: Open Type (IP00)
Operating Temperature: 0°C to +55°C
Weight: 1.7 kg
Communication Interface: RS-422 / SSCNET (typical for A4 series)
Protection Functions: Overcurrent, Overvoltage, Overload (standard for series)
Compatible Motors: Designed for use with Mitsubishi 400V class servo motors.

Installation & Safety Setup

Install the MR-J3-100A4-RJ070 in a clean, dry control cabinet. Connect it directly to a three-phase 400V AC power supply. The STO safety circuit must be wired according to the machine's safety design and relevant regulations (e.g., ISO 13849-1). The self-cooled design requires adequate space around the unit for air circulation. Due to the IP00 rating, the cabinet must provide protection from environmental contaminants.

Expert FAQs

What is the primary purpose of the STO function?
STO is a safety feature that safely disables the motor torque, allowing for maintenance or intervention without unexpected startup, which is required for many modern safety-rated machines.

What does the "A4" and "RJ070" suffix indicate?
"A4" typically denotes a 400V class amplifier. "RJ070" often specifies a particular regenerative braking resistor or a regional product variant. Check datasheets for exact details.

Can this drive be used in a cabinet without a cooling fan?
Yes, its self-cooled (fanless) design is sufficient for its 1kW rating, provided the ambient temperature does not exceed 55°C and there is natural airflow.

Is this system a single unit or separate components?
The model number suggests it is a complete servo system package, typically including the amplifier and possibly a matched servo motor. Confirm the exact contents from the supplier.

Who is this system ideal for?
It is perfect for medium-duty automation equipment on 400V networks where functional safety compliance is needed, such as packaging machines, conveyor systems, or automated assembly stations.

Package & Warranty Information

Package Includes:
1 x MR-J3-100A4-RJ070 Servo System (Amplifier & possibly motor - confirm configuration)
1 x Instruction & Safety Manual

Warranty: Protected by a standard 12-month warranty.

Shipping: Delivered via FedEx, UPS, or DHL for fast international delivery.

© 2025 Ubest Automation Limited. All rights reserved.
Original Source: https://www.ubestplc.com/
Contact: sales@ubestplc.com | Phone: +86 180 3000 5825