MR-J3-100A MITSUBISHI

MR-J3-100A MITSUBISHI Basis unit

Product  Description：

The Mitsubishi Electric Base Unit, often referred to as a Main Base or Backplane, serves as the physical and electrical foundation of the MELSEC PLC system. Its primary role is to provide a mounting platform for the Power Supply module, the CPU, and various I/O or functional modules. Beyond physical support, the Base Unit facilitates high-speed data communication via an internal bus and distributes the necessary operating voltages from the power supply to every connected component in the rack.

Product Parameters

Technical specifications for Base Units are centered around capacity and electrical integrity:

• Number of Slots: Available in various configurations typically offering 2, 3, 5, 8, or 12 slots for mounting modules.

• Extension Capability: Features dedicated connectors for extension cables, allowing the connection of multiple Extension Base Units to a single CPU.

• Internal Bus Speed: Optimized for high-speed parallel or serial data transmission, supporting the rapid cycle times of modern iQ-R or Q series CPUs.

• Power Consumption: Low internal resistance to minimize voltage drops, with internal current consumption usually rated around 0.1A to 0.2A.

• Installation Method: Designed for standard DIN rail mounting or direct screw mounting to a control panel backplate.

• Operating Environment: Rated for standard industrial conditions, typically withstanding temperatures from 0 to 55 degrees Celsius and non-condensing humidity.

Product Advantages

The design of the Mitsubishi Base Unit provides several critical benefits for industrial automation:

• High Structural Rigidity: Built to withstand the vibrations and shocks common in industrial environments, ensuring that modules remain securely seated and electronically connected.

• Seamless Communication: The high-quality gold-plated connectors on the internal bus ensure low-resistance data paths, which is essential for maintaining signal integrity at high processing speeds.

• Flexible System Expansion: The modular nature allows engineers to start with a small base and expand the system using extension bases as the complexity of the project grows.

• Ease of Maintenance: Modules can be easily inserted or removed via a simple hook-and-lock mechanism, which simplifies the replacement of parts and reduces machine downtime.

• Integrated Grounding: The base unit includes a built-in grounding plate that ensures all mounted modules share a common reference point, significantly reducing electrical noise.

Product Applications

Base Units are used in every scenario where a Mitsubishi PLC is deployed:

• Centralized Control Cabinets: Acting as the main hub for factory-wide automation systems where the CPU and main power supply reside.

• Distributed I/O Stations: Used as extension bases in remote locations of a factory to house I/O modules closer to the actual machinery.

• Motion Control Racks: Providing the stable platform required for high-speed motion CPUs and multi-axis positioning modules.

• CNC Machine Integration: Serving as the hardware backbone for logic control within sophisticated metalworking and milling centers.

• Infrastructure Control: Used in environmental monitoring and power management systems where high reliability and long-term uptime are required.

Important Precautions

To ensure the safety and longevity of the PLC system, users must adhere to these precautions:

• Power-Off Installation: You must turn off the main power supply before mounting or removing the Base Unit or any modules. Failure to do so can result in electrical arcing that damages the sensitive bus connectors.

• Mounting Orientation: The Base Unit should always be mounted vertically to allow for proper natural convection and heat dissipation from the installed modules.

• Slot Protection: Use blank cover modules for any empty slots on the base unit. This prevents dust, metal filings, or other conductive contaminants from entering the internal bus connectors.

• Avoid Mechanical Stress: When attaching extension cables, ensure the cables are secured and not pulling on the base unit connectors. Excessive tension can cause intermittent connection failures.

• Grounding Requirements: The grounding terminal on the Base Unit must be connected to a dedicated functional ground using a wire with a cross-section of at least 2 square millimeters to prevent logic errors caused by static or EMI.

The structure and details of the product：

Our services：

Shipping Port:  China

Payment: Bank of Chicago, Bank of Singapore

Express cooperation: fedex, DHL, UPS and your express account

Service: Professional Sales provides 24 hours /7 days online service

Warranty: one year

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