Q3MEM-4MBS-SET MITSUBISHI

Q3MEM-4MBS-SET MITSUBISHI Basis unit

Product  Description：

The Mitsubishi Electric Base Unit, commonly referred to as a Main Base or Backplane, serves as the physical and electrical foundation of a MELSEC Programmable Logic Controller system. Its primary role is to provide the communication bus and power distribution network that links the Power Supply module, the CPU, and various I/O or functional modules together. By establishing a rigid framework for hardware integration, the base unit ensures that all components operate as a single, synchronized system.

Product Parameters

The technical characteristics of a Mitsubishi Base Unit are defined by its capacity for expansion and its electrical integrity:

• Module Slots: Available in various configurations typically supporting 3, 5, 8, or 12 slots for mounting I/O and functional modules.

• Extension Capability: Equipped with extension cable connectors that allow the main base to link with multiple extension base units for high-density systems.

• Bus Specification: Utilizes high-speed parallel or serial bus technology (depending on the series, such as iQ-R or Q) for rapid data exchange between the CPU and modules.

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

• Operating Environment: Rated for industrial temperatures usually ranging from 0 to 55 degrees Celsius and a humidity range of 5 to 95 percent non-condensing.

• Dielectric Withstand Voltage: Tested to handle AC 1500V for one minute between the power terminals and the ground to ensure structural safety.

Product Advantages

Mitsubishi Base Units offer several critical benefits for industrial automation architecture:

• High Structural Rigidity: Engineered to withstand the vibrations and mechanical stresses common in factory environments, ensuring that modules remain securely connected.

• Efficient Power Distribution: Features a robust internal bus that delivers stable DC power from the Power Supply module to every connected component with minimal voltage drop.

• Simplified Maintenance: The "plug-and-play" nature of the base unit allows modules to be replaced quickly without the need to rewire the entire system.

• Superior Noise Immunity: The internal bus is shielded against electromagnetic interference, preventing data corruption during high-speed communication between the CPU and I/O.

• Future-Proof Scalability: Users can start with a small base unit and easily expand the system using extension cables and additional bases as production requirements grow.

Product Applications

The base unit is the essential starting point for any automation project using Mitsubishi hardware:

• Centralized Control Cabinets: Acting as the core assembly for PLCs managing entire production lines or complex machine tools.

• Distributed Control Systems: Used as remote I/O stations where an extension base unit is placed near field sensors and connected back to the main CPU via extension cables.

• Motion Control Racks: Providing the high-speed backplane necessary for Multiple-CPU systems where logic and motion CPUs must share data instantaneously.

• HVAC and Building Management: Serving as the mounting platform for controllers that manage large-scale air conditioning, lighting, and safety systems.

• Modular Machinery: Integrated into the design of OEM equipment where the control system needs to be compact yet easily upgradable.

Important Precautions

To ensure the safety of the system and the longevity of the hardware, the following precautions should be followed:

• Correct Power Supply Placement: Always install the Power Supply module in the leftmost slot designated for it. Placing it in a standard I/O slot can cause serious damage to the base unit bus.

• Slot Protection: Use blank cover modules for any empty slots on the base unit. This prevents dust, metal shavings, or accidental contact from damaging the exposed bus connectors.

• Extension Cable Limits: When using extension bases, never exceed the maximum total length of extension cables specified for your PLC series to avoid communication timing errors.

• Secure Fastening: Ensure that every module is firmly clicked into place and that the module fixing screws are tightened. Loose modules can cause intermittent "Unit Verify Error" alarms.

• Grounding Requirements: The base unit must be properly grounded via the ground terminal on the Power Supply module or the base itself to ensure that the internal noise filters function correctly.

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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