Mitsubishi FX2N-128MR-ES UL PLC Main Unit Controller

Mitsubishi FX2N-128MR-ES/UL PLC Main Unit Controller

 

The Mitsubishi FX2N-128MR-ES/UL is a main PLC (CPU base unit) in the MELSEC FX2N series, designed for medium-scale industrial automation control. It integrates CPU + 64 digital inputs + 64 relay outputs in one compact controller.

Basic Information

• Part Number: FX2N-128MR-ES/UL
• Brand: Mitsubishi Electric
• Series: MELSEC FX2N (FX family)
• Type: PLC Main Unit (CPU + I/O integrated)
• Output Type: Relay output
• Certification: UL / CE version

System Configuration

• Total I/O Points: 128 points
  • Inputs: 64 × 24V DC digital inputs
  • Outputs: 64 × relay outputs
• Power Supply: AC 100–240V
• Control Method: Stored program cyclic scan (PLC CPU control)
• Programming: Ladder logic (GX Developer / GX Works2)

Key Technical Features

• High-speed processing for industrial automation tasks
• Built-in 64 DI + 64 DO (no need separate base rack)
• Relay output supports AC/DC load switching
• Expandable up to approx. 256 I/O via extension modules
• Supports FX2N expansion modules and special function modules
• Built-in real-time clock (RTC)
• High-speed counter and pulse output functions
• DIN rail or panel mounting

Electrical Characteristics

• Input Voltage: 24V DC (sink/source compatible)
• Output Type: Relay (isolated contact output)
• Output Load: typically up to 2A per point (resistive load)
• Internal Power Supply: 5V DC logic system
• Isolation: Photocoupler + relay isolation

Key Features

• Compact “all-in-one” PLC controller
• Easy wiring with terminal block design
• Suitable for both small and medium automation systems
• Stable relay output for industrial loads
• Flexible expansion with FX2N modules
• Strong compatibility with Mitsubishi FX ecosystem

Application Areas

• Packaging machines
• Conveyor systems
• Industrial production lines
• HVAC systems
• Pump control systems
• Machine automation equipment
• Light industrial control systems

Advantages

• Integrated 128 I/O reduces system cost
• Simple installation and commissioning
• Reliable relay output switching
• Expandable FX2N architecture
• Stable long-term industrial operation
• Widely used and easy to maintain

Precautions

• Relay outputs have limited mechanical life (switching cycles)
• Do not exceed rated load per output channel
• Ensure proper grounding for noise protection
• Must match FX2N compatible expansion modules
• Battery required for program retention (if applicable configuration)