Mitsubishi FX3G-40MTESS

Mitsubishi FX3G-40MTESS

Product Introduction FX3G-40MTESS is transistor output type main CPU unit of Mitsubishi MELSEC-F FX3G series PLC. It integrates built-in I/O points, high speed counter, simple positioning function and serial communication port. This compact controller executes logic control, timing, counting and motion positioning tasks for small and medium automation machines. It supports extension modules for analog and additional discrete I/O to expand control capacity.

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Description

Mitsubishi FX3G-40MTESS

Technical Specifications

  • Product Type: PLC main processing unit
  • Total Built-in I/O Points: 40 points
  • Digital Input: 24 points, 24 V DC sink input
  • Digital Output: 16 points, transistor sink output
  • Power Supply: 100-240 V AC, 50 / 60 Hz
  • Program Memory: 6400 steps built-in flash memory
  • High Speed Counter: 6 channels 100kHz single phase, 2 channels 50kHz two phase
  • Positioning Function: 3 axes simple pulse positioning
  • Communication Interfaces: RS422 programming port, USB port
  • Protection Rating: IP20
  • Operating Temperature: 0 °C to +55 °C
  • Storage Temperature: -20 °C to +75 °C
  • Mounting Method: DIN rail mounting
  • Net Weight: 0.7 kg

Functional Features

  1. 40 built-in I/O points for direct connection of sensors, switches and actuators.
  2. High speed counter function captures pulse signals from encoders and flow meters.
  3. 3-axis simple positioning outputs pulse signals to drive servo and stepping motor drives.
  4. Flash program memory retains user program without backup battery.
  5. Built-in real time clock supports time sequence control and timestamp logging.
  6. RS422 and USB ports support programming and HMI communication connection.
  7. Expandable architecture allows adding analog, temperature and extra I/O modules.
  8. Rich instruction set supports logic, arithmetic, data comparison and register operation.
  9. Built-in self-diagnostic function detects power fault, program error and hardware abnormality.
  10. Password protection prevents unauthorized reading and modification of user control program.

Application Scenarios

  • Packaging machine and conveyor automation control
  • Plastic injection molding auxiliary machine control
  • Small water treatment automatic control system
  • Material handling and sorting machine logic control
  • Small HVAC and boiler auxiliary equipment control

Material Composition

  • Housing: Flame-retardant ABS plastic enclosure
  • Main PCB: FR4 printed circuit board
  • Main processor: Mitsubishi industrial microcontroller chip
  • Memory chip: Flash memory IC
  • Terminal block: Tin-plated copper alloy screw terminals
  • Communication connectors: Plastic housing with gold plated contact pins

Structural Characteristics

  • Slim rectangular DIN rail plastic enclosure.
  • Front panel with LED status indicators for power, run, error and each I/O channel.
  • Front terminal blocks for sensor, actuator and AC power wiring.
  • Programming port located on front panel for direct connection to programming cable.
  • Internal circuit layout separates power supply circuit, logic circuit and I/O drive circuit.
  • Integrated power supply inside main unit without separate power module.

Working Principle After power-on, PLC executes self-diagnostic routine then runs user program cyclically. In scan cycle, FX3G-40MTESS reads status of input terminals, executes ladder logic program, then writes calculated result to output terminals. High speed counter hardware captures pulse signal independent of program scan cycle. Positioning hardware generates pulse sequence to control motor movement. Communication port exchanges data with HMI or programming computer. All I/O status and register data update in each scan cycle.

Installation Requirements

  • Mount unit on standard 35mm DIN rail inside control cabinet.
  • Use shielded twisted pair cable for high speed pulse and communication wiring.
  • Separate PLC signal cables from high power motor cables.
  • Complete protective earth connection for PLC housing.
  • Keep ambient temperature within rated operating range.
  • Download user program and verify I/O mapping before commissioning.
  • Perform I/O forced test to check input and output channel function.

Usage Notes

  • Do not connect AC power to input signal terminals.
  • Load current of transistor output must stay within rated limit.
  • Keep cabinet dry and free of conductive dust and corrosive gas.
  • Backup user program before firmware update or program modification.
  • Disconnect power before wiring modification.
  • Use anti-static protection when handling unit.
  • Replace unit immediately when permanent hardware fault occurs.