Product Overview
When you need a compact yet powerful PLC for small to medium automation tasks, the Mitsubishi FX3G-40MT/ES-A Main Unit delivers reliable performance. This unit from the MELSEC-F SERIES integrates 24 digital inputs and 16 transistor outputs in a single terminal block connection form, simplifying wiring and reducing panel space. With a 100-240V AC power supply and 37W power consumption, it fits standard industrial environments.
Technical Specifications Breakdown
The FX3G-40MT/ES-A offers 24 input points (24V DC, sink/source) and 16 output points (transistor, sink). Total I/O points reach 40, expandable locally to 128 and with remote I/O to 256. Program memory is 32K steps stored in EEPROM, ensuring non-volatile retention. Cycle times are 210 ns for LD and 500 ns for MOV instructions, providing fast logic execution. The unit includes USB and RS-422 ports for programming and communication. Ambient temperature range is 0°C to 55°C, with IP10 protection. Dimensions are 130 mm wide, 90 mm high, and 86 mm deep, weighing 0.7 kg.
Industry Applications
This main unit suits applications like packaging machines, conveyor control, and simple process automation. The 24 DC inputs handle sensors and switches, while the 16 transistor outputs drive actuators directly. For cost-conscious buyers, the FX3G-40MT/ES-A offers a balanced mix of I/O count and processing speed without overpaying for unused features.
Installation & Setup Guidance
Mount the unit on a DIN rail or panel using the provided slots. Connect the AC power supply (100-240V) to the designated terminals. Wire DC inputs as sink or source according to your sensor configuration. Transistor outputs require an external DC power supply for the load side. Use the USB port for quick programming via GX Works2 or GX Developer. Ensure ambient temperature stays between 0°C and 55°C and avoid dust accumulation to maintain IP10 rating.
Maintenance & Reliability
Regularly inspect terminal connections for tightness and check for ambient temperature extremes. The EEPROM program memory requires no battery backup, but a buffer battery is optional for real-time clock retention. Clean the enclosure with a dry cloth; avoid solvents. Following these steps extends service life and reduces unplanned downtime, maximizing return on investment.
Compatibility & Integration
The FX3G-40MT/ES-A integrates with Mitsubishi MELSEC-F series expansion modules for additional I/O. It communicates via USB and RS-422, allowing connection to HMIs, drives, and SCADA systems. For remote I/O expansion, up to 256 total points are supported. Verify compatibility with your existing network infrastructure before ordering.
Selection Guide & Purchasing Advice
Before purchasing, confirm your I/O count requirements: this unit provides 24 inputs and 16 outputs. If you need more, consider expansion modules. The transistor output type is suitable for high-speed switching but requires an external load power supply. SpareTechPLC stocks this model and can advise on availability and lifecycle status. Contact us for current stock and replacement options if needed.
Frequently Asked Questions
Q1: Can the FX3G-40MT/ES-A be used with 24V DC sensors?
Yes, the inputs accept 24V DC in sink or source configuration, compatible with most industrial sensors.
Q2: What programming software is required?
Use Mitsubishi GX Works2 or GX Developer via the built-in USB port.
Q3: Is the program memory battery-backed?
No, the program memory is EEPROM, so it retains data without a battery. An optional buffer battery supports the real-time clock.
Q4: How many expansion modules can I add?
You can expand locally to 128 I/O points and up to 256 total with remote I/O.
Q5: What is the maximum ambient temperature for operation?
The unit operates from 0°C to 55°C ambient temperature.
