Product Overview
When industrial control systems require a reliable and cost-effective programmable logic controller, the Mitsubishi FX3G-40MR/ES delivers a balanced solution. This base unit from the MELSEC-F SERIES integrates 24 digital inputs and 16 relay outputs, powered by a universal AC 100-240 V supply. Designed for small to medium automation tasks, it offers a low total cost of ownership through energy-efficient operation and long service life.
Technical Specifications Breakdown
Power Supply and Consumption
The FX3G-40MR/ES operates on AC 100-240 V, making it suitable for global installations without additional transformers. Its power consumption is 37 W, which translates to lower electricity bills over years of continuous use. This efficiency directly reduces operational costs in 24/7 production environments.
Memory and Processing Speed
With 32K STEPS of program memory stored in EEPROM, the controller retains logic without battery backup. The cycle time for basic instructions is 210 ns (LD) and 500 ns (MOV), enabling fast response to sensor inputs. Faster processing reduces machine cycle times, increasing throughput and profitability.
I/O Configuration and Expansion
The unit features 24 integrated digital inputs (DC 24V) and 16 relay outputs. Local I/O points total 128, expandable to 256 with remote I/O. Relay outputs handle higher currents than transistor types, reducing the need for external contactors in many applications. Expansion capability allows scaling up without replacing the base unit, protecting your initial investment.
Environmental Durability
Rated IP10, the enclosure protects against solid objects larger than 50 mm. The ambient temperature range of 0 °C to 55 °C ensures reliable operation in typical factory conditions. No special cooling is required, saving on installation and maintenance costs.
Industry Applications
Packaging Machinery
In packaging lines, the FX3G-40MR/ES controls conveyor belts, fillers, and sealers. Its 16 relay outputs directly drive solenoid valves and small motors, while 24 inputs monitor photo-eyes and limit switches. The fast cycle time keeps packaging speeds high, reducing per-unit cost.
Material Handling Systems
For sorting and transfer stations, the PLC manages multiple sensors and actuators. The expandable I/O (up to 256 points) accommodates future line extensions without a new controller. This modularity lowers long-term capital expenditure.
Installation and Setup Guidance
Mount the FX3G-40MR/ES on a DIN rail or panel using the integrated slots. Connect AC power to the L and N terminals, ensuring the supply voltage matches 100-240 V. Wire DC 24V inputs to the input commons, and relay outputs to load circuits. Use the built-in USB port for programming via GX Works2 or GX Developer. The RS-422 port enables connection to HMIs or remote I/O. Always follow local electrical codes to ensure safe and reliable operation.
Maintenance and Reliability
Regular inspection of terminal connections and environmental conditions extends the PLC's life. The EEPROM memory eliminates battery replacement costs, and the relay outputs provide a proven, rugged switching mechanism. With no battery to change, maintenance intervals are longer, reducing labor costs. Keep the ambient temperature within 0 °C to 55 °C to prevent overheating. The IP10 rating means the unit should be installed in a clean, dry cabinet.
Compatibility and Integration
The FX3G-40MR/ES integrates seamlessly with Mitsubishi FX3G expansion modules, HMIs, and drives via the MELSEC-F SERIES architecture. The RS-422 port supports communication with remote I/O or operator interfaces. USB connectivity simplifies programming and diagnostics. For larger systems, multiple FX3G units can be networked. This compatibility reduces integration time and engineering costs.
Selection Guide and Purchasing Advice
Before ordering, verify that your application requires 24 DC inputs and 16 relay outputs. If more I/O is needed, confirm expansion module availability. The FX3G-40MR/ES is a cost-effective choice for standalone or distributed control. SpareTechPLC stocks this model and can advise on compatible accessories. Contact our team to confirm current lifecycle status and availability before purchasing.
Frequently Asked Questions
What is the power supply requirement for the FX3G-40MR/ES?
The unit requires AC 100-240 V, 50/60 Hz. It consumes 37 W.
How many inputs and outputs does this PLC have?
It has 24 digital inputs (DC 24V) and 16 relay outputs.
Can I expand the I/O points later?
Yes, the FX3G-40MR/ES supports expansion up to 128 local I/O points and 256 total with remote I/O.
What programming software is compatible?
Use Mitsubishi GX Works2 or GX Developer via the built-in USB port.
Does the PLC require a battery for memory backup?
No, the program memory is EEPROM, so it retains data without a battery. A buffer battery is optional for real-time clock retention.
