Introduction: Solving Space and Speed Constraints in Machine Control
When a packaging line upgrade demanded faster cycle times and tighter integration within a limited panel footprint, the Mitsubishi FX3G-14MR/ES delivered a compact yet powerful solution. This FX3G base unit from the MELSEC-F SERIES combines 8 integrated digital inputs and 6 relay outputs in a space-saving 90 mm wide enclosure. Its 210 ns cycle time for LD instructions and 500 ns for MOV instructions ensures responsive control for high-speed sorting and indexing applications. With program memory of 32K steps stored in EEPROM, the FX3G-14MR/ES retains logic without battery backup, reducing maintenance overhead.
Technical Specifications Breakdown
The FX3G-14MR/ES operates on AC 100-240 V power supply, drawing 31 W maximum. It integrates 8 digital inputs at DC 24V and 6 relay outputs, providing direct interface with sensors and actuators. The unit supports up to 128 local I/O points and 256 total I/O points when combined with remote modules, and expansion is possible for growing system needs. Cycle time performance of 210 ns for LD and 500 ns for MOV instructions enables precise timing in discrete control tasks. Built-in USB and RS-422 ports simplify programming and communication with HMIs or supervisory systems. The ambient temperature range from 0 °C to 55 °C suits typical industrial environments, and the IP10 protection class guards against solid objects larger than 50 mm. Dimensions of 90 mm width, 90 mm height, and 86 mm depth, with a weight of 0.5 kg, allow easy DIN-rail mounting in crowded cabinets. A buffer battery is available as an option for real-time clock retention.
Industry Applications
In a conveyor sorting system for a distribution center, the FX3G-14MR/ES manages 8 proximity sensors and 6 relay-driven diverters. The fast cycle time ensures accurate product routing at line speeds exceeding 60 items per minute. The relay outputs handle inductive loads from solenoid valves without external interposing relays, simplifying wiring. For a small packaging machine, the unit controls a pick-and-place sequence using 6 relay outputs for pneumatic actuators. The 32K step memory accommodates complex pick sequences, while the USB port enables quick program changes during setup. The expandability allows future addition of analog modules for temperature monitoring.
Installation & Setup Guidance
Mount the FX3G-14MR/ES on a DIN rail within a panel that maintains ambient temperature between 0 °C and 55 °C. Connect AC power (100-240 V) to the designated terminals, ensuring proper fusing per local codes. Wire DC 24V sensors to the 8 input terminals, observing polarity. The 6 relay outputs are form-A contacts rated for resistive loads; use external suppression diodes for inductive loads. Connect the USB cable to a PC for programming with GX Works2 or GX Developer. The RS-422 port supports connection to Mitsubishi HMI or SCADA systems. Verify that the total I/O count does not exceed 128 local points before adding expansion modules.
Maintenance & Reliability
Regularly inspect the FX3G-14MR/ES for dust accumulation on the IP10-rated enclosure. Clean with a dry cloth; do not use solvents. Check relay output contacts periodically for wear, especially in high-cycle applications. The EEPROM program memory requires no battery for retention, but if the optional buffer battery is installed, replace it every 5 years. Monitor ambient temperature to stay within 0 °C to 55 °C to prevent overheating. Verify power supply voltage remains within AC 100-240 V to avoid damage. These steps extend service life and reduce unplanned downtime.
Compatibility & Integration
The FX3G-14MR/ES integrates with the MELSEC-F SERIES expansion modules for analog I/O, temperature control, and communication. The built-in RS-422 port enables connection to Mitsubishi HMI models (e.g., GOT series) or third-party SCADA via protocol converters. The USB port allows direct programming and monitoring from a PC. For remote I/O expansion, up to 256 total I/O points are supported. The unit communicates with Mitsubishi inverter drives via RS-422 for coordinated motion control. No additional communication protocols are specified in the data; verify compatibility with your existing network architecture.
Selection Guide & Purchasing Advice
Before ordering the FX3G-14MR/ES, confirm that your application requires 8 DC 24V inputs and 6 relay outputs. If you need more I/O, consider expansion modules from the FX3G series. Verify that the AC power supply matches your facility voltage (100-240 V). The IP10 rating is suitable for clean indoor environments; for dusty or wet areas, install in a sealed enclosure. The 0.5 kg weight and compact dimensions simplify logistics. SpareTechPLC stocks this model and can advise on current lifecycle status and availability. Contact our team to confirm stock and lead times before placing an order.
Frequently Asked Questions
Q1: What is the program memory size of the FX3G-14MR/ES?
A1: The FX3G-14MR/ES has 32K steps of program memory stored in EEPROM, which retains data without a battery.
Q2: Can I expand the I/O count beyond the built-in 8 inputs and 6 outputs?
A2: Yes, the FX3G-14MR/ES supports expansion up to 128 local I/O points and 256 total I/O points with remote modules.
Q3: What communication ports are available on the FX3G-14MR/ES?
A3: The unit includes one USB port and one RS-422 port for programming and HMI/SCADA connection.
Q4: What is the ambient temperature range for operation?
A4: The FX3G-14MR/ES operates from 0 °C to 55 °C ambient temperature.
Q5: Does the FX3G-14MR/ES require a battery to retain the program?
A5: No, the program is stored in EEPROM and does not require a battery. An optional buffer battery is available for real-time clock retention.
