Product Introduction
When your control system requires reliable sequencing and logic handling in a compact footprint, the Mitsubishi FX3G-24MR/ES delivers. This base unit from the MELSEC-F SERIES integrates 14 digital inputs at DC 24V and 10 relay outputs, all powered by a universal AC 100-240 V supply. It handles demanding applications with 32K steps of program memory stored in durable EEPROM, ensuring your logic remains intact even during power loss.
Technical Specifications Breakdown
Power and Processing
- Power Supply: AC 100-240 V, 50/60 Hz (current type AC). Power consumption is 32 W.
- Program Memory: 32K steps stored in EEPROM for non-volatile retention.
- Cycle Times: 210 ns for the LD instruction and 500 ns for the MOV instruction, enabling fast logic execution.
I/O and Expansion
- Integrated Digital Inputs: 14 points, DC 24V.
- Integrated Digital Outputs: 10 relay outputs, suitable for switching AC/DC loads.
- Local I/O Points: 128 maximum; with remote expansion, up to 256 points.
- Expandable: Yes, allowing system growth as needs evolve.
Communication and Environment
- Built-in Ports: 1 USB and 1 RS-422 for programming and connectivity.
- Ambient Temperature: 0 °C to 55 °C operating range.
- Protection Class: IP10.
- Buffer Battery: Optional, for retaining certain data during power-off.
Industry Applications
Packaging Machinery
In high-speed packaging lines, the FX3G-24MR/ES controls conveyor sequencing, product counting, and actuator timing. Its 14 inputs handle sensor feedback, while the 10 relay outputs drive contactors and solenoid valves. The 210 ns LD cycle time ensures precise timing for repetitive operations.
Material Handling Systems
For small conveyor networks or sorting stations, this PLC manages start/stop logic, emergency stops, and diverter gates. The expandable I/O (up to 256 points) allows adding remote I/O modules for larger layouts without replacing the base unit.
Installation & Setup Guidance
Mount the FX3G-24MR/ES on a DIN rail inside an enclosure rated for IP10 or higher. Connect the AC power supply (100-240 V) to the designated terminals, ensuring proper fusing per local codes. Wire DC 24V sensors to the input terminals and relay loads to the output terminals, observing current ratings. Use the USB port for initial programming via GX Works2 or GX Developer. Verify all wiring before applying power.
Maintenance & Reliability
The EEPROM program memory eliminates battery dependency for program retention, reducing maintenance intervals. Periodically inspect the unit for dust accumulation, especially in environments with particulate matter. Keep ambient temperature within 0 °C to 55 °C to ensure reliable operation. The optional buffer battery can be installed if data retention during extended power outages is required. Regular visual checks of relay output contacts for wear are recommended.
Compatibility & Integration
This FX3G base unit integrates seamlessly with Mitsubishi MELSEC-F series expansion modules, including analog I/O, temperature control, and communication adapters. The built-in RS-422 port supports networking with Mitsubishi HMI panels and other FX series PLCs. Use the USB port for direct PC connection. The 256 total I/O capacity (local + remote) allows integration into distributed control architectures.
Selection Guide & Purchasing Advice
Before ordering, confirm your system requires 14 DC inputs and 10 relay outputs. Verify the power supply matches your facility voltage (AC 100-240 V). If you need additional I/O points, plan for expansion modules. The FX3G-24MR/ES is a current model; please verify lifecycle status and availability with SpareTechPLC before ordering. SpareTechPLC stocks genuine Mitsubishi parts and can advise on compatible accessories.
Frequently Asked Questions
Q1: What is the program memory size of the FX3G-24MR/ES?
A1: It has 32K steps of program memory stored in EEPROM.
Q2: Can I expand the I/O beyond the built-in 14 inputs and 10 outputs?
A2: Yes, the unit is expandable. Local I/O can reach 128 points, and with remote expansion, up to 256 points total.
Q3: What communication ports are included?
A3: It includes one USB port and one RS-422 port.
Q4: What is the operating temperature range?
A4: The ambient temperature range is 0 °C to 55 °C.
Q5: Does the FX3G-24MR/ES require a battery for program retention?
A5: No, the program is stored in EEPROM and does not require a battery. An optional buffer battery is available for other data retention needs.
