Product Overview
When expanding production lines demands both higher I/O counts and reliable control, the Mitsubishi FX3U-80MT-ES-A delivers a robust solution. This FX3U base unit integrates 40 DC 24 V inputs and 40 transistor outputs in a single compact chassis, powered by a universal AC 100-240 V supply. Part of the MELSEC-F SERIES, it offers 64K STEPS of program memory stored in RAM, ensuring fast execution for complex sequences.
Technical Specifications Breakdown
Power Supply and Input/Output
- Power Supply (V): 100-240 V AC — wide input range simplifies global installation.
- Integrated Digital Inputs: 40 points at DC 24 V, suitable for sensors and switches.
- Integrated Digital Outputs: 40 transistor outputs with SOURCE logic, driving loads directly without external relays.
Performance and Memory
- Program Memory: 64K STEPS (RAM) provides ample space for large logic programs.
- Local I/O Points: 256 points, expandable to 384 with remote I/O.
- Cycle Time LD (ns): 65 ns — extremely fast ladder logic execution.
- Cycle Time MOV (ns): 642 ns for move instructions, ensuring responsive control.
Environmental and Physical
- Protection Class: IP10 — suitable for clean indoor environments.
- Ambient Temperature Range: 0 °C to 55 °C, reliable in typical industrial conditions.
- Dimensions (WxHxD): 285 x 90 x 86 mm; weight 1.2 kg.
Industry Applications
Packaging Machinery
In high-speed packaging lines, the FX3U-80MT-ES-A handles dozens of proximity sensors and actuators. The 40 transistor outputs switch solenoids and motors rapidly, while the 65 ns cycle time keeps throughput high.
Material Handling Systems
For conveyor sorting stations, the 40 DC 24 V inputs read photo-eyes and limit switches. The expandable architecture (up to 384 I/O points) allows future addition of remote I/O modules without replacing the base unit.
Installation & Setup Guidance
Mount the FX3U-80MT-ES-A on a DIN rail or panel using the integral slots. Ensure the ambient temperature stays between 0 °C and 55 °C and that airflow around the unit is unobstructed. Connect the AC power supply (100-240 V) to the designated terminals, then wire DC 24 V sensors to the input terminals. For transistor outputs, verify the load current does not exceed the rated value per point. Use the RS-422 port for programming or HMI communication; USB is available as an option.
Maintenance & Reliability
Regularly inspect the unit for dust accumulation, especially around ventilation openings. The buffer battery preserves program memory during power loss — check its status annually and replace if needed. Given the IP10 rating, avoid exposure to moisture or conductive debris. Following these steps extends service life and prevents unexpected downtime.
Compatibility & Integration
The FX3U-80MT-ES-A integrates seamlessly with other MELSEC-F SERIES modules. Use the RS-422 port for connection to Mitsubishi HMIs or programming tools. The unit supports local expansion units and remote I/O stations, enabling system scalability. No special communication protocols are required for basic operation, making it straightforward to retrofit into existing control panels.
Selection Guide & Purchasing Advice
Before ordering, confirm your system voltage matches the AC 100-240 V supply requirement. Verify that 40 DC 24 V inputs and 40 transistor source outputs meet your I/O count. If you need more points, remember the FX3U-80MT-ES-A supports expansion up to 384 local + remote I/O. SpareTechPLC stocks this model and can advise on compatible expansion modules and accessories. Contact us to verify current lifecycle status and availability before ordering.
Troubleshooting & Common Issues
Problem: PLC does not power on.
Check: Ensure the AC supply is within 100-240 V and the power terminals are correctly wired. Verify the power consumption of 45 W is not exceeded by connected loads.
Problem: Outputs do not energize.
Check: Confirm the transistor outputs are configured as SOURCE logic in the program. Inspect the load wiring and verify the output point is not shorted.
Problem: Program fails to run.
Check: Ensure the buffer battery is installed and functional. If the battery is depleted, the RAM program may be lost — reload the program via RS-422 or USB.
Frequently Asked Questions
Q: Can the FX3U-80MT-ES-A be used with 24 V DC sensors?
A: Yes, the 40 integrated digital inputs are designed for DC 24 V signals, compatible with most industrial sensors.
Q: What is the maximum number of I/O points I can achieve with this unit?
A: The base unit provides 40 inputs and 40 outputs. With expansion, you can reach up to 256 local I/O points and 384 total local + remote I/O points.
Q: Does the FX3U-80MT-ES-A include a USB port?
A: USB is available as an option; the standard unit includes one RS-422 port for programming and communication.
Q: What is the typical cycle time for a ladder logic instruction?
A: The LD instruction executes in 65 ns, and the MOV instruction in 642 ns, ensuring fast program execution.
Q: Is the FX3U-80MT-ES-A suitable for high-temperature environments?
A: The unit operates reliably between 0 °C and 55 °C, making it suitable for most industrial settings.
