Description
Serving as a highly integrated hub for compact machine automation, the Mitsubishi Electric FX3GE-24MT/ES is a main unit controller within the MELSEC FX3GE Series. This unit combines the processing capability of the FX3G architecture with embedded Ethernet and analog processing functions in a single, space-saving footprint. It features 14 digital inputs and 10 transistor (sink) outputs alongside built-in analog current/voltage interfaces, eliminating the need for separate expansion adapters for standard networking and analog control tasks.
Key Features
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Integrated Networking: Embedded RJ45 Ethernet port supporting MC Protocol and CC-Link IE Field Network Basic.
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Built-In Analog I/O: Includes 2 channels of analog input and 1 channel of analog output (selectable 0-10V DC or 4-20mA).
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High-Speed Processing: Program execution speeds of 0.21 microseconds per basic instruction.
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Flexible Expansion: Dual bus architecture allows connection of FX3 series expansion boards and special function blocks.
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Dual-Polarity Inputs: Digital inputs configurable for either sink or source wiring layouts.
Applications
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Packaging Machinery: Precise timing and synchronization via high-speed counter inputs.
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Pumping & Water Treatment: Integrated analog channels manage level, flow, and pressure transmitters directly.
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Distributed Control Stations: Built-in Ethernet makes this unit an ideal node for distributed factory-floor networks.
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Material Handling: Local conveyor and sorting control integrated with main system SCADA architectures.
Technical Specifications
| Parameter |
Specification Value |
| Manufacturer |
Mitsubishi Electric |
| Model Reference |
FX3GE-24MT/ES |
| Control Series |
MELSEC FX3GE |
| Supply Voltage |
100 to 240 V AC (+10% / -15%), 50/60 Hz |
| Power Consumption |
32 W |
| Integrated Digital Inputs |
14 points (24 V DC, Sink/Source, 7 mA) |
| Integrated Digital Outputs |
10 points (Transistor, Sink) |
| Output Capacity |
0.5 A per point, 0.8 A per common (Y0-Y3), 1.6 A per common (Y4-Y11) |
| Integrated Analog Inputs |
2 channels (0 to 10 V DC / 4 to 20 mA), 12-bit resolution |
| Integrated Analog Output |
1 channel (0 to 10 V DC / 4 to 20 mA), 12-bit resolution |
| Communication Ports |
1x RJ45 (Ethernet), 1x Mini-USB, 1x RS-422 |
| Operating Temperature |
0 to 55 degC (ambient storage: -25 to 75 degC) |
| Net Weight |
0.6 kg |
| Shipping Weight (Calculated) |
2.0 kg |
| Physical Dimensions |
130 mm (W) x 90 mm (H) x 86 mm (D) |
Connections and Interfaces
| Terminal Code |
Functional Assignment |
| L / N |
100-240 V AC Power Input Lines |
| S/S |
Digital Input Common Terminal (Sink or Source reference) |
| X000 to X015 |
24 V DC Digital Inputs (X000-X007 support high-speed counters up to 60 kHz) |
| COM1 to COM3 |
Common Terminals for Transistor Outputs |
| Y000 to Y011 |
Transistor Outputs (Y000-Y002 support high-speed pulse trains up to 100 kHz) |
| V1+, V2+, I1+, I2+, COM |
Analog Inputs (Voltage/Current selectable) & Common Analog ground |
| V3+, I3+ |
Analog Output Terminals (Voltage/Current selectable) |
Empirical Engineering Insights
Alternative Models & Compatibility
When migration from standard FX3G series processors is required, the FX3GE-24MT/ES is a direct upgrade path. It offers identical terminal footprint dimensions for the core I/O while adding the native Ethernet capability without using expansion slot resources. Note that programming configurations require GX Works2 version 1.090U or later to natively access the integrated Ethernet parameters and built-in analog settings.
Application Pitfalls & Engineering Notes
Because this model utilizes transistor (sink) outputs, inductive loads such as DC solenoid valves or relays must be protected with external flyback diodes wired in parallel with the load. Exceeding the total common-terminal current limit (1.6 A for Y4-Y11) will trigger thermal breakdown of the internal output transistors, which are not user-serviceable.
Commissioning & Wiring Tips
To ensure stable analog measurement, prevent route mixing of the analog signal wires with the AC power supply lines or high-voltage lines. Always use twisted-shielded cables for the 2-channel analog inputs and 1-channel output, grounding the shield at a single point near the PLC chassis ground terminal.
Installation Guidelines
CRITICAL WARNING:
Ensure all primary and auxiliary power supplies are completely de-energized before mounting, wiring, or removing terminal blocks. Failure to isolate the power source can result in electrical shock, CPU memory corruption, or permanent damage to the semiconductor junctions of the transistor outputs.
1
Mount the controller onto a standard 35 mm DIN rail (DIN46277). Secure using the integrated DIN rail mounting hooks on the rear. Ensure vertical orientation inside an IP20 or higher enclosure.
2
Connect the main 100-240 V AC power lines to the L and N terminal screws. Ensure a dedicated Class D ground wire (100 ohms or less resistance) is linked directly to the functional ground terminal.
3
Wire the discrete inputs using the S/S terminal to determine Sink or Source mode. Use 24V DC wet contacts for input signals, routing inputs through a separate conduit from high-voltage motor feeds.
4
Configure the IP address parameters via GX Works2 prior to connecting to the production switch, verifying the network subnet masks match your regional field architecture.