Product Overview
When you need a reliable, compact controller for a small machine or basic automation task, the Mitsubishi FX1S-20MT-001 delivers exactly what you require. This PLC CPU module from the FX1S series is designed for applications where space is limited and cost efficiency matters. With 20 total I/O points, it provides enough control for straightforward processes without overcomplicating your design.
The FX1S-20MT-001 operates on AC220V power and uses transistor outputs, making it suitable for high-speed switching and precise positioning tasks. Its small outline dimension of 757590 mm allows it to fit into tight enclosures, while still offering the core functionality of a full-featured PLC.
Technical Specifications Breakdown
Let's examine the key specifications that define this module's capabilities:
- Total I/O Points: 20 points – This includes 12 input points and 8 output points, giving you a balanced ratio for typical sensor-to-actuator applications.
- Input Points: 12 points – These digital inputs accept signals from pushbuttons, limit switches, proximity sensors, and other discrete devices.
- Output Points: 8 points – The transistor outputs (drain type) can drive solenoids, contactors, indicator lights, and small motors directly.
- Voltage: AC220V – The power supply input accepts standard industrial AC mains voltage, simplifying installation in most facilities.
- Output Type: Transistor – Transistor outputs switch faster than relay outputs and have no mechanical wear, making them ideal for high-cycle applications.
- Outline Dimension: 757590 – This compact footprint allows mounting in small cabinets or directly on machinery.
Industry Applications
The FX1S-20MT-001 excels in small-scale automation where a larger PLC would be overkill. Consider these typical use cases:
Packaging Machines – In a simple labeling or sealing machine, the 12 inputs monitor product presence and position, while the 8 transistor outputs control actuators and motors. The compact size fits inside the machine frame, reducing panel space requirements.
Conveyor Systems – For short conveyor sections with a few sensors and motor starters, this PLC handles start/stop logic, jam detection, and status indication. The transistor outputs provide rapid switching for precise timing.
Small Assembly Stations – When automating a single workbench or test station, the FX1S-20MT-001 manages operator inputs, fixture clamps, and go/no-go indicators. Its low cost makes it practical even for one-off machines.
Installation & Setup Guidance
Mounting the FX1S-20MT-001 is straightforward. Use the built-in DIN rail clip or panel-mount tabs to secure the module inside your enclosure. Ensure adequate ventilation around the unit, as the compact design can trap heat in confined spaces.
Connect the AC220V power supply to the designated terminals, observing proper polarity and using a dedicated circuit breaker for protection. Wire your input devices (sensors, switches) to the input terminals, and your output loads (solenoids, relays, lamps) to the transistor output terminals. Remember that transistor outputs are polarity-sensitive and require a DC load supply.
For programming, use Mitsubishi's GX Works2 software. The FX1S series supports ladder logic, instruction list, and structured text. Download your program via the built-in programming port using a standard USB-SC09 cable.
Maintenance & Reliability
The FX1S-20MT-001 requires minimal maintenance due to its solid-state design. Transistor outputs have no moving parts, eliminating the wear associated with relay contacts. However, you should periodically inspect the unit for dust accumulation, loose wiring, and signs of overheating.
Check the ambient temperature around the PLC; although the unit is rated for industrial environments, excessive heat can reduce component life. Keep the enclosure clean and ensure cooling fans are functional if present. With proper care, this module provides years of trouble-free operation.
Compatibility & Integration
This PLC is part of the Mitsubishi FX1S family, which is designed for standalone use or integration with other FX series modules. You can expand the I/O count by adding FX2N or FX0N series expansion modules, though the FX1S-20MT-001 itself is a self-contained unit.
For communication, the FX1S series supports serial data transmission via its programming port. This allows connection to HMIs, SCADA systems, or other controllers using Mitsubishi's proprietary protocol or Modbus RTU (with appropriate programming). The MT model also includes positioning capabilities, enabling precise control of stepper or servo drives through pulse train outputs.
Selection Guide & Purchasing Advice
Before ordering the FX1S-20MT-001, verify that your application requires exactly 20 I/O points (12 inputs, 8 outputs) and AC220V power. If you need more I/O or different voltage, consider the FX1S-30MT or FX3U series alternatives.
SpareTechPLC stocks genuine Mitsubishi FX1S-20MT-001 modules with full traceability. We recommend purchasing a spare programming cable and a memory cartridge if you plan to store multiple programs. Please verify current lifecycle status and availability with SpareTechPLC before ordering.
For bulk or project-based pricing, contact our sales team. We offer competitive rates for OEMs and system integrators.
