HomePLC Programing Cable Mitsubishi PLC Programming Cable SC-09 for FX-Series

[DIY-Cable] Mitsubishi PLC Programming Cable SC-09 for FX-Series

DIY Cable for Older Mitsubishi PLC Series: A Lifesaver When USB Isn’t an Option

In the realm of industrial automation, Mitsubishi’s Programmable Logic Controllers (PLCs) are renowned for their reliability and performance. However, as technology evolves, so does the connectivity required to interface with these PLCs. While newer Mitsubishi PLCs offer USB communication for ease and speed, there are instances when older models, such as the FX0N, FX1S, or FX1N, are still in operation. Moreover, even with newer models, you might find yourself in a pinch without a USB cable. In such cases, a DIY cable solution can be a lifesaver.

The Necessity for DIY Cables

Modern industrial environments often rely on USB communication for PLC programming and monitoring. It’s convenient, fast, and readily available. However, older Mitsubishi PLC series lack native USB ports, making it challenging to interface with them using conventional methods. Additionally, in situations where a USB cable is unexpectedly unavailable, you need a reliable alternative.

[DIY-Cable] Mitsubishi PLC Programming Cable SC-09 for FX-Series

Crafting Your DIY Cable

To connect to older Mitsubishi PLC series, you’ll need a few essential components and the know-how to assemble them. Here’s a list of items required:

  1. COM DB9-Female Connector: This connector is essential for connecting to the PC’s serial port.
  2. Mini DIN 8-Pin Connector: The Mini DIN connector is the link between the cable and the PLC.
  3. Resistor (500Ω to 1kΩ): The resistor acts as a crucial component to ensure the correct voltage levels for communication.

Building Your DIY Cable

Creating your own cable might seem daunting, but with a clear diagram and the right components, it’s a straightforward process. Follow these steps to construct your cable:

Step 1: Gather the Components

Collect the COM DB9-Female connector, Mini DIN 8-Pin connector, and the resistor with a resistance value between 500Ω and 1kΩ.

Step 2: Wiring the Cable

Using the diagram provided by Mitsubishi or a reliable source, carefully wire the components as instructed. Pay close attention to the pinout details, ensuring that each connection is accurate.

Step 3: Soldering (If Necessary)

Depending on your connectors, you might need to solder the connections for added stability and durability. Be sure to follow proper soldering techniques to create secure and reliable connections.

Step 4: Insulation

Once the connections are in place and secure, insulate them properly to prevent short circuits or any unintended contact between wires.

Step 5: Test the Cable

Prior to employing your DIY cable, it is essential to conduct a thorough assessment for continuity and accuracy. You can use a multimeter to check the connections and ensure there are no loose wires or solder joints.

Benefits of DIY Cables

Creating your own cable for Mitsubishi PLCs, especially the older series, offers several advantages:

  1. Cost-Efficiency: DIY cables are often more affordable than purchasing specialized cables, making them a budget-friendly solution.
  2. Flexibility: You have control over the cable’s length, ensuring it suits your specific needs.
  3. Quick Resolution: In emergencies or situations where USB cables are unavailable, a DIY cable can save the day.
  4. Learning Experience: Building your cable can be an educational experience, enhancing your understanding of PLC communication.


While USB communication has revolutionized the way we interact with modern Mitsubishi PLCs, older models and unexpected USB cable shortages can pose challenges. Crafting your DIY cable, with the right components and careful attention to detail, provides a cost-effective, flexible, and reliable solution for interfacing with older PLCs or handling unforeseen circumstances.

This DIY approach ensures you’re always prepared to connect, program, and monitor your Mitsubishi PLCs, regardless of the situation. So, don’t let outdated technology or missing cables stand in your way – build your DIY cable and keep your automation processes running smoothly.

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