RJ45 to 9-pin Serial pinouts

Discussion in 'C-Bus Wired Hardware' started by Tension, Nov 9, 2025.

  1. Tension

    Tension

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    Hi all.

    I'm planning on installing some structured cabling from my C-Bus cabinet to my comms cabinet.

    I want to terminate using an RJ45 connector to plug into on the 5500PC and run that to a 9-pin Sub-D faceplate. I'll then use a standard serial cable to connect my server to the faceplate.

    Which pins on the RJ45 go to which pins on the Sub-D?

    I believe it's just a 3 wire serial link, no hardware handshaking.

    Thanks very much guys.
     
    Tension, Nov 9, 2025
    #1
  2. Tension

    KCW

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    Here you are.
    upload_2025-11-10_11-24-23.png
     
    KCW, Nov 10, 2025
    #2
    Tension likes this.
  3. Tension

    Tension

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    Perfect, thanks! So unless I'm missing something:

    RJ45 pin 4 - pin 5 SubD
    RJ45 pin 5 - pin 2 SubD
    RJ45 pin 6 - pin 3 SubD
     
    Tension, Nov 10, 2025
    #3
  4. Tension

    Tension

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    Well I ****ed that up :'(
     
    Tension, Nov 19, 2025
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