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RJ45 jack and cat 5 cable

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    RJ45 jack and cat 5 cable

    Ok, I just purchased two TR-40 thermostats for upstairs and downstairs, a two port RS485 card for the HS pc. I have a few questions.

    Can I use Cat 5 cable to connect to the RJ45 jack in the TR-40 control unit to the RS485 card in the HS pc?

    What else do I need to install other than the HS plugin?

    The serial thing is new to me. In the past I have only used X-10.

    Thanks in advance
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