PCI RS232 Interfaces

Discussion in 'C-Bus Serial Protocols' started by Beerygaz, Nov 3, 2012.

  1. Beerygaz

    Beerygaz

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    Not sure if this should be posted here on in the hardware group - but how many serial interfaces are in a PCI? I see there are 2 RJ45 connectors and a DB9 connector, but am I correct in assuming there is only one RS232 interface in the device so it's one external interface per PCI?
     
    Beerygaz, Nov 3, 2012
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  2. Beerygaz

    Roosta

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    You are correct.. Single interface per PCI

    The 2 rj45 connectors are the loop in loop out cbus connectors..

    Db9 connector is the external rs232 interface connection..

    Cheers..
     
    Roosta, Nov 3, 2012
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  3. Beerygaz

    Ashley

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    Actually it's got 4 RJ45 connectors. 2 are C-Bus and 2 are RS232 (as well as the DB9), but all 3 RS232 connectors are wired in parallel as shown in the installation manual so you can only connect to one at a time. Not idea why it would have 2 RJ45 RS232 connectors.
     
    Ashley, Nov 4, 2012
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  4. Beerygaz

    ashleigh Moderator

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    A small number of installations use the RJ-45 serial connections for things like permanent connection to a security alarm system.

    I tend to agree that it is a little odd, and rarely used. Nevertheless, for those who need it, it's there.
     
    ashleigh, Nov 4, 2012
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  5. Beerygaz

    Beerygaz

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    Thanks for the calrification. I do indeed want to permanently connect it to a Paradox alarm panel via the PRT3 module. I figured the DB9 and RS232 were shared, but the second RS232 is what threw me, seems wierd to have 2 of them (unless you figure they just reused existing parts like the bus loop through ports).
     
    Beerygaz, Nov 5, 2012
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  6. Beerygaz

    Roosta

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    Haha corrected i have been.. Thanks Ashley and Ashleigh.. Haha i have neber ever noticed those RJ45 serial connectors on a 5500PC..

    Learn something new everyday!!

    Cheers..
     
    Roosta, Nov 6, 2012
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  7. Beerygaz

    jboer

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    The only problem being that some late nights with little coffee they look awfully like the CBus side... The 232 chip doesn't like 30v very much :p
     
    jboer, Nov 6, 2012
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