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Thread: Help rs485 :)

  1. #21
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    Default Re: Help rs485 :)

    well looked at pricing for parts i can see why no one uses usb sockets instead of Rj45. Rj45 is about 3 times cheaper and a male usb socket is about 2 dollars and i can get 100 modular rj45 male connectors for like 3 bucks...maybe i will change my method lol i will still utilize usb but make like an 4 to 8 port splitter using rj45 jack sockets in the configuration of the cables.
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  2. #22
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    Default Re: Help rs485 :)

    Quote Originally Posted by budude View Post
    No... I think you misunderstood what I said... I said it might be possible to build a controller with a direct USB interface but none of the current designs have yet...

    You must get either an RS-232 or RS-485 interface adaptor - or go DMX (which is RS-485 as well).
    so what your saying is i have to use the serial port on the computer?....i am trying to stay away from that i want to use the USB port i dont care as much whats after that
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  3. #23
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    Default Re: Help rs485 :)

    Refer to post #13..

  4. #24
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    Default Re: Help rs485 :)

    Lets try it this way:

    You can use the USB port but you have to use a USB to RS485 adapter. (as chelmuth said, see post #13)

    This adapter converts the data from the USB protocol into the serial protocol and sends it out RS485 (a transmission method not a protocol)

    So it is much more than just re-assigning wire pinouts
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  5. #25
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    Default Re: Help rs485 :)

    Quote Originally Posted by chelmuth View Post
    Refer to post #13..
    nice good price too....but what i am not getting is we keep using a serial port to convert to a 6 wire screw type out. Why? when i can configure a cat5 cable with a usb male socket end and a rj45 modular socket to do the with the same wire configuration....the more i know it seems the more i am getting lost why am i not getting this simple thing lmao...thanks all for being patient
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  6. #26
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    Default Re: Help rs485 :)

    Quote Originally Posted by RavingLunatic View Post
    Lets try it this way:

    You can use the USB port but you have to use a USB to RS485 adapter. (as chelmuth said, see post #13)

    This adapter converts the data from the USB protocol into the serial protocol and sends it out RS485 (a transmission method not a protocol)

    So it is much more than just re-assigning wire pinouts
    so these adapters that are used in the rs485 configuration are not just sockets connected end to end? so there is something inside that converts inside what looks like the serial cable?
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  7. #27
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    Default Re: Help rs485 :)

    Now you get it
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  8. #28
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    Default Re: Help rs485 :)

    The USB-RS485 Adapter is MORE than a just changine the wire pin-out it has chips in it that convert the USB Protocol to Serial Protocal as RavingLunatic said.. See attached picture..
    Attached Images Attached Images

  9. #29
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    Default Re: Help rs485 :)

    Quote Originally Posted by RavingLunatic View Post
    Now you get it
    holy crap 27 post later .... god help you guys when i have questions about VIXEN lmao...it all makes sense now...
    ....one last question....can that signal be split or would i need another usb-rs485 adapter?
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    1 - E682 not in use
    248 - Renardss Dimmable channels
    144 - Renard48lsd channels
    272 - channels in use
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    50% assembled and displayed

  10. #30
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    Default Re: Help rs485 :)

    Quote Originally Posted by griffixdc View Post
    so these adapters that are used in the rs485 configuration are not just sockets connected end to end? so there is something inside that converts inside what looks like the serial cable?
    Yes, its like this. If you spoke only English and I spoke only Japanese we would need more than two tin cans and a piece of string to talk to each other.

    wow 4 posts late I guess I need to learn to hit refresh before submit
    Last edited by tstraub; 02-19-2011 at 09:57 PM.
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