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CAT5 pins for dmx data transmission

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ATController View Drop Down
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  Quote ATController Quote  Post ReplyReply Direct Link To This Post Topic: CAT5 pins for dmx data transmission
    Posted: 12 Mar 2011 at 8:25am
First I'm extremely new to DMX, I'm contemplating a project shown at HolidayCoro.com under the corostar assembly instructions;RGB corostars.  In using Aurora DMX, which CAT5 pins are used for the DMX data transmission?  Just so I understand this whole process I can use the D-Light usb dongle to interface the described DMX Module in their instructions to control the rgb lights? 

Thanks for any feedback on this subject
Kevin


Edited by ATController - 12 Mar 2011 at 8:26am
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deweycooter View Drop Down
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  Quote deweycooter Quote  Post ReplyReply Direct Link To This Post Posted: 14 Mar 2011 at 11:14pm
You need to build a standard ethernet cable, but switch wires 1&2 with 4&5 on one end.

http://diylightanimation.com/wiki/index.php?title=Image:DLA-RJ45-wiring.jpg
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JonB256 View Drop Down
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  Quote JonB256 Quote  Post ReplyReply Direct Link To This Post Posted: 26 Mar 2011 at 9:05am
For the existing controllers out there using CAT5, Pins 1 and 2 (Lynx Express, specifically), the "Data -" is on the Orange wire (Pin 2) and the "Data +" is on the White/Orange wire (Pin 1).

The LOR and D-Light boards use Pins 4 and 5, but "Data -" is on Pin 4 and "Data +" in on Pin 5.

So you have to build a "crossover" with a "crossover" since DMX is polarity sensitive. (i.e., Pin 1 to Pin 5 and Pin 2 to Pin 4)

Edited by JonB256 - 26 Mar 2011 at 9:07am
JonB - D-Light user
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deweycooter View Drop Down
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  Quote deweycooter Quote  Post ReplyReply Direct Link To This Post Posted: 28 Mar 2011 at 10:38am
hmm, that's interesting.  I'll have to double check how I did it.  I don't remember crossing them.
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ChrisL1976 View Drop Down
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  Quote ChrisL1976 Quote  Post ReplyReply Direct Link To This Post Posted: 28 Mar 2011 at 11:24am
I moved Pin 1 to pin 4 and pin 2 to pin 5 and vice versa
Chris

www.lightsonsixth.com
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JonB256 View Drop Down
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  Quote JonB256 Quote  Post ReplyReply Direct Link To This Post Posted: 30 Mar 2011 at 5:52am
I just looked at my working adapter and it is 1 to 5 and 2 to 4. If I get a chance, I'll make another going from 1 to 4 and 2 to 5 to see if also works. (I think I did that a few months ago but can't be positive)
JonB - D-Light user
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