Anyone provided three DMX signals over a single CAT5?

The standard model for using CAT5 for DMX has a pair unused. Has anyone tried putting a third DMX signal on the unused pair and sharing a ground with DMX-1 or DMX-2? Really bad idea to share the ground?

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marcusbirkin over 6 years ago

You'll find that most mutliport DMX products share the ground reference pins, so I don't see any issue with this.
There shouldn't be any issue with using the spare blue pair, so long as you remember it's a non-standard pinout and don't directly connect this to something that would care!

There is also a company that supplies adaptors to do just this, even achieving 4 universes with STP cable!: pub.tmb.com/.../SneakSnake-LTR-web.pdf
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marcusbirkin over 6 years ago

You'll find that most mutliport DMX products share the ground reference pins, so I don't see any issue with this.
There shouldn't be any issue with using the spare blue pair, so long as you remember it's a non-standard pinout and don't directly connect this to something that would care!

There is also a company that supplies adaptors to do just this, even achieving 4 universes with STP cable!: pub.tmb.com/.../SneakSnake-LTR-web.pdf
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pnaecker over 6 years ago in reply to marcusbirkin

Thanks for the clarification. And thanks for the product reference.
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