EdrickI aspire to tell the story of a lifetimePremium
CAT6 vs. Shielded Pair for Serial / DMX Data
I'm curious, from belden they say using cat5e cable is basically close enough to using a serial rated cable or DMX rated. Do you yourselves ever just use data cable? I'm curious as to what Belden type cable you use in conduit for running DMX or Serial data, is the length limited due to using Cat spec cable?
SmokChsrWho let the magic smoke out?Premium
Saint Augustine, FL
Cat 5, 5e, 6, should work just fine for DMX, but you should use STP (shielded) cat 5 and be sure the shield is properly terminated. The primary reason for the shielding is that you wouldn't want any stray transients getting into and causing false signals on the circuit.
Since DMX is supposed to be a differential signal, it shouldn't cause much cross talk into other system's. With that said shouldn't and doesn't are sometimes two different things, so the shield will help make sure it behaves properly.
ArthurSWatch Those Blinking LightsPremium
|reply to Edrick |
From the USITT:
Unshielded CAT5 is fine for DMX, done it many times in permanent installations. Gives the client the option to upgrade to DMX over Ethernet in the future.
I have also sent serial data over unshielded CAT5 cable, albeit at slower speeds at distances over 100 ft, perhaps having a shield might help. I find shielded twisted pair audio cable is more than adequate for running serial lines for control systems if you don't need any DTR or CTS connections (which are pretty rare in my realm).