jason5d Posted September 16, 2017 Share Posted September 16, 2017 where can I get a 4xdmx to cat5 box in the uk like this : https://www.thomann.de/gb/stairville_rj45_dmx_shuttle_snake_mx4.htm?ref=prod_rel_368415_1 thanks Link to comment Share on other sites More sharing options...
Cameroon Posted September 16, 2017 Share Posted September 16, 2017 Thomann ship to the UK? Link to comment Share on other sites More sharing options...
maeterlinck Posted September 16, 2017 Share Posted September 16, 2017 If you can't wait 4 days for it to come back in to stock then it would be easy to make. Link to comment Share on other sites More sharing options...
bigclive Posted September 16, 2017 Share Posted September 16, 2017 If it's just using standard CAT5 cable with four twisted pairs then how is it giving continuity of the ground connection? Is it using some sort of baluns system? I'm not even sure that would work with data. Or are they just ditching the ground on each channel. Link to comment Share on other sites More sharing options...
Young Johnstone Posted September 16, 2017 Share Posted September 16, 2017 TMB sell a 5 pin version too, not sure how much though. Link to comment Share on other sites More sharing options...
david.elsbury Posted September 16, 2017 Share Posted September 16, 2017 Clive, generally they use the ground on an STP cable as a common ground across all 4 channels Link to comment Share on other sites More sharing options...
bruce Posted September 16, 2017 Share Posted September 16, 2017 If it's just using standard CAT5 cable with four twisted pairs then how is it giving continuity of the ground connection? Is it using some sort of baluns system? I'm not even sure that would work with data. Or are they just ditching the ground on each channel. They’re assuming you’re using screened cat5, and running the ground down the screen. No baluns or anything like that. There’s a wiring diagram further down the page... There’s also a cheaper version in a box, no flying leads, which is in stock...https://www.thomann.de/gb/stairville_rj45_dmx_split_box_fx4.htm Link to comment Share on other sites More sharing options...
bigclive Posted September 16, 2017 Share Posted September 16, 2017 Clive, generally they use the ground on an STP cable as a common ground across all 4 channels Ah, that would work. I wonder how many people will use it with cheap UTP though. Link to comment Share on other sites More sharing options...
Tom Young Posted September 17, 2017 Share Posted September 17, 2017 TMB sell a 5XLR version in the UK (which I think was actually the original), called a "Sneak Snake". http://www.tmb.com/products/82-sneak-snake Link to comment Share on other sites More sharing options...
timsabre Posted September 17, 2017 Share Posted September 17, 2017 4 xlr not 5. The annoying thing about that one is that it does not make clear on the website that you need shielded cat 5 cable (it is mentioned in the instructions). The trouble is that DMX will work without the ground, but it will be unpredictable and unreliable. So if you don't read the instructions properly you could set it up with UTP cable then the whole thing will randomly stop working during the event. The 3-xlr version they do is a much better idea because you can use UTP or STP. Link to comment Share on other sites More sharing options...
Tom Young Posted September 17, 2017 Share Posted September 17, 2017 4 xlr not 5. The annoying thing about that one is that it does not make clear on the website that you need shielded cat 5 cable (it is mentioned in the instructions).I was referring to the connector rather than how many of them there are. (As in 5XLR connectors rather than 4 x XLR.) Apologies, maybe I should've been clearer. The Starville one is only 3XLR connectors rather than the usual 5XLR for DMX. Link to comment Share on other sites More sharing options...
timsabre Posted September 17, 2017 Share Posted September 17, 2017 I was referring to the connector rather than how many of them there are. (As in 5XLR connectors rather than 4 x XLR.) Apologies, maybe I should've been clearer. The Starville one is only 3XLR connectors rather than the usual 5XLR for DMX.Ah sorry I misunderstood... the convention I have seen for pin numbers is to put them at the end, e.g. a 5 pin XLR would be shown as XLR5. Link to comment Share on other sites More sharing options...
dbuckley Posted September 18, 2017 Share Posted September 18, 2017 Must get some of that bule-coloured wire. Link to comment Share on other sites More sharing options...
sleah Posted September 18, 2017 Share Posted September 18, 2017 Clive, generally they use the ground on an STP cable as a common ground across all 4 channels Ah, that would work. I wonder how many people will use it with cheap UTP though. It also somewhat rules out running it via infrastructure..... :( Link to comment Share on other sites More sharing options...
DrV Posted September 18, 2017 Share Posted September 18, 2017 If you had a 4 way adapter at each end and wanted to run via UTP cable you could, as a bodge, plug a shorting connector in each end of one of the ways (pins 1 short to 2 and/or 3). This would give you a ground reference for the 3 other ways. Link to comment Share on other sites More sharing options...
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