WeaveMcQuilt Posted May 30, 2012 Share Posted May 30, 2012 Gentlemen and friends, I come to you in my hour of need, whilst I wait to pull tabs on another night in the theatre. I thought to buy one of these DMX relays, which would do the job I need quite perfectly...(To switch on pracs, strobes, led starcloths... basically anything that could be fired from the desk that didn't require dimming.) Velleman DMX Relay http://www.esr.co.uk/velleman/images/k8072.jpg This Velleman module is nice and cheap and I could box it into an enclosure with IEC In/Out to control whatever I need to control. HOWEVER... For practical purposes, I cannot put this DMX module at the end of a chain so I need it to have a DMX OUT, which it doesn't. I'll already be switching that 3-pin IN for a 5-pin.Am I right in assuming I can just wire the 5-pin IN straight onto a 5-pin OUT?Is that how it's done in DMX fixtures? The only other method I can think to use is to buy a DMX splitter/buffer, but I'm trying to keep my costs down... A buffer would cost me ~£70I need to keep costs for this project under £30. Any input would be mightily appreciated. Kind Regards, Myself. Link to comment Share on other sites More sharing options...
timd Posted May 30, 2012 Share Posted May 30, 2012 Just connect the in and out XLR's pin for pin. You're allowed branches as long as they're short. Link to comment Share on other sites More sharing options...
dmxlights Posted May 30, 2012 Share Posted May 30, 2012 WeaveMcQuilt Milford Instrumenst make one as well and it takes up less space that that one from velleman. http://www.milinst.co.uk/ The board that I am talking about is called "DMX Switch" I have bought a few of them and some other boards from Milford Link to comment Share on other sites More sharing options...
boatman Posted May 30, 2012 Share Posted May 30, 2012 Be aware that the link you gave is for the kit version of that board. Built and tested, it only costs a few pounds more. DMX relay boards are also available from Milford Instruments. Link to comment Share on other sites More sharing options...
Oovis Posted May 31, 2012 Share Posted May 31, 2012 Boatman, the link you posted was exactly the same as dmxlights'. Both link to the home page. Link to comment Share on other sites More sharing options...
timsabre Posted May 31, 2012 Share Posted May 31, 2012 You can't link to individual pages on Milford's site, they use some weird frame based thing. But on either the Velleman or Milford boards, timd's answer is correct, you just wire both an XLR plug and and XLR socket to the board, with pins 1 - 2 - 3 connected together. Link to comment Share on other sites More sharing options...
rossmck Posted May 31, 2012 Share Posted May 31, 2012 Boatman, the link you posted was exactly the same as dmxlights'. Both link to the home page.I'm going to assume these are the two Milford products discussed above 8 Channel Version : http://www.milinst.co.uk/shop/DMX/info/1_493.htm 2 Channel Version : http://www.milinst.co.uk/shop/DMX/info/1_564.htm I've used the 2 channel one before, does exactly what you'd expect really. Link to comment Share on other sites More sharing options...
dmxlights Posted May 31, 2012 Share Posted May 31, 2012 This is the one I was talking about http://www.milinst.co.uk/shop/DMX/info/1_558.htm Link to comment Share on other sites More sharing options...
alistermorton Posted May 31, 2012 Share Posted May 31, 2012 You can't link to individual pages on Milford's site, they use some weird frame based thing. But on either the Velleman or Milford boards, timd's answer is correct, you just wire both an XLR plug and and XLR socket to the board, with pins 1 - 2 - 3 connected together. The Milford Instruments single channel one has a link to enable or disable an on board DMX line terminator so if it's at the end of the chain the link would be closed, if in the middle of the chain it would be open. Link to comment Share on other sites More sharing options...
timsabre Posted May 31, 2012 Share Posted May 31, 2012 The Milford Instruments single channel one has a link to enable or disable an on board DMX line terminator so if it's at the end of the chain the link would be closed, if in the middle of the chain it would be open. Simpler to leave it open and just fit a terminator plug if you need one... Link to comment Share on other sites More sharing options...
alistermorton Posted May 31, 2012 Share Posted May 31, 2012 The Milford Instruments single channel one has a link to enable or disable an on board DMX line terminator so if it's at the end of the chain the link would be closed, if in the middle of the chain it would be open. Simpler to leave it open and just fit a terminator plug if you need one... Indeed; were I using one and boxing it up I'd be inclined to fit a switch to toggle between term/unterm. Link to comment Share on other sites More sharing options...
Pat Posted June 1, 2012 Share Posted June 1, 2012 www.DMX4ALL.DE has a lot of DMX parts. But to connect a DMX in and DMX out , you can link them on the same header. Link to comment Share on other sites More sharing options...
boatman Posted June 1, 2012 Share Posted June 1, 2012 ... Indeed; were I using one and boxing it up I'd be inclined to fit a switch to toggle between term/unterm. In which case it should be a two pole change-over switch so that the DMX out socket is completely disconnected when the termination is present. That way there's no chance of double terminating the line. Link to comment Share on other sites More sharing options...
alistermorton Posted June 1, 2012 Share Posted June 1, 2012 ... Indeed; were I using one and boxing it up I'd be inclined to fit a switch to toggle between term/unterm. In which case it should be a two pole change-over switch so that the DMX out socket is completely disconnected when the termination is present. That way there's no chance of double terminating the line. Yup. Link to comment Share on other sites More sharing options...
Affe Posted June 7, 2012 Share Posted June 7, 2012 Hi, Connect it last in the DMX chain and terminate there. If there is no built-in jumper for termination just solder a 150ohm resistor across Data+ and Data- in the cable or on the board. Affe Link to comment Share on other sites More sharing options...
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