Chauvet (4) Chauvet Led Par 56-24c 7 Channel Dmx Par Lights Logo
Anonymous Posted on Apr 28, 2011

Using 24 chauvet par 56 led and chauvet obey 40. when going to bank 5, 6 or even 11, some fixtures will remain on while some will flicker. 2 fixtures per channel on the console. DMX addess starting at 1 then 17, 33 and so on. 12 fixtures linked together on 1 power source and the remaining 12 on another power source. all fixtures respond to the dmx addressing except one. dip switch 11 does not work while all remaing fixtures have dip switch set to 11 and the fixture dmx address. One fixture when set to 11 does not work. The fixture responds to the dms address and the console channel if the switch 11 is set to the off position. please help.

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Fred Yearian

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  • Chauvet Master 5,603 Answers
  • Posted on Apr 28, 2011
Fred Yearian
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Read about terminating the chain with a resistor 120 ohms. If your run has appreciable length, a termination MAY be necessary to avoid digital reflections that can corrupt the message between the control and the lights. Having separate power sources CAN subject the units to "ground bounce" that can also corrupt the digital control. You need to power all the units from a single source or conditioner if possible. Another solution might be to use one of the DMX radio links which would isolate the ground problem. Another fix you MIGHT try is to get some of the clamsheel ferrite devices that clamp around the wires. Put these around the digital cables, not the power cords:

http://www.google.com/products/catalog?hl=en&sugexp=ldymls&xhr=t&q=ferrite+core&cp=8&bav=on.2,or.r_gc.r_pw.&wrapid=tljp1304006132890014&um=1&ie=UTF-8&cid=761843538070174409&sa=X&ei=-Y25TaXFGsjYiALh_8ky&sqi=2&ved=0CFEQ8wIwAw#

Testimonial: "Thanks fredy2 !!!!"

  • Anonymous Apr 28, 2011

    Thanks fredy2....I forgot to include in the notes above that I am using a terminator. It may also be possible that the fixture may not like the DMX address I gave it or it may just be that the fixture does not want to play nice any more. I going to add that fixture to the end of the chain and place the terminator on that one to see if it does the trick. Thanks again for your thoughts.

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