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Author
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Topic: Automation + DMX lighting control
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David E. Nedrow
Master Film Handler
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Posts: 368
From: Columbus, OH, USA
Registered: Oct 2008
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posted 06-10-2009 09:34 PM
quote: John Walsh Most dimmers used for theaters are very generic; simply make a connection between two terminals and they operate. The automation must output 'dry' contacts which operate for 'bright' , 'mid' , etc.
Right, and that's how the theatre currently "works".
Basically, we're replacing incandescent (and mechanically "dimmable") wall wash lighting with LED lighting that can't be mechanically dimmed. It requires a DMX protocol command that sets the level of the light. These commands come from a DMX light (or show) controller and are transmitted over a DMX control cable, which is basically a multi-wire cable with XLR connectors.
I know that the automation system we're looking at (Kelmar Series IV with changeover) has dry outputs, etc. I'll probably have to fabricate something to take the high/low from the automation and convert it into a DMX trigger signal that is then sent to the lighting controller, which will then take the appropriate action with the lights. The projection, curtain, and masking would remain under the control of the projection automation. I may be able to leverage pre-existing serial to DMX converters.
I just wondered if anyone had set something like this up before.
DMX512-A Kelmar Series IV
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