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Control/Dimming LC2412 DMX Setup

Discussion in 'Lighting and Electrics' started by wannabe1, Jul 21, 2009.

  1. wannabe1

    wannabe1 New Member

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    I am trying to setup a Behringer LC2412 with ColorKey LED par cans. The lights are selectable 3 or 6 channel DMX but the board is only 3 channel DMX. I found that I can assign two board channels to the same light and use one fader for DMX 001, 002, 003 and the second fader to use DMX 004, 005, 006. On the colorkey lights, DMX channels 004, 005 & 006 override the first three channels. In effect I can use the first fader to fade white light at any level as long as the second fader is all the way down. The second fader will control the advanced light functions depending of fader position. As I move the fader up the light changes from solid red to green to blue then flashes each color then auto fades through the colors, etc.
    Is this normal and is it desirable to set up the board this way?
    Also, do I need to terminate the last can with a XLR plug and resistor as mentioned in the manual?

    Thanks
  2. len

    len Well-Known Member

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    From my skimming of the behringer website, that board can run 512 channels of dmx. I think you're confused by it saying "up to 3 dmx channels per preset channel" which means that you can have three channels on one fader channel, but I don't think that's what you want to do. Depending on your end goal, there's a number of ways to set that up, so you'll probably need to explain that in a little more detail.

    I have those fixtures and a similar, Elation board and just use the top 12 faders for 4 sets of 3 channel mode or two sets of 6 channels mode, the bottom 12 faders I keep for other fixtures such as dimmers.

    Also, those fixtures can be set to a 3-channel mode, which means you have individual control over red, green, and blue, but you can't strobe or use the on-board color palette, etc. To set them to 3-channel mode press the Mode button and a small dot will appear below the dmx address.
  3. wannabe1

    wannabe1 New Member

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    Yea, thats is what I thought but my issue is that I need to control 11 fixtures with only 24 board channels to work with. This is all being setup in a church so the typical requirement will be to assign three DMX channels to each fader for white light and just re-assign DMX channels for special events. Am I on track that this would be the typical setup or do I need to be looking for a larger control board?
    Also, do I need to terminate the last fixture?

    Thanks
  4. derekleffew

    derekleffew Senior Team Senior Team Premium Member

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  5. wannabe1

    wannabe1 New Member

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    Got it! Thx.
  6. len

    len Well-Known Member

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    If you're using 11 fixtures in a church setting, my guess is you don't plan on strobing them a lot. So I'd either set them to 4 distinct addresses in 6 channel mode (6 x 4 = 24) or set them to 4 distinct fixtures in 3 channel mode and use the other 12 channels for presets, etc. With some trial and error you can generate a wider range of colors just using the RGB than using the built in color picker. Then make up a sheet indicating RGB values for more common colors (red, pink, lav, orange, amber, etc.) so that the novice operator will have an easier time of it.

    But reading the controller manual might reveal an easier way to get individual control over all of them. I just don't know that board at all so I couldn't make any suggestions as to its capabilities.

    BTW, I find that a decent (not great, but decent) white with the most output is achieved by R @ 100%, G @ 100% and B at about 30%. The older version the blue diodes seemed less powerful so I run them at about 40% for white.
    wannabe1 and (deleted member) like this.
  7. wannabe1

    wannabe1 New Member

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    Got it all setup and running now! It is a little blue on stage even with the settings mentioned above. With the blue down to 40% the light output is a lot less as well so looks like I'll be adding a couple more lights to the system in the near future.

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