Not Seen This Before, Have You?

Discussion in 'Lighting and Electrics' started by Joseph Schwartz, Oct 14, 2019.

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  1. Joseph Schwartz

    Joseph Schwartz Member

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    The theater where I just closed a show had a cable I’ve not seen before. A well respected community theater company near Philadelphia has a Leviton 7xxx system. The cables running to the dimmer packs looked like mike cables, but one end had a second XLR connector coming out, a Y connection. The cannon plug on the end with only one XLR had five pins. The documentation specifies five and three pin connections. Standard coax ran between the connectors. The spice had a lot of electrical tape. I couldn’t get close enough to inspect thoroughly. Things seem to work OK but they want to add a sixth dimmer pack. They’ll need to connect the new pack to the dimmer. Does Leviton make this coax Y cable? Some one else? Or was it home made?
     
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  2. DaveySimps

    DaveySimps CBMod CB Mods Premium Member

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    Welcome to CB! I am moving this thread to the Lighting and Electrics forum so it is posted in the right place.

    When you get a moment, drop back by the New Member Board to introduce yourself.

    ~Dave
     
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  3. Amiers

    Amiers Renting to Corporate One Fixture at a Time.

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    Sounds like a homemade 3-5 pin y using one cable for 2 home runs.
     
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  4. jonliles

    jonliles Well-Known Member Fight Leukemia

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    The Leviton 3 pin should be MUX, similar to the NSI (who was bought out by Leviton) MUX. Do not plug MUX into DMX, you'll kill your DMX chipset. The MUS xhould be daisy cahined Boad to pack to pack to pack , but doesnt need a terminator like a DMX system would. The NSI MC7XXXX series boards often had analog/mux/dmx all on the same board.

    Model numbers and photos would help in trouble shoot.
     
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  5. RonHebbard

    RonHebbard Well-Known Member Premium Member

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  6. Amiers

    Amiers Renting to Corporate One Fixture at a Time.

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    I grew up ETC with dmx not MUX so this one is outta my wheelhouse.
     
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  7. RonHebbard

    RonHebbard Well-Known Member Premium Member

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  8. jonliles

    jonliles Well-Known Member Fight Leukemia

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    Yes, they did. 5V I believe. Just enough to fry the transceiver DMX chipsets. This may have been the voice of experience (oops)
     
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  9. microstar

    microstar Well-Known Member

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    it's actually +15vdc on Pin 2. Probably more than enough to fry the DMX chip.
     
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  10. jonliles

    jonliles Well-Known Member Fight Leukemia

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    Sadly, I learned this from experience. Luckily, it was an easy chip to replace.
     
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  11. microstar

    microstar Well-Known Member

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    I learned this when "a student" plugged the Clearcom line (+24vdc on Pin 2) into a Microplex console. Amazingly just blew up a capacitor in the NSI console if I recall.
    Got away really lucky.
     
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  12. ship

    ship Senior Team Emeritus Premium Member

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    The common thing - even if not labeled, is to try to ship such a thing back to it's owner. This by way of contacting them and requesting shipping info, or if they don't want it back... normally i would save it in a place I can find it - once figured out what it was. If not really viable to save and find it again, it would be assimilated into parts. Primary thing in good will - you ship to me, we ship to you concept... Get the parts someone else owns back to them and they will for you. In my case, I really don't want other people's gear as it takes time away from fixing our own gear in if necessary and safe/useful... making ours.
     
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