[SML] ETC Sensor Dimmer rack running 120 circuits

[Steven Mclean]

Thanks for all the suggestions.

 I experimented by creating a new show file, creating a 1 to 1 patch.  When
I tested the circuits,(remembering that only about 1 in 5 circuits has a
fixture plugged, the dimmers/circuits seemed to react as expected.  When I
reached address 97 through 102 the architectural lighting (from the
labeled 2nd rack that I found)  that I can see (some are backstage and not
visible from the booth) reacted as expected.  Above that,103... etc lights
labeled in an architectural panel containing what seem to be relays
activated fluorescent worklight, aisle lights & some backstage lights.

But,  the few lights that are connected to catwalk circuits labeled 97
through 120 were NOT independently controlled.  I did NOt notice
whether they might have energized when I activated addresses 1 through 24.
(I should have taken note, but did not).

However,  I am TOLD that these grid circuits SHOULD be able to be
controlled independently from the other 96 grid circuits...but I can't
figure out how.



On Fri, Sep 1, 2023 at 6:06 PM Matthew Breton <theatricalmatt at hotmail.com>
wrote:

> Dimmer doubling is a possibility, but should give you 192 circuits, not
> 120.
>
> Is it possible there's a second rack (perhaps disguised as an
> architectural or relay rack) that's driving those additional 24 circuits?
> Or perhaps some lights -- front of house or in the pit -- are driven by a
> separate rack?
>
>
> Matthew Breton  |   he, him, his
> Design for Theater and Dance
> ------------------------------
> *From:* Stagecraft <stagecraft-bounces at theatrical.net> on behalf of
> Steven Mclean via Stagecraft <stagecraft at theatrical.net>
> *Sent:* Friday, September 1, 2023 12:41 PM
> *To:* Stagecraft <stagecraft at theatrical.net>
> *Cc:* Steven Mclean <stevenjmclean at gmail.com>
> *Subject:* [SML] ETC Sensor Dimmer rack running 120 circuits
>
> As you may know, I began my return to educational theatre last week at a
> small university in central Iowa and have run across something that I am
> confused about regarding the lighting system.  It appears to be an older
> ETC system with a single Sensor rack (96 dimmers).  However, we are somehow
> driving discrete 120 circuits (there are a couple that are labeled as
> duplicates, but not enough to account for the 24 extra circuits)
>
> Can anyone explain how this might work?
> --
> Steven J McLean
> 515-480-8461
> stevenjmclean at gmail.com
> smclean at grandview.edu
> designandtechtheatre.wordpress.com
>


-- 
Steven J McLean
515-480-8461
stevenjmclean at gmail.com
smclean at grandview.edu
designandtechtheatre.wordpress.com
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