This device was produced for a large theme park in Paris, France

Title: Custom single universe remote (contact closure) A/B switch with Lockout and seamless transfer.

Description:
This unit was constructed to limit errors on behalf of the guest to the parkwide system and requires programming on the behalf of the parkwide systems to allow control. It consists of a standard Doug Fleenor Design model 221E with custom software and external contact closure circuit via 3pin male XLR.

Function:
Default to "A". The input "A" input has priority over "B" on a channel by channel basis

Contact Closure: Don't allow switch to "B" input unless "B" signal is present and qualified DMX512 with null start code.

Entertainment coming online

Case 1
Parkwide is inputting data into "A"
Entertainment Techs don't have the console on.
The contact closure is closed
The result is no change

Case 2
Parkwide is inputting data into "A"
Entertainment Techs have the console on.
The contact closure is closed
The result is no change

Case 3
Parkwide is inputting data into "A"

Entertainment Techs have the console on.'
The contact closure is closed
Parkwide dips levels on channels that need Entertainment control to 0%
The result is Entertainment gets control of individual channels

Case 4
Parkwide is NOT outputting data into "A"
Entertainment Techs have the console on.
The contact closure is closed
The result is Entertainment gets control of ALL channels

Entertainment going offline depends on how the "Hold Last Look" jumper is positioned.

Case 1
Parkwide brings channels back from dipped state
Contact closure is opened
Result is smooth transfer

Case 2 ("Hold last look" enabled)
Contact closure opened
Parkwide not present on "A"
Result is last look from "B"

Case 3 ("Hold last look" not enabled)
Contact closure opened
Parkwide not present on "A"

Result is switch output stops making DMX and dimming system begins to hold last look if option enabled on Sensor system