Submaster unconditionally off triggered by a Macro

Hello,   

I have handfuls of Submasters used by several students and staff throughout the day.   

They are triggered manually by the pushbutton on the ELE2, and/or by macros, and/or by touchscreen Magic Sheets.

How do I write a macro to turn off every Submaster, unconditionally, no matter what state it starts at?

Thanks for any input.

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