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Retired Low Voltage installer (Fire, Access, Security)
536 Posts
I was about to post that the annunciator looks a lot like a fire alarm panel; upper LED red for alarm, lower LED yellow for trouble. And like any modern fire alarm system, it will use a supervised Normally Open input. The thing to watch out for is the normal state of the output relay on damper panel; is the relay active when normal, or is it active only when in alarm?
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