In case of sounders triggered by removing 0V (com-
mon) from the trigger input, a reversed output polarity
configuration shall be used
➔ Detailed information on the sounder triggering can
be found in its accompanying documentation.
7.3.4.3 Sirens triggered with “+12V” signal
Some sounders do require triggering by applying
“+12V” signal. In case of PRiMA panels, such a configu-
ration requires using an external relay.
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