The EMER-3312 Emergency Overriding Module main functionality is to provide the necessary speaker overriding voltage to any of the 10 speaker zones, through interpreting the data signal from the EMIX EMZS-3310/A Speaker Zone Selector.
The speaker overriding voltage is a 24VDC that is usually used in energizing relays to bypass external volume control unit. Finally, the EMLS-3305 can be powered through the usual 24Vdc.