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Emergency tones (Alert and Evacuation)
The Alert and evacuation tones conform to Australian Standards AS1670.4 and are used to notify building occupants of an emergency situation.
Alert: The Alert tone is activated by a closing contact on the ALERT trigger (Trigger10) and can be used in Alternate or Momentary setup as mentioned.
The Alert tone comes with a change over option which forces the A 1720A to switch from Alert to the Evacuation tone after a prescribed time. Use the
BCD switch to adjust this time or switch off completely (see table 2).
Evacuation: The Evacuation tone is activated by a closing contact on the Evac trigger (Trigger9) and can be used in Alternate or Momentary setup as
mentioned early in the instructions.
Evacuation message: A message (repeated twice) can be inserted every three evacuation cycles as per the Australian Standards. Voice message
could be something like "please evacuate the building by the closest exit". To install a Evacuation message on the A 1720A follow the Step by step guide
to put a MP3 into Trigger1 with Windows XP installed PC but replace Trigger1 with Voice i.e. put the message into the Voice folder on the SD card and
delete any other MP3 file located in the voice folder.
Priority: The Emergency tones have priority over other triggers (1 to 8) and if activated will stop any other MP3 and activate the selected emergency
tone. Evacuation also has priority over Alert.
Troubleshooting
NO Power (Power LED does not illuminate):
Power supply voltage is 12-30VDC.
Power supply is a DC input, not AC.
Emergency tones do not work:
Switch DIP1 switch 2 ON to activate emergency tones.
Specifications
Power supply: ............................................12VDC to 30VDC 300mA (idle/maximum current draw 50mA)
Output: ............................................................................................................Stereo RCA 500mV nominal
MP3 sample rate: ..............................................................................................................................44kHz
SD card size: ......................................................................................................................256MB to 16GB
Trigger Activation: ..............................................................................................................Closing contact
MP3 info:
Length/size: ....................................Limited by card size (100mins @ 128kbps, 44kHz on supplied 1GB)
Bit rate: ..........................................................................All standard MP3 rates (128kbps recommended)
Sample rate: ......................................................................All standard MP3 rates (44kHz recommended)
Channels: ............................................................................................................................Stereo or mono
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