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3.4.4
Mode Switches
3.4.4.1
Siren Mode
The siren mode switch is a three position, centre-off locking switch on the front of the AA21-400. The siren
is operated by selecting the mode (YELP or WAIL) and then activating a remote Siren key. The siren will
sound only as long as the mode is selected to WAIL or YELP and the Siren key is activated. It should be
noted that in some installations, the remote Siren key is connected directly to ground. In this case, the siren
will sound as soon as either YELP or WAIL is selected.
Note:
Siren audio is only available when the INT/EXT switch is selected to EXT. (See section 3.4.4.2.)
3.4.4.2
Internal/External Mode Switch
The INT/EXT mode switch is a two position locking switch that routes the selected audio either to the internal
8 speaker (INT) or to the PA via an amplifier such as the PA250/700 or PA110/220 (EXT).
3.4.5
Remote Power Switch
The AA21-400 provides a switched 28 Vdc low current output that is typically used to control the dc power
circuit of an PA110, PA220, PA250 or PA700.
Note: This output is only available when the power switch is in the ON position.
Build Standard: 5.00
ENG-FORM: 806-0100.DOTX
CONFIDENTIAL AND PROPRIETARY TO ANODYNE ELECTRONICS MANUFACTURING CORP.
AA21-400 Cabin PA System
SM34 Installation and Operation Manual
Siren Mode Switch
Internal/External Mode Switch
End of Section 3.0
Nov 09, 2016
Page 3-3
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