AA21-401 Remote Cabin PA System
SM34 Installation and Operation Manual Supplement
Page 2
Mar 23, 2009
SM Supplement Rev: 1.01
ENG-FORM: 810-0111.DOT
CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD.
Wail Select (On)
Active low 5 mA max
Yelp Select (On)
Active low 5 mA max
Wail Siren Select (Return)
Active low 5 mA max
Yelp Siren Select (Return)
Active low 5 mA max
Pot Wiper
0 to 10 kOhm
±
10% (referenced to Pot Lo)
Output signals
+28VDC Power
3 Amps maximum current.
Pot Hi
10 kOhm
±
10% (referenced to Pot Lo)
Pot Lo
1.3 Physical
Specifications
Height
1.15" (29.2 mm) max
Depth
7.32" (185.9 mm) max
Width
5.05" (128.2 mm) max
Weight
1.31 lbs. max
Mounting
Bulkhead mount with four 10-32 screws
Material/Finish
Chassis/cover
5052-H32 brushed aluminium with chromate conversion
finish.
Heat sinks
De-burred 6061-T6 aluminium with chromate
conversion, mounted along each side of unit.
Connectors
Male filtered 25 pin D-subminiature with Positronics V5
locking tabs.
Female filtered 25 pin D-subminiature with Positronics
V5 locking tabs.
Install Kits
One D25SV-IKC and one D25PV-IKC
(See section 2.1 below.)
1.4 Environmental
Specifications
The AA21-401 is identical to the AA21-400, with the following exception:
Altitude 55,000
ft.
Section 2 Installation
For installation information and drawings, see
SM34
Section 2. Select the appropriate revision of the
drawing for the serial number of the unit. The drawings specific to this derivative are listed below and can
be found at the end of this supplement.
The AA21-401 is a remote mount unit, intended for installation in an enclosed avionics bay. The note to
installers in SM34 Section 2.3.1 does not apply to the AA21-401.
23-31-90
The document reference is online, please check the correspondence between the online documentation and the printed version.
