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4
D
AIRCRAFT POWER
AIRCRAFT GROUND
8 OHM AUDIO OUT
AUDIO OUTPUT COMMON
C
AUDIO OUTPUT COMMON
500 OHM AUDIO OUT
500 OHM 25mW STRAP
500 OHM 150mW STRAP
4
STRAPPING COMMON
B
AUDIO OUTPUT COMMON
500 OHM AUDIO OUT
500 OHM 25mW STRAP
500 OHM 150mW STRAP
4
STRAPPING COMMON
A
4
3
P
P2
HTAWS
1/9
3A
ST1A20
1
3/11
P2
4
ST8A22
5
P3
5
9
ST8A22
8
TCAS AUDIO
3
6
2
HTAWS PWR
P2-8 (TCAS INH)
AUDIO MIXER
NAT AA35-100
J101
P3
ST8A22
5
24
LO
CH 2 IN
5
9
HI
3
18
HI
COMP OUT
8
37
LO
3
19
SHLD
6
ST8B22
3
2
AVIONICS POWER BUS
AUDIO PANEL
HI
UNSWITCHED AUDIO IN
LO
2
AUDIO PANEL
HI
UNSWITCHED AUDIO IN
LO
2
1
REVISIONS
LTR
DESCRIPTION
A
Initial Release
A1
Title Block Format Change. AR1189
Added P2-9 as a power pin. Added P2-11 as a ground
B
pin. AR1418
AR1416 Typos corrected
C
REDRAWN (AR1477) – Was Sheet 1
D
Added Wire Numbers (various)
Removed "POWER" by CB, changed Note 1, added
shield ground, and twisted pair (Zone D-3)
Separated Speaker Interface (Zone C-4)
Removed note and added reference to note 2. (Zone B-3)
Changed and revised Note 2 (Zone B-1/2)
Added Interconnection to audio mixer and strapping
(Zone A-3)
Changed Note 3 To Note 4 (Zone A-4) for strapping
Added New Note 3 (Zone A-3)
Note 4 (Zone A-1) is now the strapping note. Ref (Zones
B-4 & A-4)
COMPUTER CONTROLLED DRAWING
DO NOT REVISE MANUALLY
NOTES:
1
USE 20AWG SHIELDED WIRE
2
IF THE AIRCRAFT AUDIO SYSTEM DOES NOT HAVE A SPARE UNSWITCHED
INPUT, AND THE OTHER AUDIO SIGNALS ARE OF THE SAME PRIORITY, ADD A
470-680 OHM RESISTER IN SERIES WITH EACH SOURCE FOR ISOLATION OR
USE A RELAY.
3
IF THE AIRCRAFT AUDIO SYSTEM DOES NOT HAVE A SPARE UNSWITCHED
INPUT, AND THE OTHER AUDIO SIGNALS ARE OF HIGHER OR DIFFERENT
PRIORITY (I.E. LOW ROTOR RPM) USE AN AUDIO MIXER THAT PROVIDES
ADJUSTMENT FOR EACH AUDIO IN ORDER TO ELIMINATE MASKING OF HIGHER
PRIORITY WARNING SIGNALS
4
WHEN USING THE 500 OHM STRAP USE 25mW OR 500mW PINS TO STRAPPING
BUT NOT BOTH
2401 DOGWOOD WAY
VISTA, CA 92081 USA
CATEGORY
ST3400H INSTALLATION DRAWING
TITLE
POWER & AUDIO
SIZE
CAGE CODE
DWG NO.
NONE
SCALE
MOD
1
DATE
04/12/2010
D
07/30/2011
12/12/2013
08/25/2014
03/31/2015
C
B
A
REV
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SHEET
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