Figure B-7 Audio Interconnect - Garmin GI 275 Installation Manual

GI 275
1
6 P2751
AUDIO INHIBIT IN
X
(~DISCRETE IN X*)
AUDIO ACTIVE OUT
X
(~DISCRETE OUT X*)
HI 30
AUDIO OUT
LO 48
s
NOTES
FOR MULTIPLE GI 275 INSTALLATIONS, ONLY CONNECT THE AUDIO OUTPUT AND ASSOCIATED DISCRETE FROM ONE GI 275. LEAVE THE AUDIO OUTPUT AND DISCRETES
1
FROM OTHER GI UNITS UNCONNECTED.
USE THE AUDIO INHIBIT IN DISCRETE INPUT TO INHIBIT GDU GI 275 AURAL ALERTS WHEN A HIGHER PRIORITY SYSTEM IS PLAYING AUDIO MESSAGES.
2
USE THE AUDIO ACTIVE OUT DISCRETE OUTPUT TO INHIBIT AURAL ALERTS FROM LOWER PRIORITY SYSTEMS WHENEVER THE GI 275 IS PLAYING AUDIO MESSAGES.
3
IT IS ACCEPTABLE TO USE OTHER AVAILABLE UNSWITCHED, UNMUTED PORTS. IF AUDIO PANEL DOES NOT HAVE AN AVAILABLE UNSWITCHED INPUT, AUDIO FROM GI 275
MUST BE MIXED WITH AN EXISTING AUDIO SOURCE USING RESISTORS TO ISOLATE THE AUDIO OUTPUT FROM EACH LRU. A TYPICAL VALUE FOR MIXING RESISTORS IS
4
390Ω 1/4 W. THE AUDIO LEVELS OF EXISTING AUDIO SOURCES WILL HAVE TO BE RE-EVALUATED AFTER MIXING RESISTORS ARE INSTALLED.
SHIELDING BETWEEN THE GI 275 AND AUDIO PANEL SHOULD ONLY BE GROUNDED AT THE GI 275. DO NOT GROUND THE SHIELD AT THE AUDIO PANEL.
5
NOT USED.
6
190-02246-14
Rev. 11
GARMIN
2
GMA 342 GMA 35(c)
3
GMA 345 GMA 350(c)
P3401 P3501
31 31
32 32
4 5

Figure B-7 Audio Interconnect

PS Engineering
SL15 PAR PMA6000
GMA 340 GMA 347
SL15M
200 PMA7000
Bottom J1 J3471 J1 Bottom
T 31 54 31
Gnd Lug 32 55 32 Gnd Lug
Bendix/King
PMA KMA 24
KMA 26 KMA 30
KMA 28
8000
J1 Bottom P261 J1
T 31 T 14 31
32 Gnd Lug 31 32
GI 275 STC EIS & MFD Installation Manual
AUDIO PANEL
HI UNSWITCHED
AUDIO IN
LO
Page B-17