Garmin GMA 342 Installation Manual page 46

4.6.2 COM Audio and Mic Keys
Table 4-7 COM Audio and Mic Keys (GMA 342/345 2-COM unit only)
Pin Connector
12 J3401
30 J3401
9 J3401
11 J3401
10 J3401
13 J3401
15 J3401
14 J3401
*Denotes Active Low (grounded when active)
Table 4-8 COM Audio and Mic Keys (GMA 345 3-COM unit only)
Pin Connector
3 J3401
4 J3401
5 J3401
6 J3401
*Denotes Active Low (grounded when active)
4.6.3 Alert Audio I/O
Pin Connector
31 J3401
32 J3401
15 J3402
14 J3402
29 J3401
43 J3401
190-01878-02
Rev. 5
Pin Name
COM 1 MIC KEY* OUT
COM 2 MIC KEY* OUT
COM 1 AUDIO IN HI
COM 1 MIC AUDIO OUT HI
COM 1 AUDIO LO
COM 2 AUDIO IN HI
COM 2 MIC AUDIO OUT HI
COM 2 AUDIO LO
Pin Name
COM 3 AUDIO IN
COM 3 AUDIO LO
COM 3 MIC OUT
COM 3 MIC KEY* OUT
Table 4-9 Alert Audio I/O
Pin Name
ALERT 1 AUDIO IN HI
ALERT 1 AUDIO IN LO
ALERT 2 AUDIO IN HI
ALERT 2 LO, FAILSAFE AUDIO
IN LO
ALERT 3 AUDIO IN HI
ALERT 3, 4, AUX 3 AUDIO IN LO
Description
Enables transmission on the
respective transceiver unit
COM 1 Audio Input
COM 1 Audio Output
Ground Reference for COM 1
COM 2 Audio Input
COM 2 Audio Output
Ground Reference for COM 2
Description
COM 3 Audio Input
(GMA 345 3-COM unit only)
Ground Reference for COM 1
(GMA 345 3-COM unit only)
COM 3 Audio Output
(GMA 345 3-COM unit only)
Enables transmission on the
respective transceiver unit
(GMA 345 3-COM unit only)
Description
Alert 1 Audio Input
Ground Reference for Alert 1
Alert 2 Audio Input
Ground Reference for Alert 2
Alert 3 Audio Input
Ground Reference for Alert 3 & 4
GMA 342/345 Installation Manual
I/O
OUT
OUT
IN
OUT
--
IN
OUT
--
I/O
IN
--
OUT
OUT
I/O
IN
--
IN
IN
--
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