Serial Data; Lighting; Audio - Garmin GDU 37X Installation Manual

A.1.4 Serial Data
A.1.4.1 RS-232
3 Channels of RS-232 I/O data.
Pin Name
RS-232 IN 1
RS-232 OUT 1
RS-232 IN 2
RS-232 OUT 2
RS-232 IN 3
RS-232 OUT 3
A.1.5 Lighting
The GDU 37X display and keys can be configured to track 28 VDC or 14 VDC lighting busses using these
inputs.
Pin Name
14V LIGHTING BUS HI
28V LIGHTING BUS HI
A.1.6 Audio
A.1.6.1 Mono Audio
Pin Name
MONO AUDIO OUT HI
MONO AUDIO OUT LO
A.1.6.2
A.1.6.3 Stereo Audio
Pin Name
STEREO AUDIO OUT LEFT
STEREO AUDIO OUT LO*
STEREO AUDIO OUT RIGHT
STEREO AUDIO OUT LO*
*The left and right common pins (pins 2 and 20) may be tied together or only one may be used. It is not
necessary to use both common pins.
GDU 37X Installation Manual
190-01054-01
Connector Pin
P3701 47
P3701 48
P3701 14
P3701 30
P3701 29
P3701 13
Connector Pin
P3701 43
P3701 26
Connector Pin
P3701 1
P3701 18
Connector Pin
P3701 3
P3701 20
P3701 19
P3701 2
I/O
In
Out
In
Out
In
Out
I/O
In
In
I/O
Out
--
I/O
Out
--
Out
--
Page A-3
Revision C