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GDU 37X Installation Manual – Pinouts Page A-3
190-01054-01 Revision B
A.1.4 Serial Data
A.1.4.1 RS-232
3 Channels of RS-232 I/O data.
Pin Name Connector Pin I/O
RS-232 IN 1 P3701 47 In
RS-232 OUT 1 P3701 48 Out
RS-232 IN 2 P3701 14 In
RS-232 OUT 2 P3701 30 Out
RS-232 IN 3 P3701 29 In
RS-232 OUT 3 P3701 13 Out
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 Connector Pin I/O
14V LIGHTING BUS HI P3701 43 In
28V LIGHTING BUS HI P3701 26 In
A.1.6 Audio
A.1.6.1 Mono Audio
Pin Name Connector Pin I/O
MONO AUDIO OUT HI P3701 1 Out
MONO AUDIO OUT LO P3701 18 --
A.1.6.2 Stereo Audio
Pin Name Connector Pin I/O
STEREO AUDIO OUT LEFT P3701 3 Out
STEREO AUDIO OUT LO* P3701 20 --
STEREO AUDIO OUT RIGHT P3701 19 Out
STEREO AUDIO OUT LO* P3701 2 --
*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.