Aircraft Power; Demo Mode Selection - Garmin GDU 37X Installation Manual

Pin Pin Name
27 SIGNAL GROUND
28 RESERVED FOR FUTURE DEVELOPMENT, DO NOT USE
29 RS-232 IN 3
30 RS-232 OUT 2
31

AIRCRAFT POWER 2

32 AIRCRAFT POWER 1
33 RESERVED FOR FUTURE DEVELOPMENT, DO NOT USE
34 SIGNAL GROUND
35 SIGNAL GROUND
36 SIGNAL GROUND
37 SIGNAL GROUND
38 SPARE
39 SPARE
40 SPARE
41 SPARE
42 CDU SYSTEM ID PROGRAM* 4
43 14V LIGHTING BUS HI
44 SIGNAL GROUND
45 RESERVED FOR FUTURE DEVELOPMENT, DO NOT USE
46 RESERVED FOR FUTURE DEVELOPMENT, DO NOT USE
47 RS-232 IN 1
48 RS-232 OUT 1
49 RESERVED FOR FUTURE DEVELOPMENT, DO NOT USE
50 RESERVED FOR FUTURE DEVELOPMENT, DO NOT USE
* Indicates Active Low
A.1.2 Aircraft Power
AIRCRAFT POWER 1 AND AIRCRAFT POWER 2 are "diode ORed" to provide aircraft power
redundancy. Use 22 AWG wire (min) for all power and ground connections.
Pin Name
AIRCRAFT POWER 1
AIRCRAFT POWER 2
POWER GROUND
POWER GROUND
A.1.3 Demo Mode Selection
Demo mode is for in-store demonstration use only, never ground pin 42 in an aircraft installation.
PFD MODE 4
(P3701, Pin 42)
Page A-2
Revision C
Open
Ground
Connector Pin
P3701 32
P3701 31
P3701 15
P3701 16
DISPLAY MODE
MFD
DEMO
GDU 37X Installation Manual
I/O
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In
Out
In
In
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In
In
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In
Out
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I/O
In
In
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190-01054-01