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Page A-2 G3X Installation Manual – Pinouts
Revision A 190-01115-01
Connector P3701, continued
Pin Pin Name I/O
33 CONFIG MODULE CLOCK I/O
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 In
43 14V LIGHTING BUS HI In
44 SIGNAL GROUND --
45 CAN BUS LO I/O
46 CAN BUS HI I/O
47 RS-232 IN 1 In
48 RS-232 OUT 1 Out
49 CONFIG MODULE GROUND --
50 CONFIG MODULE DATA I/O
* Indicates Active Low
A.1.2 Aircraft Power
AIRCRAFT POWER 1 and AIRCRAFT POWER 2 are “diode ORed” to provide aircraft power
redundancy.
Pin Name Connector Pin I/O
AIRCRAFT POWER 1 P3701 32 In
AIRCRAFT POWER 2 P3701 31 In
POWER GROUND P3701 15 --
POWER GROUND P3701 16 --
A.1.3 Mode Selections
Configure the GDU 37X units per the following tables. A GDU 37X can be manually placed in
reversionary mode by grounding Pin 25. Grounding pin 42 will place the GDU 37X in Demo mode,
which is for in-store demonstration use only, never ground pin 42 in an aircraft installation.
PFD MODE 1, P3701 Pin 10 PFD MODE 2, P3701 Pin 9 GDU Mode
Open Open
MFD
Ground Open
PFD1
Open Ground
PFD2
Ground Ground
Do Not Use
PFD MODE 3
P3701 Pin 25
GDU Mode
PFD MODE 4
P3701 Pin 42
GDU Mode
Open
Auto Reversionary
Open
Normal Operation
Ground Forced Reversionary Ground Demo Mode