Garmin GDU 370 Installation Manual page 130

Pin Pin Name
33 CONFIG MODULE CLOCK
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 CAN BUS LO
46 CAN BUS HI
47 RS-232 IN 1
48 RS-232 OUT 1
49 CONFIG MODULE GROUND
50 CONFIG MODULE DATA
* 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
AIRCRAFT POWER 1
AIRCRAFT POWER 2
POWER GROUND
POWER GROUND
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
Open
Ground
Open
Ground
PFD MODE 3
P3701 Pin 25 GDU Mode
Auto Reversionary
Open
Ground Forced Reversionary
Page A-2
Revision A
Connector P3701, continued
PFD MODE 2, P3701 Pin 9
Open
Open
Ground
Ground
Connector
P3701
P3701
P3701
P3701
GDU Mode
MFD
PFD1
PFD2
Do Not Use
PFD MODE 4
P3701 Pin 42 GDU Mode
Normal Operation
Open
Ground Demo Mode
G3X Installation Manual – Pinouts
I/O
I/O
--
--
--
--
--
--
--
--
In
In
--
I/O
I/O
In
Out
--
I/O
Pin I/O
32 In
31 In
15 --
16 --
190-01115-01