Garmin GDU 370 Installation Manual page 131

A.1.4 Serial Data
A.1.4.1 RS-232
The RS-232 outputs conform to EIA Standard RS-232C with an output voltage swing of 0-5V when
driving a standard RS-232 load.
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.1.4.2 CAN Bus
This data bus conforms to the BOSCH standard for Controller Area Network 2.0-B. This bus complies
with ISO 11898. CAN BUS TERMINATION should be connected to CAN BUS LO for the GDU that is
located at the end of the bus (farthest from the GSU 73).
Pin Name
CAN BUS HI
CAN BUS LO
CAN BUS TERMINATION
A.1.4.3 Configuration Module
In multiple GDU 37X installations, it is only necessary to connect a configuration module to PFD1.
Pin Name
CONFIG MODULE CLOCK
CONFIG MODULE DATA
CONFIG MODULE POWER OUT
CONFIG MODULE GROUND
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
G3X Installation Manual – Pinouts
190-01115-01
Connector Pin
P3701 47
P3701 48
P3701 14
P3701 30
P3701 29
P3701 13
Connector Pin
P3701 46
P3701 45
P3701 28
Connector Pin
P3701 33
P3701 50
P3701 17
P3701 49
Connector Pin
P3701 43
P3701 26
Revision A
I/O
In
Out
In
Out
In
Out
I/O
I/O
I/O
--
I/O
I/O
I/O
Out
--
I/O
In
In
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