Garmin GDU 370 Installation Manual page 139

A.3.5 Serial Data Electrical Characteristics
A.3.5.1 ARINC 429 Input/Output
The ARINC 429 outputs conform to ARINC 429 electrical specifications when loaded with up to 5
standard ARINC 429 receivers.
Pin Connector
20 P731
21 P731
22 P731
23 P731
25 P731
26 P731
27 P731
28 P731
30 P731
31 P731
32 P731
33 P731
A.3.5.2 RS-232 Input/Output
The RS-232 outputs conform to EIA Standard RS-232C with an output voltage swing of at least ±5V
when driving a standard RS-232 load.
Pin Connector
15 P731
16 P731
17 P731
18 P731
19 P731
G3X Installation Manual – Pinouts
190-01115-01
Pin Name
ARINC 429 OUT 1A
ARINC 429 OUT 1B
ARINC 429 OUT 2A
ARINC 429 OUT 2B
ARINC 429 IN 1A
ARINC 429 IN 1B
ARINC 429 IN 2A
ARINC 429 IN 2B
ARINC 429 IN 3A
ARINC 429 IN 3B
ARINC 429 IN 4A
ARINC 429 IN 4B
Pin Name
MAGNETOMETER RS-232 OUT
RS-232 IN 2
RS-232 OUT 2
RS-232 IN 3
RS-232 OUT 3
I/O
OUT
OUT
OUT
OUT
IN
IN
IN
IN
IN
IN
IN
IN
I/O
OUT
IN
OUT
IN
OUT
Page A-11
Revision A