Gsu 73; A-3 Rear View Of Connector End Plate - Garmin GDU 370 Installation Manual

A.3 GSU 73
A.3.1 Connector Description
The GSU 73 has one 62-pin connector (J731) and one 78-pin connector (J732) located on the connector
end of the unit, as shown below. J731 and J732 are clearly marked on the connector end plate.
A.3.2 Pin List
A.3.2.1 P731 Connector
Figure A-4 Rear Connector J731 Viewed from Connector End of Unit
J731 pins are configured as shown in preceding figure. J731 pin assignments are given in the following
table, additional tables group pin connections by function.
Pin Pin Name
1 MAGNETOMETER RS-485 IN B
2 MAGNETOMETER RS-485 IN A
3 SIGNAL GROUND
4 GSU SYSTEM ID PROGRAM* 1
5 GSU SYSTEM ID PROGRAM* 2
6 RESERVED
7 CAN BUS HI
8 CAN BUS LO
9 DISCRETE IN* 1
10 DISCRETE IN* 2
11 DISCRETE IN* 3
12 DISCRETE IN* 4
13 DISCRETE OUT* 1
14 DISCRETE OUT* 2
15 MAGNETOMETER RS-232 OUT
* Indicates Active Low
Page A-6
Revision A
Figure A-3 Rear View of Connector End Plate
J732
J731
G3X Installation Manual – Pinouts
I/O
In
In
--
In
In
--
I/O
I/O
In
In
In
In
Out
Out
Out
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