Gsu 73; J731 Connector; Rear View Of Connector End Plate; J731 On Gsu 73, As Viewed Looking At Connector On Unit - Garmin G3X Installation Manual

15.8 GSU 73

15.8.1 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.

15.8.2 J731 Connector

Figure 15-14 J731 on GSU 73, as viewed looking at connector on 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
1 MAGNETOMETER RS-485 IN B
2 MAGNETOMETER RS-485 IN A
3 SIGNAL GROUND
4 RESERVED
5 RESERVED
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
*Indicates Active Low
G3X Installation Manual - LRU Pinouts
Page 15-34
Figure 15-13 Rear View of Connector End Plate
Pin Name I/O
In
In
--
--
--
--
I/O
I/O
In
In
In
In
190-01115-01
Rev. L