Garmin GRS 77 Installation Manual page 34

Pin Pin Name
23 SPARE RS-232 OUT 1
24 POWER GROUND
25 MAGNETOMETER RS-485 IN A
26 GPS 1 RS-232 OUT
27 ARINC 429 OUT 3 B (CDU 1, high-speed)
28 ARINC 429 OUT 2 B (GIA 2, high-speed)
29 ARINC 429 OUT 1 B (GIA 1, high-speed)
30 ARINC 429 IN 1 B (AIR DATA, low-speed)
31 CONFIG MODULE CLOCK
32 SPARE
33 ARINC 429 OUT 3 A (CDU 2, high-speed)
34 SPARE
35 SIGNAL GROUND (GPS 2)
36 SPARE
37 SIGNAL GROUND
38 SIGNAL GROUND (MAGNETOMETER)
39 MAGNETOMETER RS-485 IN B
40 MAGNETOMETER GROUND
41 SIGNAL GROUND (GPS 1)
42 SIGNAL GROUND (CDU 1)
43 SIGNAL GROUND (AFCS)
44 SIGNAL GROUND (AIR DATA)
An asterisk (*) following a signal name denotes that the signal is an Active Low, requiring a ground to
activate.
Page 4-2
Revision L
Table 4-1. P771 Pin Assignments (Continued)
GRS 77/GMU 44 Installation Manual
190-00303-10
I/O
Out
--
In
Out
Out
Out
Out
In
Out
--
Out
--
--
--
--
--
In
--
--
--
--
--