190-01115-01
G3X/G3X Touch Installation Manual - LRU Pinouts
Rev. AC
Page 25-77
25.17 GTX 23 (Mode S Transponder)
25.17.1 Connector Description
The GTX 23 has one 62-pin connector (J2301) as shown below. All electrical connections are made
through J2301 except for the antenna and shield ground.
25.17.2 J2301 Connector
Figure 25-32. J2301 on GTX 23, as viewed looking at connector on unit
Pin
Pin Name
I/O
1
NOT USED
--
2
NOT USED
--
3
NOT USED
--
4
NOT USED
--
5
NOT USED
--
6
NOT USED
--
7
NOT USED
--
8
NOT USED
--
9
NOT USED
--
10
NOT USED
--
11
NOT USED
--
12
EXTERNAL IDENT SELECT*
In
13
EXTERNAL STANDBY SELECT*
In
14
NOT USED
--
15
NOT USED
--
16
NOT USED
--
17
NOT USED
--
18
NOT USED
--
19
NOT USED
--
20
NOT USED
--
21
AIRCRAFT POWER 1
In
22
RS-232 IN 1
In
23
RS-232 OUT 1
Out
24
RS-232 IN 2
In
25
RS-232 OUT 2
Out
26
NOT USED
--
27
NOT USED
--
28
ARINC 429 OUT 2 B
Out
29
NOT USED
--
*Denotes active low (ground to activate)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
44
46
47
48
49
50
51
52
53
54
55
56
16
17
18
19
20
21
37
38
39
40
41
42
57
58
59
60
61
62
