190-00734-11
GTX 33X and GTX 3X5 ADS-B Maintenance Manual
Rev. 6
Page 5-15
5.4 GTX 3X5 Connector Pinout Information
5.4.1 GTX 3X5 (J3251)
Figure 5-8 Rear View, Connector J3251
Table 5-6 J3251 Pinout
Pin
GTX 3X5 Pin Name
I/O
1
ALT ENCODER/CONFIG MODULE CLOCK
In/Out
2
USB DATA HI
In/Out
3
TEMP PROBE IN
In
4
TIME MARK A
Out
5
ARINC 429 OUT A
Out
6
ARINC 426 OUT B
Out
7
RS-232 OUT 3
Out
8
RS-232 OUT 2
Out
9
RS-232 OUT 1
Out
10
ALITTUDE A1
In
11
ALTITUDE B1
In
12
ALTITUDE C1
In
13
ALTITUDE D4
In
14
EXTERNAL STANDBY SELECT
In
15
CONFIGURABLE DISCRETE 1
In/Out
16
CONFIGURABLE DISCRETE 2
In/Out
17
XPDR FAIL 1
Out
18
EXTERNAL SUPPRESSION
In/Out
19
LIGHTING BUS HI
In
20
AIRCRAFT GROUND
In
21
AIRCRAFT POWER 1
In
22
ALT ENCODER/CONFIG MODULE DATA
In/Out
23
ALT ENCODER/CONFIG MODULE GND
In
24
USB DATA LO
In/Out
59
58
57
56
55
54
53
52
51
43
44
50
49
48
47
46
45
62
61
60
25
24
23
22
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
1
2
3
4
5
6
7
8
9
10
11
13
14
15
16
17
12
19
20
21
18
