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4 SYSTEM INTERCONNECTS
4.1 Pin Function List
4.1.1 P2301
21
Pin
Pin Name
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*
13
EXTERNAL STANDBY SELECT*
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
22
RS-232 IN 1
23
RS-232 OUT 1
24
RS-232 IN 2
25
RS-232 OUT 2
26
NOT USED
27
NOT USED
28
ARINC 429 OUT 2 B
29
NOT USED
30
ARINC 429 OUT 2 A
31
MUTUAL SUPPRESSION I/O
32
NOT USED
33
NOT USED
34
ARINC 429 OUT 1 B
35
NOT USED
*Denotes Active Low (Ground to activate).
GTX 23 Installation Manual
190-00906-01
20
19
18
17
16
15
14
13
12
42
41
40
39
38
37
36
35
34
61
60
57
56
55
62
59
58
Figure 4-1 J2301 Connector
11
10
9
8
7
6
5
4
33
32
31
30
29
28
27
26
25
51
50
49
48
47
46
54
53
52
3
2
1
24
23
22
44
Page 4-1
Revision A
I/O
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In
In
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In
In
Out
In
Out
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Out
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Out
I/O
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Out
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