Connector Pinout Information; Main Board Connector - P3251 - Garmin GTX 3x5 Series Installation Manual

5 CONNECTOR PINOUT INFORMATION

5.1 Main Board Connector - P3251

This section describes the main board connector, which is available on all unit configurations.
21 20 19
42 41 40
62 61
Pin
1 CONFIG CLOCK
2 USB D+
3 OAT INPUT
4 1PPS A
5 ARINC 429 TXA
6 ARINC 329 TXB
7 RS-232 #3 TxD
8 RS-232 #2 TxD
9 RS-232 #1 TxD
10 ALT A1
11 ALT B1
12 ALT C1
13 ALT D4
14 EXT STANDBY
15 DISC IO1
16 DISC IO2
17 ALTITUDE ALERT OUT
18 SUPPRESSION BUS
19 LTNG HI
20 GROUND (power ground)
21 AV PWR 1
22 CONFIG DATA
23 GROUND (config module)
24 USB D-
25 OAT POWER
26 1PPS B
190-01499-02
Rev. 1
18 17 16 15 14 13 12
39 38 37 36 35 34
60 59 58 57 56 55 54
11 10 9 8 7 6
33 32 31 30 29 28 27
53 52 51 50 49 48
Pin Name
GTX 3x5 TSO Installation Manual
5 4 3 2 1
26 25 24 23 22
47 46 45 44 43
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
Page 5-1
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I
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O
O
O
O
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I
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