190-02081-03
GFC 600H HFCS Part 27 STC Maintenance Manual
Rev. 3
Page 5-19
Table 5-12 J751 Connector Pinout
* Indicates Active-Low
** Both pin numbers are functionally equivalent and are internally connected within the GSU 75.
Pin
Function
I/O
Pin
Function
I/O
1
ARINC 429 OUT (ADC) 1A
OUT
40
PPS IN 1 B
IN
2
ARINC 429 OUT (ADC) 1B
OUT
41
PPS IN 2 A
IN
3
ARINC 429 OUT (ADC) 2A
OUT
42
ARINC 429 IN (ADC) 1A
IN
4
OAT LO
IN
43
ARINC 429 IN (ADC) 1B
IN
5
OAT HI
IN
44
ARINC 429 IN (ADC) 2A
IN
6
OAT PWR
OUT
45
ARINC 429 IN (AHRS) 1A
IN
7
ARINC 429 OUT (ADAHRS) 1B
OUT
46
ARINC 429 IN (AHRS) 1B
IN
8, 28** ARINC 429 OUT (ADAHRS) 3A
OUT
47
ARINC 429 IN (AHRS) 3A
IN
9, 29** ARINC 429 OUT (ADAHRS) 3B
OUT
48
SIGNAL GND
--
10
RS-485 IN A
IN
49
ARINC 429 OUT (ADAHRS) 2A
OUT
11
RS-485 IN B
IN
50
ARINC 429 OUT (ADAHRS) 2B
OUT
12
RS-232 OUT (AHRS) 3
OUT
51
RS-232 OUT (AHRS) 1
OUT
13
MAGNETOMETER PWR OUT
OUT
52
RS-232 IN (AHRS) 1
IN
14
AIRCRAFT PWR 1
IN
53
CONFIG MODULE PWR
OUT
15
SIGNAL GND
--
54
CONFIG MODULE DATA
I/O
16
AIRCRAFT PWR 2
IN
55
CONFIG MODULE CLOCK
OUT
17
RS-232 OUT (ADC) 2
OUT
56
DISCRETE IN 1*
IN
18
RS-232 IN (ADC) 2
IN
57
SYS ID 2*
IN
19
CAN BUS LO
I/O
58
RESERVED
---
20
CAB BUS HI
I/O
59
RESERVED
---
21
ARINC 429 OUT (ADC) 3A
OUT
60
PPS IN 1 A
IN
22
ARINC 429 OUT (ADC) 3B
OUT
61
PPS IN 2 B
IN
23
ARINC 429 OUT (ADC) 2B
OUT
62
ARINC 429 IN (ADC) 3A
IN
24
GND
--
63
ARINC 429 IN (ADC) 3B
IN
25
PPS SELECT
IN
64
ARINC 429 IN (ADC) 2B
IN
26
SIGNAL GND
--
65
ARINC 429 IN (AHRS) 2A
IN
27
ARINC 429 OUT (ADAHRS) 1A
OUT
66
ARINC 429 IN (AHRS) 2B
IN
28
ARINC 429 OUT (ADAHRS) 3A
OUT
67
ARINC 429 IN (AHRS) 3B
IN
29
ARINC 429 OUT (ADAHRS) 3B
OUT
68
RS-232 GND (ADC) 1
--
30
SIGNAL GND
--
69
RS-232 OUT (ADC) 1
OUT
31
RS-232 GND (AHRS) 3
--
70
RS-232 IN (ADC) 1
IN
32
RS-232 GND (AHRS) 1
--
71
RS-232 OUT (AHRS) 2
OUT
33
MAGNETOMETER GND
--
72
RS-232 IN (AHRS) 2
IN
34
AIRCARFT GND 1
--
73
RS-232 GND (AHRS) 2
--
35
RESERVED
--
74
CONFIG MODULE GND
--
36
AIRCARFT GND 2
--
75
SYS ID 1*
IN
37
RS-232 GND (ADC) 2
--
76
DISCRETE IN 3*
IN
38
CAN TERM
I/O
77
DISCRETE IN 4
IN
39
RESERVED
---
78
DISCRETE IN 2*
IN
