190-02207-A2
GPS 175/GNX 375/GNC 355 Part 23 AML STC Maintenance Manual
Rev. 3
Page 5-27
5.4.2 J3752 44-Pin HD-DSub
Figure 5-14 J3752 Connector (Looking at Unit)
Table 5-6 J3752 Connector Pinout
Pin
Pin Name
I/O
Pin
Pin Name
I/O
1
ARINC 429 OUT 1 A
OUT
23
VEDOWN OUT
OUT
2
ARINC 429 OUT 1 B
OUT
24
FROM FLAG
--
3
ETHERNET OUT(P)
OUT
25
GND
--
4
ETHERNET IN(P)
IN
26
OBS STATOR E (GND)
--
5
RS-232 #1(T) / RS-422 A
OUT
27
OBS STATOR D
--
6
RS-232 #2(T)
OUT
28
LOI ANNUNCIATE
--
7
LLEFT OUT
OUT
29
DEMO MODE
IN
8
VEUP OUT
OUT
30
GND
--
9
TO FLAG
--
31
RESERVED
--
10
LOC COMPOSITE
OUT
32
RESERVED
--
11
OBS ROTOR H (GND)
OUT
33
DISCRETE OUT 4
OUT
12
OBS ROTOR C
OUT
34
GND
--
13
APPROACH ANNUNCIATE
OUT
35
GND
--
14
DISCRETE IN 2
IN
36
LATERAL GND
--
15
REMOTE GO AROUND
--
37
LATERAL FLAG OUT
OUT
16
RESERVED
--
38
VERTICAL FLAG OUT
OUT
17
RESERVED
--
39
VERTICAL GND
--
18
ETHERNET OUT(N)
OUT
40
OBS STATOR G (GND)
--
19
ETHERNET IN(N)
IN
41
OBS STATOR F
--
20
RS-232 #1(R) / RS-422(B)
IN
42
GPS SELECT
--
21
RS-232 #2(R)
IN
43
TEST MODE
IN
22
LRIGHT OUT
OUT
44
POWER INPUT
IN
O
+
T/A
R
T
C
I
O
I
T
R
R/B
L
R
D
I
15
30
VD
I V
al
id
Fl
ag
VD
I
AP
PR
R
S-
232
#
1/
R
S422
TX
R
em
ot
e
G
o
Ar
oun
d
D
iscr
et
e
Input
2
A
Ground
AR
IN
C
4
29
TX
TO
/F
R
O
M
Fl
ag
H
SD
B
TX
+
I
O
F
+
44
16
31
1
U
F
T
D
B
R
HS
DB
RX
D
em
o
M
ode
LO
C
C
om
posi
te
Pow
er
In
put
OB
S
T
O
Reserved
LO
I
CD
I
R
S-
232
#2
Te
st
M
od
e
G
PS
Se
le
ct
C
D
I V
al
id
Fl
ag
D
iscr
et
e
O
ut
4
O