190-02207-A2
GPS 175/GNX 375/GNC 355 Part 23 AML STC Maintenance Manual
Rev. 3
Page 5-25
5.4 GNX 375 Connector Pinout Information
5.4.1 J3751 62-Pin HD-DSub
Figure 5-13 J3751 Connector (Looking at Unit)
I/O
C4
B1
A1
I
A
C1
I/O
+
H
I
B2
A2
I
R
B
D4
C2
O
+
L
21
42
Ex
t Ident Input
A
ir/G
round Input
Ex
t S
tandby
Input
Li
ghti
ng B
us
Ex
t S
uppr
es
si
on B
us
Sw
itc
he
d
Po
w
er
O
ut
Al
titud
e G
ray
C
ode Input
Pow
er
Input 1
Pow
er
G
round
T
A
Ground
R
S-
232 #5
Audi
o Mute
O
AT
P
robe
R
S-
232 #4
62
B4
A4
I
B
A
Pr
es
sur
e S
ens
or
/
C
onfi
g Mod
ul
e
22
43
1
I
O
I
C
I
T
O
D
T
R
V
R
S-
232 #3
B
Audi
o C
anc
el
D
is
cr
ete I/O
2
Po
we
r Co
nt
ro
l
R
Ti
m
e
M
ar
k
A
AR
IN
C
429 R
X2
A
udi
o O
utput
AR
IN
C
429 R
X1
Reserved
