889-2106-03
Model U-1400 Operations Manual Rev Apr 2020 Page
13
of 39
COMM PORT (DB-9 Communication Interface Connector)
Pin
Function
1
No Connection
2
RS-232 TX
3
RS-232 RX
4
No Connection
5
RS-232 Common
6
No Connection
7
No Connection
8
No Connection
9
No Connection
3.7
TABLE: PIN ASSIGNMENTS / WIRE COLORS
(Model 805-3-S and Model 805-8-S Wiring Harnesses)
Pin
Function
Wire Color
Pin
Function
Wire Color
A
Channel 1 Primary Vital Output -
Brown / Blue
f
Channel 3 Primary Vital
Blue / Orange
B
Channel 1 Vital Input -
Brown / Gray
g
Channel 4 Primary Vital Output -
Yellow / Blue
C
Channel 2 Vital Input +
Gray / Red
h
Channel 4 Primary Vital
Blue / Yellow
D
Channel 3 Loop Input
Orange
i
Channel 2 Check Loop Input
White
E
Channel 3 Loop Input
Orange
j
Channel 3 Check Loop Input
White
F
Channel 4 Loop Input
Yellow
k
Channel 2 Auxiliary Vital Output -
Red / Violet
G
DC Common (Non-isolated)
Black
m
Channel 2 Primary Vital Output -
Red / Blue
H
12 VDC + (Non-isolated)
Red / White
n
Channel 1 Auxiliary Vital
Violet / Brown
J
Channel 4 Auxiliary Vital Output -
Yellow / Violet
p
Channel 1 Auxiliary Vital Output -
Brown / Violet
K
Channel 3 Primary Vital Output -
Orange / Blue
q
Channel 1 Vital Input +
Gray / Brown
L
Channel 3 Auxiliary Vital
Violet / Orange
r
Channel 4 Vital Input +
Gray / Yellow
M
Channel 3 Auxiliary Vital Output -
Orange / Violet
s
Channel 4 Vital Input -
Yellow / Gray
N
Channel 1 Check Loop Input
White
t
Reserved
N/A
P
Channel 2 Check Loop Input
Red
u
Channel 1 Check Loop Input
Brown
R
Channel 3 Check Loop Input
Orange
v
Channel 4 Check Loop Input
White
S
Channel 1 Loop Input
Brown
w
Reserved
N/A
T
Channel 1 Loop Input
Brown
x
Reserved
N/A
U
Channel 2 Loop Input
Red
y
Channel 3 Vital Input +
Gray / Orange
V
Channel 2 Loop Input
Red
z
Channel 2 Auxiliary Vital
Violet / Red
W
Channel 2 Vital Input -
Red / Gray
AA
No Connection
N/A
X
Synch In
Blue
BB
Channel 2 Primary Vital
Blue / Red
Y
Channel 3 Vital Input -
Orange / Gray
CC
No Connection
N/A
Z
Reset
Gray
DD
No Connection
N/A
a
Reserved
N/A
EE
Chassis Ground
Green
b
Channel 4 Loop Input
Yellow
FF
Channel 1 Primary Vital
Blue / Brown
c
Synch Out
Violet
GG
No Connection
N/A
d
Channel 4 Check Loop Input
Yellow
HH
No Connection
N/A
e
Channel 4 Auxiliary Vital
Violet / Yellow
NOTES: The pairs of wires connected to Pins D & E, Pins F & b, Pins N & u, Pins P & i, Pins R & j, Pins S & T, Pins U & V, and
Pins d & v are twisted together.
There is an additional green wire in the harness wire bundle that is used to ground the connector shell.
