Sensor connections 5, Connectors – Sensoray 417 User Manual
Page 30
Chapter
5
Sensor Connections
5
Connectors
Analog input signals connect to the 417 board by means of header connectors P1 and P2. Header
P1 provides connections to channels 0-15 and P2 to channels 16-31 as shown in the table below:
Since all 32 channels have true differential inputs, each channel must have both a positive and neg-
ative connection, shown as “+” and “-”, respectively, under Input Polarity in the above table. Head-
ers P1 and P2 also make available ISAbus ground (sometimes referred to as the “shield”) at pins
33, 34, and 38-40, +12V at pin 36, and a thermocouple reference sensor input at pin 37.
Live Connections—
Model 417 circuitry is designed to permit modifications to sensor connec-
tions without disturbing system operation. Sensors may be electrically connected and disconnected
from the coprocessor without physically removing the 417 board or electrically removing power
from the ISAbus.
Table 12: Connector pinouts for headers P1 and P2
Connector P1
Connector P2
C
h
a
n
n
el
In
p
u
t
P
o
la
ri
ty
P
in
N
u
m
b
er
T
B
M
a
r
k
in
g
C
h
a
n
n
el
In
p
u
t
P
o
la
ri
ty
P
in
N
u
m
b
er
T
B
M
a
r
k
in
g
C
h
a
n
n
el
In
p
u
t
P
o
la
ri
ty
P
in
N
u
m
b
er
T
B
M
a
r
k
in
g
C
h
a
n
n
el
In
p
u
t
P
o
la
ri
ty
P
in
N
u
m
b
er
T
B
M
a
r
k
in
g
0
+
2
V+0
8
+
1
I+0
16
+
2
V+0
24
+
1
I+0
-
4
V-0
-
3
I-0
-
4
V-0
-
3
I-0
1
+
6
V+1
9
+
5
I+1
17
+
6
V+1
25
+
5
I+1
-
8
V-1
-
7
I-1
-
8
V-1
-
7
I-1
2
+
10
V+2
10
+
9
I+2
18
+
10
V+2
26
+
9
I+2
-
12
V-2
-
11
I-2
-
12
V-2
-
11
I-2
3
+
14
V+3
11
+
13
I+3
19
+
14
V+3
27
+
13
I+3
-
16
V-3
-
15
I-3
-
16
V-3
-
15
I-3
4
+
18
V+4
12
+
17
I+4
20
+
18
V+4
28
+
17
I+4
-
20
V-4
-
19
I-4
-
20
V-4
-
19
I-4
5
+
22
V+5
13
+
21
I+5
21
+
22
V+5
29
+
21
I+5
-
24
V-5
-
23
I-5
-
24
V-5
-
23
I-5
6
+
26
V+6
14
+
25
I+6
22
+
26
V+6
30
+
25
I+6
-
28
V-6
-
27
I-6
-
28
V-6
-
27
I-6
7
+
30
V+7
15
+
29
I+7
23
+
30
V+7
31
+
29
I+7
-
32
V-7
-
31
I-7
-
32
V-7
-
31
I-7