Measurement-computing PCM-DAS16D/12 User Manual Page 23

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4.2.7 Isolated Grounds / Differential Inputs
Optimum performance with isolated signal sources is assured with the use of the dif-
ferential input setting. The diagram below shows the recommend connections is this
configuration..
19
+
-
Input
Amp
To A /D
A/D Board
I/O
Connector
LL GND
CH High
CH Low
+
-
S
i
g
n
a
l
S
o
u
r
c
e
a
n
d
A
/
D
B
o
a
r
d
A
l
r
e
a
d
y
I
s
o
l
a
t
e
d
.
Already isolated signal source
and A/D board connected to
a differential input.
GND
These grounds are
electrically isolated.
10 K
10K is a recommended value. You may short LL GND to CH Low
instead, but this will reduce your system’s noise immunity.
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