
However the reverse is not true. The diagram below shows a recommended connec-
tion diagram for a common ground / single-ended input system.
4.2.2 Common Ground / Differential Inputs
The use of differential inputs to monitor a signal source with a common ground is a
acceptable configuration though it requires more wiring and offers fewer channels
than selecting a single-ended configuration. The diagram below shows the recom-
mended connections in this configuration.
4.2.3 Common Mode Voltage < ±10V / Single Ended Inputs
This is not a recommended configuration. In fact, the phrase common mode has no
meaning in a single-ended system and this case would be better described as a system
with offset grounds. Anyway, you are welcome to try this configuration, no system
Amp
LL GND
CH IN
+
-
S
i
g
n
a
l
S
o
u
r
c
e
w
i
t
h
C
o
m
m
o
n
G
n
d
Optional wire
since signal source
and A/D board share
common ground
Signal source and A/D board
sharing common ground connected
to single-ended input.
Amp
LL GND
CH High
CH Low
+
-
S
i
g
n
a
l
S
o
u
r
c
e
wi
t
h
Co
m
m
o
n
G
n
d
Optional wire
since signal source
and A/D board share
common ground
Required connection
of LL GND to CH Low
Signal source and A/D board
sharing common ground connected
to differential input.
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