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Omega Speaker Systems PCI-DAS1001 User Manual Page 15

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4.2.6 Isolated Grounds / Single-Ended Inputs
Single-ended inputs can be used to monitor isolated inputs, though the use of the differential mode will increase your
system’s noise immunity. The diagram below shows the recommended connections is this configuration.
4.2.7 Isolated Grounds / Differential Inputs
Optimum performance with isolated signal sources is assured with the use of the differential input setting. The diagram
below shows the recommend connections is this configuration.
12
System with a Lar
g
e Common Mode Volta
g
e,
Connected to a Differential Input
L
arge com
m
on
mode voltage
between signal
source & A/D board
GND
Isolation
Barrier
When the voltage difference
between signal source and
A/D board ground is large
enough so the A/D board’s
common mode range is
exceeded, isolated signal
conditioning must be added.
+
-
Input
Amp
To A /D
A/D Board
I/O
Connector
LL GND
CH High
CH Low
10 K
10K is a recommended value. You may short LL GND to CH Low
instead, but this will reduce your system’s noise imm unity.
Isolated Si
g
nal Source
Connected to a Sin
g
le-Ended Input
I/O
Connector
+
-
Input
Amp
To A/D
LL GND
CH IN
A/D Board
Isolated
signal
source
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