User`s manual

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 in this
configuration.
4.2.7 Isolated Grounds / Differential Inputs
Optimum performance with isolated signal sources is ensured with the use of the differential input setting.
The diagram below shows the recommend connections in this configuration.
15
Isolated Signal Source
Connected to a Single-Ended Input
I/O
Connector
+
-
Input
Amp
To A /D
LL GND
CH IN
A/D Board
Isolated
signal
source
+
-
Input
Amp
To A/D
A/D Board
I/O
Connector
LL GND
CH High
CH Low
Signal Source
and A/D Board
Already Isolated.
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.