Measurement-computing CIO-DAS08-PGH Manuale Utente Pagina 16

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3.2.6 Isolated Grounds / Single-Ended Inputs
Single-ended inputs can be used to monitor isolated inputs, though the use of the differential mode will increase you system’s
noise immunity. Figure 3-9 below shows the recommended connections is this configuration.
Figure 3-9 . Isolated Grounds - Single-Ended Inputs
3.2.7 Isolated Grounds / Differential Inputs
Optimum performance with isolated signal sources is assured with the use of the differential input setting. Figure 3-10 shows the
recommend connections is this configuration..
Figure 3-10. Isolated Grounds - Differential Inputs
12
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 si
g
nal source
and A/D board connected to
a differential input.
GND
These
g
rounds 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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