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| G N D |
| CH High |
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CH Low
10 K 
LL GND
+
Inp ut |
| To A /D |
A m p |
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-
These grounds are 
electrically isolated .
I/O | A /D Board |
C onn ector |
10K is a recom m e nded value . You m ay sho rt LL G N D to C H Low instead, b ut this w ill re duce yo ur system ’s noise im m u nity.
Already isolated signal source and A/D board connected to a differential input.
13
