Omega Speaker Systems PCI-DAS1001 - Manual (Page 15)

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.
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S ystem w ith a La rge C om m on M ode Voltag e,
C onne cte d to a D ifferential Inp ut
L arge com
m on
m
od e v o ltag e
be tw ee
n signa
l
so
u rc e &
A /D b
o a rd
G N D
Is olatio n
B arrie r
W h en the voltage diffe ren ce
be tw ee n sig nal source a n d
A /D b oa rd g ro und is la rge
en o ugh so the A /D b oa rd ’s
co m m o n m o d e ran ge is
ex ceed e d, iso la te d s ig nal
co ndition in g m u st be ad d ed.
+
-
In p u t
A m p
To A /D
A /D B o a rd I/O
C o n n e c to r
LL G N D
C H H igh
C H L ow
1 0 K
1 0 K is a r e c o m m e n d e d v a lu e . Yo u m a y s h o rt L L G N D to C H L o w
in s te a d , b u t th is w ill re d u c e y o u r s y s te m ’s n o is e im m u n ity.
Iso lated S ignal S ource
C onne cte d to a S ingle-E nded Input
I/O
C o nn ector
+
-
Inp ut
A m p
To A /D
LL GN D
C H IN
A /D B o a rd
Iso lat
ed
sig na
l
sour
ce