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3.3.7 Isolated Grounds / Differential Inputs

Optimum performance with isolated signal sources is assured with the use of the differential input setting. Figure 3-10 below shows the

recommend connections is this configuration..

Figure 3-10. Isolated Grounds/Differential Inputs

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

nal source

and A/D board connected to

a differential input.

GND

These

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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