Measurement-computing PCM-DAS16D/12 Manuel d'utilisateur télécharger pdf (Page 19)

4.2WIRING CONFIGURATIONS

Combining all the grounding and input type possibilities provides us with the follow-

ing potential connection configurations. The combinations along with our recommen-

dations on usage are shown in the chart below.

RecommendedDifferential Inputs

Already Isolated

Grounds

AcceptableSingle-ended Inputs

Already Isolated

Grounds

Unacceptable without

adding Isolation

Differential Inputs

Common Mode

Voltage > +/-10V

Unacceptable without

adding Isolation

Single-Ended Inputs

Common Mode

Voltage > +/- 10V

RecommendedDifferential Inputs

Common Mode

Voltage < +/-10V

Not RecommendedSingle-Ended Inputs

Common Mode

Voltage < +/-10V

AcceptableDifferential InputsCommon Ground

RecommendedSingle-Ended InputsCommon Ground

OUR VIEW

INPUT

CONFIGURATION

GROUND

CATEGORY

The following sections depicts recommended input wiring schemes for each of the 8

possible input configuration/grounding combinations.

4.2.1 Common Ground / Single-Ended Inputs

Single-ended is the recommended configuration for common ground connections.

However, if some of your inputs are common ground and some are not, we recom-

mend you use the differential mode. There is no performance penalty (other than loss

of channels) for using a differential input to measure a common ground signal source.

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Measurement-computing PCM-DAS16D/12 Manuel d'utilisateur Page 19