Omega OMB-DAQBOARD-500 manual Differential DIFF, Differential for Grounded Signal Sources

Differential (DIFF)

In installations where each Ground Referenced Source signal has a local ground [signals located remote from one another] the Differential configuration must be used. Since the Differential configuration only responds to the difference in a signal between its high and low voltages, any Common Mode Voltage will be cancelled out. In addition, Differential configuration provides the best performance of the two configurations in an electrically noisy environment.

The Differential configuration should be used when any of the following exist:

Each source has a local ground

Signal sources are remote from one another

Common Mode Voltage exists

Common Mode Noise exists

Signal sources are low-level (less than 1 V)

Signal source leads are longer that 12 feet

Differential for Grounded Signal Sources

The following figure is an example of a Differential Configuration for grounded signal sources.

Differential Configuration for Grounded Sources

DaqBoard/500 Series User’s Manual 887293 Connections & Pinouts 2-9