Measurement-computing CIO-DAS16 Manual do Utilizador descarregar pdf (Página 14)

Differential Inputs

Differential inputs measure the voltage between two distinct input signals. Within a certain range (referred to as the

common mode range), the measurement is almost independent of signal source to CIO-DAS16/F ground variations. A

differential input is also much more immune to EMI than a single-ended one. Most EMI noise induced in one lead is also

induced in the other, the input only measures the difference between the two leads, and the EMI common to both is

ignored. This effect is a major reason there is twisted pair wire as the twisting assures that both wires are subject to

virtually identical external influence. Figure 3-2 below shows a typical differential input configuration.

Figure 3-2. Differential Input Configuration

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Measurement-computing CIO-DAS16 Manual do Utilizador Página 14