Measurement Computing PCM-DAS16D/12 - Manual (Page 12)

4.1.1 Single-Ended Inputs
A single-ended input measures the voltage between the input signal and
ground. In this case, in single-ended mode the PCM-DAS16x/12 measures the
voltage between the input channel and LLGND. The single-ended input con-
figuration requires only one physical connection (wire) per channel and
allows the PCM-DAS16x/12 to monitor more channels than the (2-wire) dif-
ferential configuration using the same connector and onboard multiplexor.
However, since the PCM-DAS16x/12 is measuring the input voltage relative
to its own low level ground, single-ended inputs are more susceptible to both
EMI (Electro Magnetic Interference) and any ground noise at the signal
source. The following diagrams show the single-ended input configuration.
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