Measurement Computing PCM-DAS16x/16 - Manual (Page 20)

6.1.2 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/16 measures the voltage between
the input channel and LLGND. The single-ended input configuration requires only
one physical connection (wire) per channel and allows the PCM-DAS16x/16 to moni-
tor more channels than the (2-wire) differential configuration using the same connec-
tor and onboard multiplexor. However, since the PCM-DAS16x/16 is measuring the
input voltage relative to its own low level ground, single-ended inputs are more sus-
ceptible to both EMI (Electro Magnetic Interference) and any ground noise at the sig-
nal source. The following diagrams show the single-ended input configuration.
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