Analog Input Connections; Single-Ended Channel Connections - Advantech USB-4716 User Manual

3.3

Analog Input Connections

USB-4716 supports 16 single-ended/8 differential (or combination) analog inputs.
Each individual input channel is software-selected.
3.3.1

Single-ended Channel Connections

The single-ended input configuration has only one signal wire for each channel, and
the measured voltage (Vm) is the voltage of the wire as referenced against the com-
mon ground.
A signal source without a local ground is also called a "floating source". It is fairly sim-
ple to connect a single-ended channel to a floating signal source. In this mode, USB-
4716 provides a reference ground for external floating signal sources.
Figure 3.2 shows a single-ended channel connection between a floating signal
source and an input channel on USB-4716.
USB-4716 User Manual
Figure 3.2 Single-Ended Input Channel Connection
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