Analog Input Connections - Advantech MIC-3716 Manual

3.3 Analog Input Connections

The MIC-3716 supports both 16-channel single-ended or 8 differential
analog inputs. Each individual input channel is software-selectable.
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 common ground.
A signal source without a local ground is also called a "floating
source". It is fairly simple to connect a single-ended channel to a
floating signal source. In this mode, the MIC-3716 provides a
reference ground for external floating signal sources. Fig. 3-2 shows a
single-ended channel connection between a floating signal source and
an input channel on the MIC-3716.
36