Advantech MIC-1810 User Manual page 29

Intel core i3-6100u/celeron 3955u daq embedded automation computer

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If a floating signal source is connected to the differential input channel, the signal

source might exceed the common-mode signal range of the PGIA, and the PGIA will

be saturated with erroneous voltage-readings. You must therefore reference the sig-

nal source against the AGND.

Figure 3.8 shows a differential channel connection between a floating signal source

and an input channel on the MIC-1810. In this figure, each side of the floating signal

source is connected through a resistor to the AGND. This connection can reject the

common-mode voltage between the signal source and the MIC-1810 ground.

Figure 3.8 Differential input channel connection - floating signal source

MIC-1810 User Manual

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