Measurement Computing CIO-DAS16/330 - Manual (Page 27)

Figure 6-2. Differential Input
Figure 6-2 shows the differential mode (multiplexer not shown).
A single-ended input has no common mode range because there is only one LOW wire, the level of which is assumed to
be the same, signal source and A/D board (Figure 6-3).
Figure 6-3. Single-Ended Input
The maximum difference which can be rejected is the CMR.
For example, the CIO-DAS16/330 has a common mode plus signal range of 11.5 volts, common mode not to exceed 10
volts.
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