Clarification on page 45 of User Manual for SDC2130

6 years 4 months ago #29529216 by Frank Weber
Please refer to the attached page 45 of the latest User Manual. Figure 17 provides a clear depiction of how a 'switch' input should be wired to the SDC2130. DOTs in wiring drawings typically represent connections. Figure 17 doesn't have a DOT above the 33k resistor while Figure 18 does - it should be clear to everyone that Figure 17 should have one too. What's confusing to me, however, is that Figure 18 has a DOT on the vertical 'wire' (if it is a wire) to the right of the 'AIN' terminal while the upper and lower leads of that wire shown connected to the "+5" and "ground" respectively have no DOTs. I do believe that this vertical line is not a wire at all (even though it has a DOT) but was meant to convey a reference to the "Internal Resistors and Converters" note.

We plan to connect a US Digital model MA3 "Miniature Absolute Magnetic Shaft Encoder" (see attachment) as an analog input.

Would you mind confirming that the wiring shown in the Attachment labeled "Sketch-A" is correct.

Thank you again,

Frank Weber

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6 years 4 months ago #29529217 by Griffin Baker
Replied by Griffin Baker on topic Clarification on page 45 of User Manual for SDC2130
It is as stated in the manual. Figure 18 is not the same as the figure 17 because of the input use( digital input switch vs. analog input use).

If you use the MA3 sensor, you must wire it as a pot and configure the analog input as relative because the sensor voltage will be related to its power supply voltage.

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