Vansco VMM3120, User Manual, Page: 77 / 92

User Guide 67
Application Examples
9.7.7. Potentiometer (Ratiometric)
Potentiometers and other ratiometric type sensors can be wired directly to analog
inputs.
Potentiometers are resistive devices that use a wiper arm to create a voltage
divider. Changes to resistive measurements happen as the wiper arm moves along
a resistive element.
When connecting potentiometer sensors, it is important to do the following:

Connect one end of the sensor to the SENSOR_SUPPLY pin, and the other end to
a GND pin on the VMM3120.

Connect the sensor signal to an analog input.
The following shows a typical potentiometer sensor connection:
Internal to product
Sensor Voltage
Sensor Ground
Potentiometer
Analog Input
Figure 37: Potentiometer (ratiometric) sensor connection