Potentiometer (Ratiometric) Sensors; Connecting Rotary Encoder - Parker CM2904 Instruction Book

Ensure that voltage range of the used sensor is within allowed range of CM2904
Analog Inputs measurement range (refer to chapter 5.2.1).
Potentiometers and other ratiometric type sensors can be wired directly to Analog
9.3.4.

Potentiometer (Ratiometric) Sensors

Inputs (refer to chapter 5.2.1).
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 CM2904 sensor supply pin:
•
Connect the other end to a sensor gnd:
•
Connect the sensor signal to an analog input.
The following shows a typical potentiometer sensor connection:
•
Figure 13: Potentiometer (ratiometric) sensor installation connection

9.4. Connecting rotary encoder

Frequency inputs can be used for connecting incremental rotary encoder (pulse
wheel) into CM2904 by utilizing the quadrature feature of Frequency inputs.
These two signals are decoded to produce a count up pulse or a countdown pulse.
FI1 & FI2 inputs are read by CM2904 software and to decode the direction.
CM2904 Instruction Book
Either +8VOut or +5VOut –pin

X1/ Pin 11 for +8VOut or X2/pin 7 for +5VOut.

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Application Examples
Connecting rotary encoder
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