1) Position Input: The position input is a PCM-Master module (PCM-M) using voltage
divider concept to provide a D.C. input voltage, also known as setpoint, see Figure 4a).
A potentiometer of the PCM-M is a pot P1, shown in Figure 5).
2) Position Output: The position output module or PCM-Slave Modlue(PCM-S) consists of
a DC motor, a gear box, and an output potentiometer, as shown in Figure 4b). A
motor's shaft is connected to the output potentiometer that converts mechanical output
to electrical output (D.C. voltage), see Figure 4 b).