Proximity Sensor Wiring Diagram Check out the full blog post over at https://realpars.com/discrete-sensors-part-2/ Discrete DC Sensors, or discrete Direct Current sensors, operate in a circuit with a battery or other power source, commonly known as a power supply. A power supply is placed in an electrical circuit to provide power to the connected devices, like proximity switches, or a motor. DC power supplies are referred to by their voltage and capacity, indicated by how many amperes they can s