Pnp And Npn Proximity Sensor Wiring

A few proximity sensors equipped with npn or pnp outputs.

Pnp and npn proximity sensor wiring. Pnp switched positive npn switched negative switched refers to which side of the controlled load relay small indicator plc input is being switched electrically. Of the external power supply and the sensor blue wire on the module ground. To connect the of the external power supply and the sensor brown wire on the. 2 wire dc pnp 2 wire dc npn 3 wire dc pnp and 3 wire dc npn cases have been covered in this discussion.

They are typically designed as three wire devices with leads or connections for. If you learned to use sensors before gaining an understanding of transistors themselves it would be easy to think that a pnp transistor is controlled with positive voltage. Switched or sensor signal. That means that the sensor can be wired as positive sourcing or negative sinking switch.

The switching logic pnp or npn are not related to the supply voltage of the sensor or the operating voltage of the input. Pnp versus npn switching. Connecting a 4 wire dc sensor is the same as a 3 wire sensor but each output wire is connected to a different input on the input card. The ck1 00 2h is an 18mm diameter npn pnp n o n c.

And they can be further divided into npn type and pnp type. Either the load is connected to negative and the positive is switched pnp continue reading an easy way to remember pnp and npn sensor. Solid state devices are active as opposed to passive and therefore usually require some small amount of operating power. These outputs have three wires with standard although counter intuitive colors.

We will be wiring a capacitive proximity switch into the input of our click plc. This sensor is the ck1 00 2h capacitive proximity sensor. The box in the diagram represents the load. Generally people in the united states and japan usually use npn proximity sensor while in the europe use the pnp proximity sensor.

The 24 vdc and 0 vdc wires power the device. 3 wire pnp npn cylindrical proximity sensors and switches 6 products cylindrical proximity sensors and switches use infrared acoustic capacitative or inductive means to detect objects and will open or close the electrical circuit if the object is within a certain distance. Pnp or npn style defines how. Here s a simple way remember how to wire up a 3 wire dc pnp or npn sensor.

Referring to the npn wiring diagram above note that the sensor supply voltage and the high side of the load are connected to the same point and are therefore at the same voltage. Here is a wiring diagram of a pnp sensor. Power supply usually 12 to 24v. Selectable output with a 12mm sensing distance.