Npn Pnp Proximity Switch Wiring

A few proximity sensors equipped with npn or pnp outputs.

Npn pnp proximity switch wiring.

We will be wiring a capacitive proximity switch into the input of our click plc. The difference is in the type of transistor used in the sensor. To connect the of the external power supply and the sensor brown wire on the. Npn and pnp are technical terms for the type of transistor used to switch the output.

Npn negative positive negative switching. Selectable output with a 12mm sensing distance. 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. Several diagrams will show a resistor attached to the blue wire and a lo.

I recently received a question on pnp and npn sensors. They wanted an explanation of what a sink is and how to wire one. Sink source 2 wire or npn and pnp 3 wire models metal housing. The pnp and npn sensors are 3 wire dc devices.

That means that the sensor can be wired as positive sourcing or negative sinking switch. Am1 series sensors extended sensing distance 12mm features this proximity sensor has sink source selectable wiring models. Power supply usually 12 to 24v. Npn sensors are called diving sensors because they sink at the exit.

And they can be further divided into npn type and pnp type. These outputs have three wires with standard although counter intuitive colors. Watch the video below to see the wiring of sinking and sourcing to the click plc with the 2 wire proximity switch. Generally people in the united states and japan usually use npn proximity sensor while in the europe use the pnp proximity sensor.

And in dc circuit the proximity sensors used include 2 wire proximity sensor 3 wire proximity sensor and 4 wire proximity sensor. Sometimes referred to as sinking the load. 2 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. People have told me that when the npn sensor blows it has a tendency to blow in an open state.

Either the load is connected to negative and the positive is switched pnp continue reading an easy way to remember pnp and npn sensor. 2 wire dc pnp 2 wire dc npn 3 wire dc pnp and 3 wire dc npn cases have been covered in this discussion. Pnp switched positive npn switched negative switched refers to which side of the controlled load relay small indicator plc input is being switched electrically. Confusion over the normally open and normally closed function of the sensor is also a common question.

Npn and pnp refer to the transistor in the output device. The ck1 00 2h is an 18mm diameter npn pnp n o n c.