How do you connect a sensor to a relay?
If the sensor sinks current (NPN): The relay should be connected between a + power supply (Vcc) and the output (Vout). If the sensor sources current (PNP): The relay should be connected between the sensor output (Vout) and the ground. Note the relay operating voltage and current must be chosen to work with the sensor.
How do you wire a PNP proximity sensor?
The PNP sensor: To interface a PNP sensor with a Yocto-PWM-Rx, you need: To connect ground (-) 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 together. To connect the black wire on the channel of your choice.
How do you wire a PNP input to an NPN sensor?
Connect your npn sensor output to one side of your relay coil and then the other side of the relay coil must connect to positive line of your supply source (+24v). use zero volt line (negative line) and connect it to one side of your relay aux.
How do sensors connect to PLC?
Because NPN sensors are “sinking”, they require a “sourcing” type PLC input card. A PNP sensor is referred to as a “sourcing” switch. This means that the “load”, which is the PLC input, is wired as shown in the diagram below. Notice that the blue “common” wire is connected to the PLC module’s common terminal.
What is PNP and NPN sensor?
PNP sensors produce a positive output to your industrial controls input, while NPN sensors produce a negative signal during an “on” state. NPN, or “sinking” output sensors, work in the opposite way, sinking ground voltage to an input when it’s on.
What are the 3 wires of a sensor?
When a target, the object that a sensor is detecting, comes within sensing range of the sensor, the sensor output turns on and current flows. A 3-wire sensor typically is color coded with one brown wire, one blue wire and one black wire.
How do PNP proximity sensors work?
As they are normally referred, PNP and NPN sensors are both supplied with positive and negative power leads, then produce a signal to indicate an “on” state. PNP sensors produce a positive output to your industrial controls input, while NPN sensors produce a negative signal during an “on” state.
How do PNP sensors work?
How do I know if my sensor is PNP or NPN?
An NPN sensor will swing between ‘open’ and ground, which would likely show 0 volts nearly the entire time, regardless of the energization state. A PNP sensor, in contrast, will toggle between 0 and 24 volts.
