Now, there is probably no YouTuber who explains the wiring of this input and output like I did today. So, what are you looking for and watching this video today?

Lucky you! Luckily, just leave after watching this video. Then what is it?

This is a real betrayal. Hello. I sympathize with my father. In today's video, there are a lot of people asking me to explain the PLC 2-wire system in the comments of my video.

So, to answer their questions, I will show you today how I wired up the input and output for the 2-wire type.

I'll show you how to input a switch and a 2-wire sensor.

The one I'm holding is a 2-wire NPN, but you can also use this NPN like a PNP.

The 2-wire type, of course, does not work well with the 3-wire type, but the 2-wire type can also be used as a PNP.

Those of you who found my video today are very lucky, so it will be a great help to those who are just starting out.

No one will teach you that, this is a skill once you go out into the field. You can probably learn if you go to a center supported by the government.

Other than that, there is no one who can teach me much, because!? It's technology!!

There are not many people who can teach this technology so easily. I don't think of this as technology. It's basic, so watch my video and take a look.

Now, let me show you while practicing. Please click subscribe and like before watching the video. Let’s start now. Hubie~ Go! I will show you through hands-on practice.

If you look here, I have prepared a two-wire sensor. And the method of inserting the switch sensor and the switch is the same, but the sensor distinguishes between NPN and PNP, and the switch distinguishes between NPN and PNP.

And we prepared a lamp so that output comes out when input is input. First, I will explain the circuit. Here is the PLC. If you look at it, there are a total of 32 input points from P0 to 1F, and there are also 32 output points.

We cannot arbitrarily change the addresses of input and output. Since it is designated, we have to use it as is. Let's simply start with NPN first.

NPN outputs minus volts, right? Then, when looking at the PLC input here, P00 and P01 go straight out like this, and then there is COM.

Here too, COM is from P0 to F, and COM1 is from P10 to 1F.

It doesn't matter because you can see it in person. And DC power comes out at both ends. It says 24V, then minus 24V, and ground.

There is a lamp inside the PLC. If you look at the lamps, there are lamps and lamps. They are all connected internally.

All common lines are connected and are internally connected to COM. Then, since NPN is a negative output, negative volts are input here.

So what happens here? If it's going to be a closed circuit, a positive voltage has to go here. Then, connect the positive voltage to COM and use the negative voltage as P00.

If you are using a 2-wire sensor, here is the sensor.

It's two strands. It's two strands, and it's brown and blue. Then, since the minus signal comes in, there is also a plus and minus signal in the sensor.

Then minus... minus the signal turns blue. When you enter, the sensor here is also a switch.

There is a switch like this. So when an object touches the switch, the switch closes and this negative voltage enters and turns brown.

It comes out brown and goes to P00. In that case, it becomes a single circuit, and whenever an object is detected, the lamp lights up and it recognizes that a signal has been entered.

I'll give it a try first. COM first!
It's best to try it once, right?

I said COM is connected to Plus. If you look here, there is a plus 24 goal. Now, 24 is COM and sensor...

I extended the line because it was short. The black line is minus and the red line is plus. Now, minus!
The negative line is minus 24 volts, right?

The blue wire is black here and is connected to ground. Minus 24 volts enter and pass through the sensor.
It comes out as this brown line.

Right? Then it goes to P0. So now the circuit is like this. The negative voltage passes through the sensor to number P00.

Then, when an object is detected, number P00 should light up, right? Yes? In a way, it's simple like this.

It is the same as the fluorescent light circuit. It's just confusing because I'm not used to it, but it's easy.

Would you mind if you changed your mind? If you follow this circuit, when you come in, right? Whenever the sensor receives input, P00 lights up.

Now, let's take a look at the lamp on the output side as well. Because I need to confirm, in the case of lamp output, if you look here, there is a COM on each of the four terminals.

24V can be used, and 220 can be used. There are numbers P20, P21, etc., and then there is COM.

Next, I will explain that R and N are the hot lines that you all know well, and this is the common line.

In the case of the output section, here there is a relay inside, so you can think of this switch as the opposite of the input.

This is inside the PLC. This is what the inside looks like. All switches are connected. This time it is connected via COM.

Then this time, there is a lamp on the other side like this. Then, the output of the hot wire must go through the switch to prevent failure or malfunction.

Our fluorescent lights are like that too. Then, the R phase is set up so that the hot wire goes through COM, and the one commonality of the N phase is one went towards the ramp.

And when the hot wire comes out from the internal output of P20, what comes out is like this, and it becomes another closed loop.

Now, let me see if it's right. Where's the lamp? N prize! I will turn off the PLC power.

This is the RN phase. I connected it to the power source. And the hot wire is connected to COM. The COM terminal is here. You connect it and it goes to the hot line.

Right? R-phase connection was made. And at number 20, a terminal comes out of the lamp.

Number 20 is here. This completes the lamp wiring. Then, if I hold this metal object to the sensor... Turn it on.

When you point it to the sensor, the lamp should light up. I'll see. The light comes on, right?

If you look at it this way, input and output are opposites. You can turn it around and think about it.

Anyway, if we think of a sensor as a switch, it is a switch, right? If you think of this as a button switch, you can think of it as just pressing a button, right?

Now, this time, we will take this NPN and make it into PNP. The output part is the same. I use it the same way.

Now, in the case of PNP, PNP is a positive P, so a positive voltage is output. Then, when there are P00 and P01, there are lamps in all inputs inside.

I told you. This connects to this COM, and we have plus 24 and minus 24 volts.

Then, since positive voltage is input, plus will be the input. Since positive voltage will be input, negative voltage should be the input here.

Then this time, the minus will be entered like this. So here we have this same sensor, right? It's a sensor. There are two sensors, brown and blue.

This time, the plus must be included. Then brown. The brown one is connected to the plus side, and the brown side goes to the plus voltage, so it looks like this.

But here they change brown and blue. Then, in the case of PNP and NPN sensors, there is a direction.

Since there is a direction, it is not recognized, and the signal continues to be transmitted. I will show you that as well.

The first time was negative. This time, this COM connected the negative voltage COM to 24V GND, and the sensor goes into plus 24V, and the blue goes through plus 24V, consumes it, and goes to P0.

The output is the same. Let me put a sensor on it. It's now a PNP runoff. What do you think? The light comes on.

But here, the brown and blue are reversed. If that happens, the sensor will not recognize it and the output will continue to go out.

Take a look at this brown and blue color. Brown has a minus sign, connect the blue line to the plus line, and connect the brown line to the terminal.

So what happens to him? It doesn't recognize it like this. The output just keeps coming out.

Anyway, even though I said it was a switch, there is an electronic device inside. Since there is a transistor element, the direction changes and the output continues to come out.

You have to remember this in your head. When using PNP, a plus comes out, so you hold the COM toward the minus side.

With NPN, you hold the COM toward the plus side because it comes out negative. And when the signals from the remaining sensors go, I set them as positive, so the negative ones appear in blue first.

There is direction. DC is connected to blue, and the negative voltage produced by its consumption goes into the PLC input.

You can think of it that way. The switch is the same too. Since it is the same as the sensor anyway, the switch has no direction.

The switch has no direction, so you can use it either left or right. Minus goes through the switch and enters the signal.

This way, whenever you press the button, you will see a signal coming out each time you press it. Uh... do you understand?

I explained it in a rather simple way, but if you don't understand it, the most important thing is to watch my video and try to get a PLC or something like this and configure the circuit like this.

It is the easiest to understand and the fastest to learn. I explained the circuit configuration so that input can be given and output received in this way even in a 2-wire type.

Anyway, I hope my explanation will be helpful to those who are new to automation.

My video description ends here. Try it again and again. If you watch it again and again, you will automatically understand.

To all of you who are new to automation, cheer up and thank you for watching so far. Thank you.

PLC 2선식센서 회로결선(스위치 결선) 총정리!!

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