I think there is no need for a pull up or pull down resistor. The multimeter set as a voltmeter will not close the circuit thus no current draw will happen. But it is always a good practice to follow the diagram. A PLC or a controller usually has those resistors inbedded in their inputs. Thank you for this good video.
@@brs293 the prox sensor has an internal resistor. A voltmeter will show you change from high to low or low to high when triggering without the need for an external resistor. Yes, the output will be a sink (npn) or a source (pnp), so, for testing purposes, just be careful not to connect any voltage or any ground there (to the black wire) without a resistor to limit the current. A voltmeter is ok.
I know I'm a lil late to the convo....Lol......but, yeah, you have to have a load connected to the signal wire. In the field, the plc input is the load, but if you want to bench test, you have to run it thru a load. I usually use a LED.
I have worked as a technician in production plants for many years and have worked on proxy's often. Yours was a very concise and simple explanation. Hope all is well.
I went to TH-cam to see how to test an inductive proximity sensor and found yours. Your video helped me determine that my sensor was still good. Unfortunately that wasn't good news. I still have an issue with my 3D printer. But I wouldn't have known without this video. Thank you I will be looking at more of your videos.
Thank you so much for explaining this. A proximity switch just went bad on one of our CNC Mills at work. The machine dealer wants to charge double what the sensor would cost out of a parts catalog. This will help me greatly in determining which sensor I need to order, PNP or NPN.
Chip Wright I worked in the laundry facility and most machines like folders and feeders uses proximity sensors this help me understand how sensors works thanks for the video
Very good video I run this type of sensors to a stamping presses with multiple sensor build in and this sensor have save lot of problems with crashing the tool and cut the repair cost a lot Thank you
Thank you sir, very informative! Quick question: At the risk of sounding ignorant, how would you go about bypassing these sensors if one were to go bad? Please respond when you have time. Once again, thank you.
I would describe that "the so called pull up resistor in this video" as the Load. Load meaning whatever connected to the proximity sensor to receive and process the proximity sensor output signal.
Hi, I’m currently using a NPN capacitive sensor with a 12v power supply and planning to use an Arduino Mega as my microcontroller. As mentioned in the video, the output signal voltage of the load wire will be the same as the input voltage and as of what I know an Arduino cannot handle 12v input. Sorry guys I’m a toddler when it comes to electrical circuits. But my question is should I add a resistor to have a voltage drop before the input signal enters the Arduino or should I use a voltage regulator instead to step down the voltage before it enters my Arduino. Thank you !
th-cam.com/video/b0bCvgr84Tc/w-d-xo.html I would use an opto-coupler to isolate the high voltage side of the sensor from the low voltage side of the Arduino input. Click on the link above to view one of my videos on opto-couplers Thank you so very much for stopping by and watching one of my videos.
Awesome video. Like you said, it doesn’t take much to entertain an old man (me). I have a sensor that I would like to test but I don’t know if it is NpN or PNP. How would I go about it? Will I damage it if I get it wrong the first time? Thanks
hello, it's a very nice video whose I need curently. I have one question: what is the value of the resistance? and do you choose the value of the resistance? In advance thank you very much.
Normall,how much Ω of the resistor used in this diagram?Do you mean we have to use the resistor in the loop to test the sensor?If we don't have the resistor on hand,we can't test the sensor yes？Or other simpler way？
hi peepaw sir you tell me how can i creat the circuit of proximity sensor 3wire 24vdc in put (analog out put 0-10v = metal 10mm distance i mean voltage variable with metal distance ) i hope you dont ignore it
Peepaw McDonald, I bought a Digital Counter from ebay, made in China. The inductive proximity sensor that came with it is NPN - NC....It has three different set of instructions on how to wire it up. The tiny instructions on the sensor show to use a resistor, as you are doing, but the Ohms is in Chinese, so I don't know what value to use. I tried wiring it up as you show here with a 10k resistor, but it doesn't work right. Matter of fact, every way I wire it, the set count happens all at once. In other words, if I set the Counter to count to 40 and actitvate it's relay, the count goes from 1 to 40 all at once instead of each time it's flagged. The LED stays on all the time too. I guess an evil China Man is laughing at me right about now.
hello sir , this was the exact video i was searching ,very useful. Can i ask a question , will the output of all PNP proximity sensors will be fixed to around 15 vdc as we saw in video or it may vary ? I am having an under speed monitoring proximity sensor (model XS530BLPAL2) / PNP output getting connected to a safety relay, If i get to know the output i will stimulate externally to keep the relay healthy. Looking forward for your reply ,thank you.
Hi, mister McDonald. Thank you for the great video about proximity sensors. Are there proximity sensors with configurable output (pnp/npn)? If you have a one , could you please make a video explaining their setup and operation. I'm sorry for my English, I'm from Caucasus region of Russia. Thank you very much, sir. Good luck!
Hello, I have never seen a configurable proximity sensor. The proximity sensors that I have run acrossed have been fixed as either NPN or PNP. That would be very interesting if you could construct a proximity sensor with your idea of NPN or PNP Outputs. I like the way you think. I would have never thought of your idea. Well done.
Peepaw McDonald I think, i have found the one with both pnp and npn outputs. Additionally it can be configured to NO/NC. But its expensive for average russian company, the sensor costs 90 USD. www.schneider-electric.us/en/product/XS1M18KP340D/inductive-sensor-xs1-m18---l72mm---brass---sn5mm---12..24vdc---m12/
Yes Sir, this Fluke has been my friend for 30 years. And when I bought it brand new it broke the bank. HaHa... But she has been very faithful... I would never trade her in on something new...
It is interesting how (at least) my mind works. The schematic shows the gate to be in the center, source and drain on the outside. Your actualy wiring, output/drain in the center. Same type of stuff goes on in the classroom and online. The gate is always at the center in diagrams. While in real world the base of a transistor seems to always be on the right, outside pin. Drain at the center and so-called source/ground (which is contradictory term in and of itself) is the very left leg/pin. And you also have your actual wire set up like a real transistor leg. It is the type of things that confuse me as my mind remember things in the term of position. And when the position of the same thing is contradictory, it throws me off total shamble.
HaHa... when I get to hell, I will tell them to speed things up just a hair :) Oh wait, I am there already HaHa... Thanks for stopping by and watching one of my videos. Have a great day :)
![เจ็บที่ยังฮัก - ม่อน วรวิทย์ [ Official Mv ] จอนนี่มิวสิค](http://i.ytimg.com/vi/KALIGSRSjFs/mqdefault.jpg)
That’s a load/ resistor. Can be a coil to a relay or contactor. Or PLC input. NPN will switch the negative and PNP will switch positives to loads.
I think there is no need for a pull up or pull down resistor. The multimeter set as a voltmeter will not close the circuit thus no current draw will happen. But it is always a good practice to follow the diagram. A PLC or a controller usually has those resistors inbedded in their inputs. Thank you for this good video.
He says in the video, the sensor is an open collector and you have to have the resistor.
@@brs293 the prox sensor has an internal resistor. A voltmeter will show you change from high to low or low to high when triggering without the need for an external resistor. Yes, the output will be a sink (npn) or a source (pnp), so, for testing purposes, just be careful not to connect any voltage or any ground there (to the black wire) without a resistor to limit the current. A voltmeter is ok.
I know I'm a lil late to the convo....Lol......but, yeah, you have to have a load connected to the signal wire. In the field, the plc input is the load, but if you want to bench test, you have to run it thru a load. I usually use a LED.
Dear Mr.Mcdonald, Just wanting to say thank you for so many informative videos, have learned so much. Many thanks, joseph
I have worked as a technician in production plants for many years and have worked on proxy's often. Yours was a very concise and simple explanation. Hope all is well.
I went to TH-cam to see how to test an inductive proximity sensor and found yours. Your video helped me determine that my sensor was still good. Unfortunately that wasn't good news. I still have an issue with my 3D printer. But I wouldn't have known without this video. Thank you I will be looking at more of your videos.
You have completely de-mystified the difference for me. A short and very concise lesson. Thanks.
Great simple straightforward demonstration of proximity sensor
Thank you so much for explaining this. A proximity switch just went bad on one of our CNC Mills at work. The machine dealer wants to charge double what the sensor would cost out of a parts catalog. This will help me greatly in determining which sensor I need to order, PNP or NPN.
Chip Wright I worked in the laundry facility and most machines like folders and feeders uses proximity sensors this help me understand how sensors works thanks for the video
Really great to share the knowledge to everyone.
Very good video
I run this type of sensors to a stamping presses with multiple sensor build in and this sensor have save lot of problems with crashing the tool and cut the repair cost a lot
Thank you
Thank you sir, very informative! Quick question: At the risk of sounding ignorant, how would you go about bypassing these sensors if one were to go bad? Please respond when you have time. Once again, thank you.
I would describe that "the so called pull up resistor in this video" as the Load. Load meaning whatever connected to the proximity sensor to receive and process the proximity sensor output signal.
Very nice explanation
Thank you so much sir! Greetings from Chile!
lets say you have not got the bags with the information of sensor type being npn or pnp. How would you figure it out if the sensor is npn or pnp ?
With the NPN you could power the sensor from 12v and the pull up resistor by 5v, so no logic level conversion needed. Not so with the PNP sensor.
Great info, finally something that shows of it works.
what brand are those proximity sensor ? i am looking for NPN shielded capacitive sensor with 4 mm detecting distance . Thanks for putting the video.
Hi, I’m currently using a NPN capacitive sensor with a 12v power supply and planning to use an Arduino Mega as my microcontroller. As mentioned in the video, the output signal voltage of the load wire will be the same as the input voltage and as of what I know an Arduino cannot handle 12v input. Sorry guys I’m a toddler when it comes to electrical circuits. But my question is should I add a resistor to have a voltage drop before the input signal enters the Arduino or should I use a voltage regulator instead to step down the voltage before it enters my Arduino. Thank you !
th-cam.com/video/b0bCvgr84Tc/w-d-xo.html
I would use an opto-coupler to isolate the high voltage side of the sensor from the low voltage side of the Arduino input. Click on the link above to view one of my videos on opto-couplers Thank you so very much for stopping by and watching one of my videos.
@@PeepawMcDonald same like a PLC .
You need to protect your Arduino inputs with OPTO-COUPLER as a PLC's system work .
Which one is better used for turn on relays or turning them off
My explosion proof projects require reflectors bouncing off the sensor to make it work. Some of our products are clear.
Awesome video. Like you said, it doesn’t take much to entertain an old man (me). I have a sensor that I would like to test but I don’t know if it is NpN or PNP. How would I go about it? Will I damage it if I get it wrong the first time? Thanks
hello,
it's a very nice video whose I need curently.
I have one question: what is the value of the resistance?
and do you choose the value of the resistance?
In advance thank you very much.
very educative video, well done
Thank you so much for this great video :)
im gonna try this been trying to learn and teach myself
its fun to trigger your brain ..
Great information....... thank you sir
Normall,how much Ω of the resistor used in this diagram?Do you mean we have to use the resistor in the loop to test the sensor?If we don't have the resistor on hand,we can't test the sensor yes？Or other simpler way？
hi peepaw sir
you tell me how can i creat the circuit of proximity sensor 3wire 24vdc in put (analog out put 0-10v = metal 10mm distance i mean voltage variable with metal distance ) i hope you dont ignore it
Great video thanks
Good information
Wonderful
Peepaw McDonald,
I bought a Digital Counter from ebay, made in China. The inductive proximity sensor that came with it is NPN - NC....It has three different set of instructions on how to wire it up. The tiny instructions on the sensor show to use a resistor, as you are doing, but the Ohms is in Chinese, so I don't know what value to use. I tried wiring it up as you show here with a 10k resistor, but it doesn't work right. Matter of fact, every way I wire it, the set count happens all at once. In other words, if I set the Counter to count to 40 and actitvate it's relay, the count goes from 1 to 40 all at once instead of each time it's flagged. The LED stays on all the time too.
I guess an evil China Man is laughing at me right about now.
what happens if there is no resistor
😀 gracias desde cd Juárez Chihuahua
Here is when a analogs meter becomes handy
hello sir , this was the exact video i was searching ,very useful. Can i ask a question , will the output of all PNP proximity sensors will be fixed to around 15 vdc as we saw in video or it may vary ? I am having an under speed monitoring proximity sensor (model XS530BLPAL2) / PNP output getting connected to a safety relay, If i get to know the output i will stimulate externally to keep the relay healthy. Looking forward for your reply ,thank you.
The output voltage is based on the input voltage
Hi, mister McDonald. Thank you for the great video about proximity sensors. Are there proximity sensors with configurable output (pnp/npn)? If you have a one , could you please make a video explaining their setup and operation. I'm sorry for my English, I'm from Caucasus region of Russia. Thank you very much, sir. Good luck!
Hello, I have never seen a configurable proximity sensor. The proximity sensors that I have run acrossed have been fixed as either NPN or PNP. That would be very interesting if you could construct a proximity sensor with your idea of NPN or PNP Outputs. I like the way you think. I would have never thought of your idea. Well done.
Peepaw McDonald I think, i have found the one with both pnp and npn outputs. Additionally it can be configured to NO/NC. But its expensive for average russian company, the sensor costs 90 USD.
www.schneider-electric.us/en/product/XS1M18KP340D/inductive-sensor-xs1-m18---l72mm---brass---sn5mm---12..24vdc---m12/
I have some of those pnp and npn they are photo sensors
i was looking at your multimeter and was like "i also need one" then searched for your Fluke 87 and saw it costs like 600 Euro... Nah im fine Lmao
Yes Sir, this Fluke has been my friend for 30 years. And when I bought it brand new it broke the bank. HaHa... But she has been very faithful... I would never trade her in on something new...
@@PeepawMcDonald I bought Fluke 110 for few months ago.
thank you very much sir
It is interesting how (at least) my mind works.
The schematic shows the gate to be in the center, source and drain on the outside. Your actualy wiring, output/drain in the center.
Same type of stuff goes on in the classroom and online.
The gate is always at the center in diagrams.
While in real world the base of a transistor seems to always be on the right, outside pin. Drain at the center and so-called source/ground (which is contradictory term in and of itself) is the very left leg/pin.
And you also have your actual wire set up like a real transistor leg.
It is the type of things that confuse me as my mind remember things in the term of position. And when the position of the same thing is contradictory, it throws me off total shamble.
Music in too anointed
Ur video is too slow like hell but nice info 👌
HaHa... when I get to hell, I will tell them to speed things up just a hair :) Oh wait, I am there already HaHa... Thanks for stopping by and watching one of my videos. Have a great day :)
i love the fluke 87v ..the pro stuf