Shadowing-Übung: Sinking and Sourcing PLC Inputs Explained | What is the Difference? - Englisch Sprechen Lernen mit Video
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In this video, we're going to talk about syncing and sourcing PLC digital input modules and how they're connected to field devices.
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We will be using a Siemens digital input module with this part number.
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If you want to order this module online, you can head on over to the RealPars Marketplace or simply click on this link here.
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The two types of PLC input modules are digital and analog.
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A digital input module accepts inputs from digital devices such as switches and proximity sensors.
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The input module will detect one of the two possible conditions of an input device, open or closed.
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For example, a push -button switch is a digital device and can either be open or closed.
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We will examine how the input module detects the input device condition later in this video.
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The focus of our video is on digital input modules.
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Okay, let's go.
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As we said earlier, a digital input module will detect one of the two possible conditions of an input device, open or closed.
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So, the question is, how does the input module know if the input device is open or closed?
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All we need to do is construct a closed circuit containing the input device,
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the PLC input module, and a 24 volt DC power supply.
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If the switch is open, there is 0 volts at the module input terminal.
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If the switch is closed, there is a positive 24 volts at the module input terminal.
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The input module will detect either a no voltage or voltage condition at the input.
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These voltage conditions represent the open or closed conditions of the switch.
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These voltage or non -voltage conditions are represented by ones and zeros in the PLC memory.
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Every input device is connected the same way.
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If you have a 64 input module, it's possible to have 64 separate circuits.
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We'll show you more examples later.
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Alright, now that we know how the digital input module determines the input device condition,
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let's talk about the current flow between the power supply and the input module.
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There is a current flow, but it is very small and usually under 10 milliamps.
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Notice in our example that the current is flowing into the PLC module.
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Depending on the type of PLC input module and how it's connected with the input device, the current could flow in or out of the module.
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That's where the terms sinking and sourcing come into the picture.
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Let's spend some time clearing up any misconceptions you might have about these terms.
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When we talk about sinking and sourcing, it's all about defining the direction of conventional current flow between two devices.
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Think of it this way, current is flowing between device number 1 and device number 2.
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Ask yourself, which direction is the current flowing?
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The current is flowing from device number 1 to device number 2.
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Therefore, we say device number 1 is sourcing the current, and device number 2 is sinking the current.
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Okay, what if the current is flowing from device number two to device number one?
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In this case, we say device number two is sourcing the current, and device number one is sinking the current.
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In every situation where you have a current flow between two devices, one of the devices will be sourcing and the other will be sinking.
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PLC vendors manufacture both sinking and sourcing digital input modules.
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Let's explore what they are and how they differ.
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Remember what we discussed earlier, it's all about the direction of conventional current flow.
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Let's have a look at two devices with current flowing between them.
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One device is a PLC input module, and the second device is a push -button switch.
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Based on the connection polarity, the syncing module will have the current flowing into it from the switch.
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Ok, let's do that again, but this time our PLC input module will be a sourcing module.
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Based on the connection polarity, the sourcing module will have the current flowing out of it.
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Current can flow in either direction through a push -button switch because it is a passive device and not polarity -dependent.
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There are many active digital input devices used in industry today that are polarity -dependent.
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They must be wired correctly or they will not work at all.
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These active devices will be labeled as either syncing or sourcing.
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You can learn more about active sensors in our other videos.
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We'll direct you there at the end of this video.
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If you recall, earlier we said that when there are two devices with current flowing between them, one device will be sourcing and one will be syncing.
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If the input device is a sourcing type, the PLC input module must be a syncing type.
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If the input device is a syncing type, the PLC input module must be a sourcing type.
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Adding confusion to already murky concepts,
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some vendors refer to syncing and sourcing input devices as NPN and PNP.
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You can learn more about NPN and PNP in our other videos.
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We'll direct you there at the end of this video.
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Here's something to remember.
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An NPN device is a syncing device.
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A PNP device is a sourcing device.
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The Siemens Digital Input Module 6ES7521 -1BH50 -0AA0 is a sourcing type.
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If you want to order this PLC module to use in your project, you can find the link in the video description.
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Let's connect a push -button switch and a syncing proximity sensor to two of the inputs.
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The current is flowing out of the PLC module because it is a sourcing type.
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Let's have a look at a syncing module.
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The Phoenix Contact Digital Input Module AXLSEDI16 -1 is a syncing type.
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You can find the link to order this PLC module in the video description as well.
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Let's connect a push -button switch and a sourcing proximity sensor to two of the inputs.
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The current is flowing into the PLC module because it is a syncing type.
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If you want to learn more, you might want to review two of our other videos called
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How to Wire Discrete DC Sensors to PLC Part 2 and What is a Transistor Working Principles.
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You can find the links to these videos in the description.
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Ok, let's review what we've covered in this video.
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A digital input module will detect one of the two possible conditions of an input device, open or closed.
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Digital input modules detect either a no voltage or voltage condition at the input.
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A sinking input module will have the current flowing into it.
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A sourcing input module will have the current flowing out of it.
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PLC vendors offer both syncing and sourcing digital input modules.
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An NPN device is a syncing device.
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A PNP device is a sourcing device.
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Want to learn PLC programming in an easy -to -understand format
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and take your career to the next level? head on over to realpars .com
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Wortschatz und Sprechhinweise zu dieser Lektion
Diese Sprechübung basiert auf dem Video „Sinking and Sourcing PLC Inputs Explained“. Diese Wörter kommen am häufigsten vor: input, device, module, current, sourcing. Dieses Video enthält 83 Sätze und 1146 Wörter zum Nachsprechen. Der gesprochene Teil dauert 8:30. Der Sprecher spricht gleichmäßig mit etwa 135 Wörtern pro Minute – ein angenehmes Tempo fürs Shadowing. Nur 74 % der Wörter gehören zu den 3.000 häufigsten im Englischen, der Wortschatz ist also anspruchsvoll.
Wichtiger Wortschatz in diesem Video
15 lernenswerte Wörter aus dem Video, mit Aussprache und Bedeutung:
| Wort | Aussprache | Bedeutung |
|---|---|---|
| module Substantiv | /ˈmɑd͡ʒul/ | Modul |
| sink Verb | /ˈsɪŋk/ | sinken |
| voltage Substantiv | /ˈvəʊltɪd͡ʒ/ | Spannung |
| detect Verb | /dɪˈtɛkt/ | entdecken |
| connect Verb | /kəˈnɛkt/ | verbinden |
| sensor Substantiv | /ˈsɛn.sɚ/ | Sensor |
| proximity Substantiv | /pɹɒkˈsɪm.ɪ.ti/ | Nähe, Nachbarschaft |
| vendor Substantiv | /ˈvɛn.dɚ/ | Anbieter, Vertreiber |
| circuit Substantiv | /ˈsɝ.kɪt/ | Umlauf |
| terminal Substantiv | /ˈtɚmɪnəl/ | Terminal |
| dependent Adjektiv | /dɪˈpɛndənt/ | abhängig, angewiesen |
| conventional Adjektiv | /kənˈvɛnʃənl̩/ | konventionell |
| format Substantiv | /ˈfɔːɹ.mæt/ | Format |
| refer Verb | /ɹɪˈfɜː/ | verweisen |
| label Substantiv | /ˈleɪ.bəl/ | Etikett, Etikette |
Phrasal Verbs, die du hören wirst
| Wort | Aussprache | Bedeutung |
|---|---|---|
| clear up Verb | /klɪəˈɹʌp/ | aufklären |
Sätze zum Wiederholen
Kurze, vollständige Sätze aus dem Video, die du im Alltag wiederverwenden kannst:
- We'll show you more examples later.
- Let's explore what they are and how they differ.
- Let's have a look at a syncing module.
Aussprache, auf die du achten solltest
Der Sprecher verwendet 6 Kurzformen und abgeschwächte Formen, zum Beispiel we'll, they're, we're. Sprich sie in der kurzen Form, so wie du sie hörst.
- Die Laute „sh“ und „zh“: conventional /kənˈvɛnʃənl̩/, confusion /kənˈfjuːʒən/, misconception /ˌmɪs.kənˈsɛp.ʃən/
- Lange Wörter – auf die Betonung achten: proximity /pɹɒkˈsɪm.ɪ.ti/, polarity /pəˈlæɹɪti/, misconception /ˌmɪs.kənˈsɛp.ʃən/
Laute, die Deutschsprachigen schwerfallen:
- Stimmhafter Auslaut — /b/, /d/, /g/, /z/, /v/ am Wortende nicht verhärten: voltage /ˈvəʊltɪd͡ʒ/, depend /dɪˈpɛnd/, passive /ˈpæs.ɪv/, analog /ˈænəlɔɡ/
- /æ/ — offener als „ä“: format /ˈfɔːɹ.mæt/, examine /ɪɡˈzæmɪn/, passive /ˈpæs.ɪv/, analog /ˈænəlɔɡ/, polarity /pəˈlæɹɪti/
- /dʒ/ — stimmhaft, nicht „tsch“: module /ˈmɑd͡ʒul/, voltage /ˈvəʊltɪd͡ʒ/
So übst du mit diesem Video
- Höre dir das ganze Video einmal an, ohne zu sprechen, und notiere die Wörter, die du nicht kennst.
- Sprich Satz für Satz in normaler Geschwindigkeit nach und wiederhole jeden, bis dein Rhythmus zum Sprecher passt.
- Nimm dich auf und vergleiche mit dem Original; achte dabei auf Wörter wie module, sink, voltage.
Was ist die Shadowing-Technik?
Shadowing ist eine wissenschaftlich fundierte Sprachlerntechnik, die ursprünglich für die professionelle Dolmetscherausbildung entwickelt und durch den Polyglotten Dr. Alexander Arguelles populär gemacht wurde. Die Methode ist einfach aber wirkungsvoll: Du hörst englisches Audio von Muttersprachlern und wiederholst es sofort laut — wie ein Schatten, der dem Sprecher mit nur 1–2 Sekunden Verzögerung folgt. Anders als passives Hören oder Grammatikübungen zwingt Shadowing dein Gehirn und deine Mundmuskulatur, gleichzeitig echte Sprachmuster zu verarbeiten und zu reproduzieren. Studien zeigen, dass es Aussprachegenauigkeit, Intonation, Rhythmus, verbundene Sprache, Hörverständnis und Sprechflüssigkeit signifikant verbessert — was es zu einer der effektivsten Methoden für die IELTS Speaking-Vorbereitung und reale englische Kommunikation macht.