Top organizations train their team with RealPars

daimler mercedes benz uses RealPars platform
Ford motors uses RealPars platform
General Electric uses RealPars platform
Pfizer uses RealPars platform
Tesla uses RealPars platform

After taking this course, you’ll be able to:

  • Explain the differences in Profibus DP and Profibus PA

  • Describe how Profibus DP andProfibus PA are used in PLC systems to communicate with remote I/O

  • Define the term “Decentralized Peripheral” and why it is important

  • Explain how and why Remote I/O is used in industrial applications

  • Describe the function of a Segment Coupler in a Profibus PA system

  • Explain the difference between Profibus and Profinet and in how each is used

  • Be able to describe and explain the terms: I/O, Local I/O, and Remote I/O

  • Explain the difference Remote I/O and Distributed I/O

  • Demonstrate how to connect a Profibus cable to a Profibus cable connector

Course curriculum

    1. 1. What is Profibus-DP?

    2. 2. What is Profibus-PA and how does it differ from Profibus-DP?

    3. 3. What is the Difference Profibus and Profinet?

    1. 4. What is a Remote I/O?

    2. 5. How are remote I/O and distributed I/O different?

    3. 6. How to wire a Profibus cable to a Profibus Connector?

About this course

  • €1.000,00
  • 6 lessons
  • 0.5 hours of video content

Ideal for you if…

  • You need to recommend or specify PLC hardware for remote I/O systems

  • You want to better understand the differences between Profibus DP and Profibus PA and between Profibus and Profinet

  • You need to understand the different methods for connecting field I/O to the controller

  • You need a better understanding of how to wire a Profibus cable to a 9-pin Profibus connector


Modern PLC systems use Remote I/O to connect sensors on the plant floor to PLC controllers located in a different location. This remote I/O strategy eliminates the need for long runs of wiring between each sensor on the plant floor and the PLC, which may be located a hundred feet away.

Using Profibus DP and Profibus PA, the engineer can design a system that uses a single cable to communicate I/O values over a digital bus from I/O cards located near the sensor locations. Interface cards are used at the remote I/O rack to connect the I/O information to the Profibus DP network. Profibus PA can be used to directly obtain data from process sensors and actuators over a separate bus but requires a segment coupler to allow this data to be transmitted to the PLC, which has only Profibus DP ports.

Profinet is another protocol that is popular for communication between PLC hardware and other devices, HMI panels, and Remiote I/O interfaces. Profinet is based on TCP/IP communication and is very different from Profibus DP or PA.

Profibus cables are RS-485 cables with a single pair of single-core wires. Special 9-pin DB shell connectors with terminating resistors are used to connect Profibus DP to a device, such as a PLC. One video of this course will demonstrate how to connect a Profibus cable to the connector, and show how to set the terminating resistor in each connector.

Prepare for better pay & bigger responsibility

Jake Watkins

Since I started training a few months ago, I can see there’s been a huge difference in how much more efficiently and effectively I can handle PLC repairs in the field. Our clients are telling management how happy they are to get back online more quickly and save money because I’m turning around faster fixes. I definitely recommend it for anyone who needs PLC training at any level.

Mario Flores

I needed to get up to speed on working with Siemens PLC equipment and came across RealPars training on YouTube. I watched my first video and immediately went to the website and signed up as a student. I like the way information is explained step-by-step and that it’s broken down into small chunks…I can go back and review anytime I want. I’m already seeing that I can perform repairs faster and with more confidence. Three of my co-workers were so impressed, they signed up for RealPars, too.

Here’s why you’ll succeed

  • One-on-one support

    Stuck or have a question? You get unlimited support from our team of proven PLC programming experts.

  • Laser-focused lessons

    We only teach you exactly what you need to know to master a PLC course. No fluff, filler, or wasting your time.

  • Experienced instructors

    All PLC training courses include step-by-step instructions from the world’s best so you can join their ranks and gain an unfair advantage.

Start learning now

You'll get lifetime access to this course.


  • Can I get a certificate for this course?

    "Introduction to Profibus" is a free course. No certificate will be granted for completing a free course. However, You will receive a personalized certificate of completion once you have fully finished a course (that provides a certificate) while being a Pro member.

  • What is the required software and hardware for this course?

    - TIA Portal for configuration of Profibus and Profinet hardware parameters
    - S7-300 PLC with Profibus port and Profinet Port
    - Profibus PA / Profibus DP segment coupler
    - Profibus DP 9-pin cable connector

  • Can my employer purchase a course for me?

    Yes. Most people enroll individually, and then submit their receipt to their employer for reimbursement. However, if your employer has a tuition budget and wants to train 5 people or more, you can send us an email at [email protected] and we will help you with bulk signup.

  • Can I register for a course if I am working full time?

    Of course. All of our course content is pre-recorded, so you can work and study on your own time.