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PI International

As far as maintenance, ongoing development, and market penetration are concerned, open technologies need a company-independent institution that can serve as a working platform. As regards the PROFIBUS and PROFINET technologies, this was achieved by founding the PROFIBUS Nutzerorganisation e.V. (PNO) in 1989 as a non-profit interest group for manufacturers, users, and institutions. The PNO is a member of PI (PROFIBUS & PROFINET International), an umbrella group which was founded in 1995. PI now has 25 regional user organizations (RPA: Regional PI Associations) and approximately 1,400 members, meaning that it is represented on every continent and is the world's largest interest group for the industrial communications field.

(Figure 21: PROFIBUS & PROFINET International)

Responsibilities of PI

The key tasks performed by PI are:

  • Maintenance and further development of PROFIBUS and PROFINET
  • Promotion of the worldwide establishment of PROFIBUS and PROFINET
  • Protection of the investments of users and manufacturers through influence on standardization
  • Representation of the interests of members to standards bodies and unions
  • Worldwide technical support for companies through PI Competence Centers (PICC)
  • Quality control through a system for product certification at PI test laboratories (PITL) based on standard conformity tests
  • Establishment of a worldwide training standard through PI Training Centers (PITC)

Technological Development

PI has handed responsibility for technological development over to PNO Germany. The Advisory Board of PNO Germany oversees the development activities. Technological development takes place in the context of more than 50 working groups with input from more than 500 experts.

Technical Support

PI supports more than 35 accredited PICCs worldwide. These facilities provide users and manufacturers with all kinds of advice and support. As institutions of the PI, they are independent service providers and adhere to mutually agreed upon regulations. The PICCs are regularly checked for their suitability as part of an individually tailored accreditation process. Current addresses can be found on the PI website.


PI supports 8 accredited PITLs worldwide, which assist in the certification of products with a PROFIBUS/PROFINET interface. As institutions of PI, they are independent service providers and adhere to mutually agreed upon regulations. The testing services provided by the PITLs are regularly audited in accordance with a strict accreditation process to ensure that they meet the necessary quality requirements. Current addresses can be found on the PI website.


The PI Training Centers have been set up with the specific aim of establishing a global training standard for engineers and installation technicians. The fact that the Training Centers and the experts that are based there have to be officially accredited means that quality is assured, not only with respect to the PROFIBUS and PROFINET training offered but also of the associated engineering and installation services. Current addresses can be found on the PI website.

Information platform - Internet

Also available on the PI website is actual information about the organization of PI and the PROFIBUS and PROFINET technologies. An online-product guide, a glossary, divers web-based trainings are to be found there, as well as the download area with specifications, application profiles, installation guidelines, and other documents.


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PROFINET is the innovative open standard for Industrial Ethernet. It satisfies all requirements of automation technology.

IO-LINK is an independent sensor / actuator interface solution for use with all automation technologies.



Omlox is an open technology standard for real-time indoor localization systems for industrial manufacturing.