Standardization (IEC)

The International Electrotechnical Commission (IEC) is a standardization body located in Geneva, Switzerland ( It strives for international standards to ensure safety, efficiency, reliability, and interoperability of electrical, electronic, and information technologies. The benefits of supporting and using these standards are:

  • High degree of quality of the documents
  • Worldwide accepted common terms and models
  • Independence of national support organizations
  • Enhancement of international trade
  • Preconditions for directives (laws) such as EMC, electrical safety, functional safety

IO-Link together with its extensions safety and wireless is a fieldbus and manufacturer independent communication solution for sensors, actuators, and mechatronics that can be integrated into any existing fieldbus, information technology, or automation system. Currently, the following IEC projects exist:

  • IEC 61131-9 Edition1 (based on IO-Link Interface and System, V1.1.2)
  • IEC 61131-9 Edition2 (based on IO-Link Interface and System, V1.1.3)
  • IEC 61139-2 (based on IO-Link Safety – System Extensions)
  • IEC 61139-3 (based on IO-Link Wireless – System Extensions)