Back to the Basics: IO-Link

In the last post about the Basics of Automation, we learned how distances, travel, angles and pressures can be measured contactlessly, whether linear or rotary. In this blog, let’s take a closer look at IO-Link technology.

Throughout the history of manufacturing, as the level of automation increased, the demand for intelligent field devices grew. A variety of interfaces with different mechanical and electrical characteristics were created, and the need for standardization grew. The cooperative work of several companies developed the viable solution. Like  USB in the PC world, IO-Link in automation leads to a considerable simplification of installation with simultaneously extended diagnostics and parameterization capability.

IO-Link 1

It’s a worldwide standardized I/O technology according to IEC 61131-9, in order to communicate from the control to the lowest level of automation. The universal interface is a fieldbus independent point-to-point connection that works with an unshielded industrial cable. The IO-Link Community founded in 2006, consisting of leading automation manufacturers, promotes IO-Link with the acronym “”USE””:

  • Universal – IO-Link is an international standard (IEC 61131-9)
  • Smart – IO-Link enables diagnostics and parameter-setting of devices
  • Easy – IO-Link provides great simplification and cost reduction

System Components

IO-Link master
Also mentioned as the heart of the IO-Link installation, it communicates with the controller via the respective fieldbus as well as downward using IO-Link to the sensor/actuator level.

Sensors and Actuators
The IO-Link capable intelligent sensors and actuators are connected directly to the IO-Link master via IO-Link. This enables the simplest installation, the best signal quality, parameterization and diagnostics.

Hubs
The sensor/actuator hub exchanges signals with the binary and/or analog sensors and actuators and communicates with the IO-Link master.

IO-Link 2

To learn more about the Basics of Automation, visit www.balluff.com.

Jan-Niclas Dewald has experience and knowledge of the industrial automation industry with Balluff. With his product and industry knowledge, he is sharing his passion for automation with Automation Insights.

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