The IO-Link concept

More than just another interface

IO-Link is the smart concept for the standardized connection of sensors and switching devices to the control level by means of a low-cost point-to-point interface. The new communication standard below the fieldbus level enables a central diagnosing and locating of errors down to the sensor/actuator level, and facilitates the commissioning and maintenance, by permitting parameter data – directly from the application – to be dynamically changed. The result: higher plant availability and reduced engineering expenses. As an open interface, IO-Link can be integrated into all common fieldbus and automation systems. In doing so, consistent interoperability ensures a high degree of investment protection. This also applies within the framework of existing machine concepts for the continued use of sensors that do not have an IO-Link interface.

The new communication standard was developed by the IO-Link research group of the PROFIBUS & PROFINET International (PI) organization – presided over by Siemens. Forming the basis for the passed IO-Link specification, whose standardization has already been submitted to the IEC, are the critical performance characteristics of the IQ-Sense technology by Siemens, which has been providing for an intelligent communication between sensors and controllers since 2001.

Highest transparency down to the field level
Highest transparency down to the field level