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The standard for Industry 4.0


With the advent of the 4th industrial revolution, comprehensive data and increased flexibility are essential during the production process. This requires smart sensors and actuators at field level.  IO-Link is an effective and efficient technology that optimally exploits the capacity of these sensors and actuators

What advantages does IO-Link offer?

IO-Link is the first globally standardised IO technology (IEC 61131-9) for communication with sensors and actuators, and is therefore a core technology for Industry 4.0.

Installation and setup times are minimised by establishing sensor parameters, e.g. via SensoIO. Saving the last set of parameters in the IO-Link master enables a quick and simple replacement of devices.

Thanks to IO-Link, additional information can be retrieved on operating hours, switching cycles and signal quality, enabling rapid reaction and targeted maintenance in the event of an error - thus avoiding unnecessary downtimes. Standardised technology ensures fast, error-free signal transmission. Incorrect or missing measured values are therefore excluded, and sensor adjustment is even possible while a process is running. With IO-Link, every production facility becomes a smart factory.

IO-Link sensors from SensoPart

By opting for IO-Link sensors from SensoPart, you benefit from numerous advantages:

  • Extended adjustment options through smart functions
  • Output of RGB color values
  • Absolute adjustable switching point in mm-range for all sensors with background suppression, as well as for distance sensors
  • Adjustable mean value filter for distance sensors
  • Output of signal quality, e.g. to monitor possible changes over time


  • IO-Link functions with all control systems using Ethernet-based fieldbus systems, such as EtherNet/IP and Profinet.
  • The control system and sensor communicate bidirectionally through point-to-point connection.
  • In terms of hardware, standard M5, M8 or M12 connectors are used, as well as unshielded 3, 4 or 5 wire cables, measuring max. 20 m in length.

Operating mode

IO-Link sensors can be operated in two different modes:
  • IO-Link mode
  • SIO mode (Standard I/O mode)
    In SIO mode, the sensor functions in the same manner as its conventional counterpart, so that IO-Link sensors can also be operated without an IO-Link structure.

IO-Link sensors can be operated in both IO-Link mode and classic Standard I/O mode.

Data types:
  • Process data: switching status or measuring distances
  • Device data: acyclic query of parameters, identification data and diagnostic information
  • Results: error messages and warnings


Each IO-Link device has an electronic device description: the IODD (IO device description) that can be interpreted and displayed on all IO-Link-compatible system environments. The IODD includes the following information:

  • Communication properties
  • Device parameters with value range and standard value
  • Identification, process and diagnostic data
  • Device data
  • Text description
  • Image
  • Manufacturer’s logo

Looking for the right IODD for your IO-Link sensor?

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IO-Link system architecture

IO-Link devices

IO-Link devices comprise all sensors and actuators that can be connected to the system. Our sensors with IO-Link offer multiple advantages in comparison to conventional devices. Take a look at our extensive portfolio:

IO-Link software

Our SensoTune software can be used to define sensor parameters, as well as to visualise process data, and is compatible with all sensors with an integrated IO-Link interface. The user interface is designed so that functions are read from the IODD. This allows, for example, a centralised adjustment of switching points without having to modify settings on the sensor itself.


IO-Link master

The IO-Link master SensoIO enables communication with connected IO-Link sensors and the automation system. Both IO-Link and standard sensors and actuators can be connected to the control system through the IO-Link master.

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