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What is IO-Link?

Advantages of IO-Link

IO-Link is an internationally standardized, manufacturer-independent interface. The open standard (IEC 61131-9) is compatible with all common fieldbuses when implemented with a gateway.

Reduced Machine-related Costs

A cost-efficient standard cable establishes a connection up to 20 meters long between the IO-Link master and IO-Link device. The variety of interfaces is significantly reduced, as well as development and assembly costs. Interoperability also ensures a high level of investment protection.

High Machine Availability

Downtime is reduced because when a defective IO-Link device is replaced, its parameters are automatically transferred to the new sensor by the IO-Link master or control system. This allows even untrained personnel to replace the device without causing errors.


IO-Link devices can be positioned directly on the machine since they do not have to be accessible for parameterization. Parameter sets can be quickly changed via the IO-Link interface under different production conditions during operation, e.g. for switching thresholds or sensitivity.

Demand-oriented Maintenance

Continuous diagnostic data of the entire process can prolong maintenance intervals since systems and machines need to be maintained much less frequently, e.g. by means of automatic readjustment via IO-Link. Predictive maintenance is also possible. This is because the diagnostic data is transparently transported to the control system and to the Cloud via OPC UA.

Here You Can Learn More about IO-Link

IO-Link mit Bihl+Wiedemann: Easy, flexible & cost-effective

Bihl+Wiedemann offers a well thought-out concept for the integration of IO-Link. You benefit from freedom of topology, reduced wiring complexity without switches and a smart power supply concept. Further advantages include reduced IP management complexity and low-cost IO-Link masters, which we provide with 1, 2, 4, and 8 ports.

Main Cost Comparison Save up to 40 % on 50 Devices

In many application scenarios, IO-Link solutions from Bihl+Wiedemann are much more cost-effective than similar solutions from other providers. An application with Bihl+Wiedemann is already cheaper than comparable PROFINET variants from three 4-port IO-Link masters. Reduce costs by connecting digital I/Os directly.