In connection with the electronic pressure switch PSD-30, I often get asked what is IO-Link and how it is defined. IO-Link is a new communication interface in the area of factory automation/ machine building. Leading providers of automation technology have joined together to form the “IOLink consortium” and specified this new interface. This interface can be used to exchange information on the already existing signal line all the way down to the field level, using a serial protocol.
The advantage is that, for example in the case of a pressure switch, bidirectional communication is possible via the already existing 3-wire connection. The following data can be exchanged using the standardized protocol:
- Measurement values: analogue or digital
- Configuration parameters: centrally from the control system to the sensor/actuator
- Diagnostic information: from the instrument to the control system