Common language

Parallel to the development of ethernet, fieldbus technology developed in the 1980s – driven by the increased use of electrical automation technology. However, the various fieldbus protocols such as Interbus, DeviceNet and Profibus, were not used for networking computers at company level, but for serial or parallel connection of sensors and actuators to the control and management level.

Ultimately, the parallel development of the two transmission protocols established the form of the automation pyramid that is still valid today. The highest levels represent locally limited computer networks, and the lower levels comprise the signal, data and power transmission for recording and controlling. The shape of the pyramid resulted primarily from the hierarchical-logical arrangement of the different levels. High transmission rates and short distances via Ethernet, low transmission rates and long distances via fieldbus.

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