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Measuring amplifier with fieldbus

The measuring amplifiers with fieldbus are used in automation technology or in test benches. The fieldbus is used to connect sensors and actuators to a control computer or a programmable logic controller. The fieldbus enables data exchange over long distances efficiently and safely and usually in real time.

Fieldbuses based on Ethernet technology are referred to as "Industrial Ethernet". Ethernet-based fieldbuses include EtherCAT, Profinet IO and Ethernet

Examples of fieldbus protocols

Well-known fieldbus protocols include:

  • CAN, used in the automotive sector,
  • CANopen, used e.g. in elevator technology or ship electronics,
  • EtherCAT used in test benches and production plants, in robotics and mechanical engineering,
  • Profinet IO used in test benches and production plants, in robotics and mechanical engineering,
  • Ethernet/IP used in production plants and robotics, preferably in the USA.

Advantages of fieldbus systems

The advantages of fieldbus systems over standard interfaces such as RS232, USB, RS485, analog signal are:

  • less effort for cabling,
  • higher security against interference,
  • cross-manufacturer standardization through standards and norms

Disadvantages of fieldbus systems

  • high complexity of the systems high cost of the components,
  • longer reaction time compared to standard interfaces,
  • higher risk due to common bus for sensors and actuators,
  • lack of compatibility between the different systems.

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