Your Device Gets Connected - Protecting the investment in instruments with Foundation Fieldbus H1

The evaluation of the installed base and its further use is a key decision point in modernization projects. At the same time, Ethernet-based, state-of-the-art field device technology should often be used. For the first time, a product study by Pepperl+Fuchs presented a solution for field devices modern Profinet over Ethernet-APL and those with Foundation Fieldbus H1 (FF-H1) interface at Hannover Messe 2025.

  • Ethernet-APL Field Switch - Communication and power supply also for instrumentation communicating Foundation Fieldbus H1. Picture: Pepperl+Fuchs SE
    Ethernet-APL Field Switch - Communication and power supply also for instrumentation communicating Foundation Fieldbus H1. Picture: Pepperl+Fuchs SE
  • Integration via standardized proxy technologiy protects investment in existing instrumentation. Picture: Pepperl+Fuchs SE
    Integration via standardized proxy technologiy protects investment in existing instrumentation. Picture: Pepperl+Fuchs SE
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This introduced prototype is the result of intensive collaboration between Yokogawa and Pepperl+Fuchs and demonstrates the possibilities. The developers showed live at the fair how cyclic data traffic works simply and transparently. Engineering is based on the controller's standard tools using FF-H1 function blocks.

Proxy technology, which acts as an intelligent interface between FF-H1 and Profinet, provides the basis. The control system and FieldConnex field switch communicate via the Profinet protocol. Controlled and configured by the control system, the switch seamlessly translates the process values into the FF-H1 protocol and ensures that existing devices can remain in operation without restrictions. The system automatically handles standard tasks such as setting addresses and communications parameters. The switch provides a separate link master for each device, thus ensuring the fastest possible response times.

The engineering system uses the existing and certified device descriptions of the field devices. This implementation based on standards ensures a high degree of functional reliability and interoperability while avoiding the expense of product maintenance and re-certification. This solution concept impresses with its ease of implementation for users and manufacturers alike - as they are entitled to expect in times of digitalization.

Connection beyond instrumentation with Ethernet-APL, Pepperl+Fuchs has also showcased in Hannover connecting instruments. Available today are: Profibus PA via Proxy in Profinet and 4-20 mA signal and HART via remote I/O. Pepperl+Fuchs invites users and suppliers to talk shop, discuss the protection of the existing instrumentation and the future of digital communication in the field of process plants.