New H1 Physical Layer Enhancements

This week we announced enhancements to the open, non-proprietary Foundation fieldbus physical layer technology. The latest updates to the H1 (31.25 kbit/s) physical layer specifications will improve the robustness of fieldbus control systems by optimizing device interoperability and integration. End users will benefit from easier installation, faster commissioning and seamless startups.
Enhancements to the Foundation fieldbus specifications include:

  • Addition of a test procedure for isolated couplers to the existing Foundation fieldbus Coupler Test Specification. Registration of isolated couplers is now possible.
  • Improvements to the H1 Physical Layer Conformance Test Specification based on Action Requests received during the last few years. The most significant changes include the addition of a receive jitter test case and a device-coupler interoperability test.
  • Updates to the H1 Physical Layer Test Specification to remove obsolete profiles and align new references in the document with the current International Electrotechnical Commission (IEC) specifications. Coupler profiles were also added to the test specification.

Implementation of the new Foundation fieldbus H1 Physical Layer Test Specification Version 2.0 is not immediately required. However, fieldbus device developers are encouraged to start using the specification as soon as possible. The updated specification will become mandatory with the next major release of the Fieldbus Foundation’s Interoperability Test Kit (ITK). Until then, developers can still provide proof of conformance to Version 1.5 of the specification when registering a device.
For more information, please visit the Technical Specifications Page.

About FieldComm Group

The FieldComm Group is a global standards-based organization consisting of leading process end users, manufacturers, universities and research organizations that work together to direct the development, incorporation and implementation of new and overlapping technologies and serves as the source for FDI technology. The FieldComm Group’s mission is to develop, manage and promote global standards for integrating digital devices into automation system architectures while protecting process-automation investments in HART and FOUNDATION Fieldbus communication technologies. Membership is open to anyone interested in the use of the technologies. For more information, visit their web site at www.fieldcommgroup.org.

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