IEC 61158-2:2007 specifies the requirements for fieldbus component parts. It also specifies the media and network configuration requirements necessary to ensure agreed levels of data integrity before data-link Layer error checking; interoperability between devices at the physical layer. This fourth edition cancels and replaces IEC 61158-2:2003. This edition of this part constitutes a minor revision. This publication, together with its companion parts for Type 16, also partially replaces IEC 61491:2002 which is at present being revised. IEC 61491 will be issued as a technical report. This edition includes the following significant technical changes with respect to the previous edition:
- deletion of the former Type 6 fieldbus for lack of market relevance;
- addition of new fieldbus types;
- generalization of the seldom-used Type 1 radio to a more useful form. This bilingual version (2014-04) corresponds to the monolingual English version, published in 2007-12.