IEC 61158-2:2010 specifies the requirements for fieldbus component parts. It also specifies the media and network configuration requirements necessary to ensure agreed levels of:a) data integrity before data-link layer error checking;b) interoperability between devices at the physical layer. The fieldbus physical layer conforms to layer 1 of the OSI 7-layer model as defined by ISO 7498 with the exception that, for some types, frame delimiters are in the physical layer while for other types they are in the data-link layer. This fifth edition cancels and replaces the fourth edition published in 2007 and constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition:- for Type 18, Table 157 reduced tolerance to 5 %;- for Type 18, in 32.5.3.1 removed minimum cable length;- for Type 18, in 32.5.4. and R.2.2 cable reference removed;- for Type 18, Table 160 and 161 terminating resistor value changed to 680 Ω. This bilingual version published in 2011-12, corresponds to the English version published in 2010-07.
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.
IEC 61158-2:2014 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 and interoperability between devices at the physical layer. The fieldbus physical layer conforms to layer 1 of the OSI 7-layer model as defined by ISO 7498 with the exception that, for some types, frame delimiters are in the physical layer while for other types they are in the data-link layer. This sixth edition cancels and replaces the fifth edition published in 2010. It constitutes a technical revision. This edition includes the following changes: - new Type 20 specification; - new Type 24 specification; - RS232 media specification for Type 4 removed.
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