SSH EN 61158-2:2008

Rrjetat e komunikimit industrial - Specifikimet e bus terenit - Pjesa 2: Specifikimet e shtresave fizike dhe përkufizimi i shërbimeve

Industrial communication networks - Fieldbus specifications - Part 2: Physical layer specification and service definition

Scope

It 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. It 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.