This part of IEC 61158 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.
EN 61158-2:2010 history
2014EN 61158-2:2014 Industrial communication networks - Fieldbus specifications - Part 2: Physical layer specification and service definition
2010EN 61158-2:2010 Industrial communication networks - Fieldbus specifications - Part 2: Physical layer specification and service definition
2008EN 61158-2:2008 Industrial communication networks - Fieldbus specifications - Part 2: Physical layer specification and service definition [: CENELEC EN 61491]
2004EN 61158-2:2004 Digital data communications for measurement and control - Fieldbus for use in industrial control systems Part 2: Physical layer specification and service definition
1994EN 61158-2:1994 Fieldbus Standard for Use in Industrial Control Systems Part 2: Physical Layer Specification and Service Definition