EVS-EN 60079-27:2008

This part of IEC 60079 contains the details of apparatus, systems and installation practice foruse with the Fieldbus Intrinsically Safe Concept (FISCO). It is based on the concepts ofManchester encoded, bus powered systems designed in accordance with IEC 61158-2 whichis the physical layer standard for Fieldbus installations.The constructional and installation requirements of FISCO apparatus and systems aredetermined by IEC 60079-11, IEC 60079-14, and IEC 60079-25, except as modified by thisstandard. Part of a Fieldbus device may be protected by any of the methods of explosionprotection listed in IEC 60079-0, appropriate to the zone of intended use. In thesecircumstances, the requirements of this standard apply only to that part of the apparatusdirectly connected to the intrinsically safe trunk or spurs.