CLC/TC 65CX - Fieldbus

IEC/TR 62685:2010 provides information about the assessment aspects of safe communication such as test beds, proof of increased interference immunity (EMC for functional safety), electrical safety, and other environmental requirements. It is only applicable to safety devices for functional safety communication which are developed according to IEC 61508 and IEC 61784-3 and covers general industrial environments such as defined in IEC 61131-2 or IEC 61000-6-2 and process automation environments such as those covered in the IEC 61326 series. Reference is made to the ERS (Equipment Requirements Specification) and/or SRS (Safety Requirements Specification) of a particular safety application to verify the necessary immunity of devices and systems according to IEC 61508. This bilingual version (2013-04) corresponds to the monolingual English version, published in 2010-12.

This standard applies to straight thermocouples for the nominal pressure level PN 1, which are made of standardized components (connection head, protection tube and thermocouple(s)). Details regarding the operational areas of the thermocouples and the use of protection tubes are part of this standard. Connection heads as well as stop flanges and threaded bushings for the mounting of the thermocouples are also part of this standard. Special designs are to be agreed upon between manufacturer and user.

IEC 61918:2010(E) specifies basic requirements for the installation of media for communication networks in industrial premises and within and between the automation islands, of industrial sites. This standard covers balanced and optical fibre cabling. It also covers the cabling infrastructure for wireless media, but not the wireless media itself. Additional media are covered in the IEC 61784-5 series. This second edition cancels and replaces the first edition published in 2007 and Corrigendum 1 (2009). It constitutes a technical revision. This edition includes the following technical changes with respect to the previous edition: - 4.4.7.2.1 is updated; - 4.4.7.3.4 is updated; - 5.7.4.3 is updated as result of the revision of the installation profiles; - 6.2.3.1 is updated; - Figure 2, Figure 15, Table 14 and Table B.3 are updated; - a new Figure 35 is added; - a new Table 10 is added; - Annex D is extended to cover additional communication profile families; - Annex F is extended to cover conductor sizes in electrical cables; - Annex H is made normative; - some common requirements are extended as result of the revision of the installation profiles. This publication is to be read in conjunction with the IEC 61784 series and ISO/IEC/TR 14763-2:2000.