EN 61511-2 EUROPEANSTANDARD NORMEEUROPEENNE EUROPAISCHENORM April 2017 ICS13.110; 25.040.01 Supersedes EN 61511-2:2004 English Version Functionalsafety-Safetyinstrumentedsystemsfortheprocess industry sector - Part 2: Guidelines for the application of IEC 61511-1 (IEC61511-2:2016) Securite fonctionnelle - Systemes instrumentes de securite Funktionale Sicherheit - PLT-Sicherheitseinrichtungen fur pour le secteur des industries de transformation - Partie 2: die Prozessindustrie - Teil 2: Anleitungen zur Anwendung Lignes directives pour I'application de IIEC 61511-1 des Teils 1 (IEC 61511-2:2016) (IEC 61511-2:2016) This European Standard was approved by CENELEC on 2016-09-01. CENELEC members are bound to comply with the CEN/CENELEC Intemal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration Up-to-date lists and bibliographical references concerning such national standards may be obtainedonapplicationtothe CEN-CENELEC Management Centre or to any CENELEC member. This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CENELEC member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions. CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. CENELEC European Committeefor Electrotechnical Standardization ComiteEuropeendeNormalisationElectrotechnique Europaisches Komitee fur Elektrotechnische Normung CEN-CENELECManagementCentre:AvenueMarnix17,B-1000Brussels Ref.No.EN61511-2:2017E EN 61511-2:2017 Europeanforeword The text of document 65A/783/FDIS,future edition2ofIEC61511-2,prepared bySC 65A"System aspects"of IEC/TC 65“Industrial process measurement, controland automation"was submittedtothe IEC-CENELECparallelvoteandapprovedbyCENELECasEN61511-2:2017. The following dates are fixed: latest date bywhich thedocument has to be (dop) 2017-10-21 implemented at national level by publication of an identical national standard or by endorsement latestdateby which the national (dow) 2020-04-21 standards conflicting with the document have to be withdrawn ThisdocumentsupersedesEN61511-2:2004. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CENELEC [and/or CEN] shall not be held responsible for identifying any or all such patent rights. Endorsement notice The text of the International Standard IEC61511-2:2016was approved byCENELEC as a European Standard without any modification. In the official version, for Bibliography, the following notes have to be added for the standards indicated: IEC 60880:2006 NOTE Harmonized as EN 60880:2009. IEC 61025:2006 NOTE Harmonized as EN 61025:2007. IEC61078:2006 NOTE Harmonized as EN 61078:2006. IEC 61131-3:2013 NOTE Harmonized as EN 61131-3:2013. IEC 61165:2006 NOTE Harmonized as EN 61165:2006 IEC61508-1:2010 NOTE HarmonizedasEN61508-1:2010 IEC 61508-2:2010 NOTE Harmonized asEN 61508-2:2010. IEC61508-3:2010 NOTE HarmonizedasEN61508-3:2010. IEC61508-6:2010 NOTE Harmonized as EN 61508-6:2010. IEC 61508-6:2010 NOTE Harmonized as EN 61508-6:2010 IEC62061:2005 NOTE HarmonizedasEN62061:2005 IEC62502:2010 NOTE HarmonizedasEN62502:2010 IEC62551:2012 NOTE Harmonized as EN62551:2012 ISO9000:2015 NOTE Harmonized as EN ISO 9000:2015 2 EN 61511-2:2017 ISO 10418:2003 NOTE Harmonized as EN ISO 10418:2003. ISO/TR 12489:2013 NOTE Harmonized as CEN ISO/TR 12489:2016. ISO17776:2000 NOTE Harmonized as EN ISO 17776:2002. 3 EN61511-2:2017 Annex ZA (norm