EN IEC 62541-18 EUROPEANSTANDARD NORMEEUROPEENNE EUROPAISCHENORM October2025 ICS25.040 English Version OPC unified architecture - Part 18: Role-Based Security (IEC 62541-18:2025) Architecture unifiee OPC - Partie 18: Sécurite fondee sur OPC Unified Architecture - Teil 18: Rollenbasierte IT- les roles Sicherheit (IEC 62541-18:2025) (IEC 62541-18:2025) This European Standard was approved by CENELEC on 2025-09-19. CENELEC members are bound to comply with the CEN/CENELEC Internal 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 obtained on application to the CEN-CENELEC Management Centre orto any CENELEC member. This European Standard exists in three official versions (English, French, German). A version in any other language made by translation same status as the official versions. Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkiye and the United Kingdom. CENELEC EuropeanCommitteeforElectrotechnical Standardization Comité Européen de Normalisation Electrotechnique Europaisches Komitee fuir Elektrotechnische Normung CEN-CENELEC Management Centre: Rue de la Science 23,B-1040 Brussels Ref.No.EN IEC 62541-18:2025 E ENIEC 62541-18:2025 (E) Europeanforeword The text of document 65E/1043/CDV, future edition 1 of IEC 62541-18, prepared by SC 65E"Devices and integration in enterprise systems" of IEC/TC 65 "Industrial-process measurement, control and automation"was submitted to the IEC-CENELEC parallel vote and approved by CENELEC as ENIEC62541-18:2025. The following dates are fixed: (dop) 2026-10-31 latest date by which the national standards conflictingwiththe(dow)2028-10-31 document have to be withdrawn Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CENELEC shall not be held responsible for identifying any or all such patent rights. Any feedback and questions on this document should be directed to the users'national committee. A complete listing of thesebodies can be found on the CENELEC website. Endorsement notice Standard without any modification. In the official version, for Bibliography, the following note has to be added for the standard indicated: IEC62541-5:2020 NOTEApproved as EN IEC 62541-5:2020 (not modified) 2 ENIEC62541-18:2025(E) Annex ZA (normative) Normativereferencestointernational publications withtheircorrespondingEuropeanpublications The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. NOTE 1 Where an International Publication has been modified by common modifications, indicated by (mod), the relevant EN/HD applies. NOTE 2 Up-to-date information on the latest versions of the European Standards listed in this annex is available here: www.cencenelec.eu Publication Year Title EN/HD Year IEC 62541-11 OPC unified architecture-Part 1:Overview EN IEC 62541-12 andconcepts IEC 62541-3 OPC Unified Architecture -Part 3: AddressEN IEC 62541-3 Space Model IEC 62541-4 OPC Unified Architecture -Part4:Services ENIEC 62541-4 IEC 62541-5 OPC Unified Architecture -Part 5: ENIEC 62541-5 Information Model OPC Unified Architecture - Part 6: IEC 62541-6 ENIEC 62541-6 Mappings IEC 62541-8 OPC Unified Architecture - Part 8: Data ENIEC62541-8 Access IEC 62541-12 OPC unified architecture - Part 12: EN IEC 62541-12 Discovery and global services 1 Under preparation. Stage at the time of publication: IEC/DIS 62541-1:2024. 2 Under preparation. Sta