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.

IEC 61000-6-7, Electromagnetic compatibility (EMC) – Part 6-7: Generic standards – Immunity requirements for equipment intended to perform functions in a safety related system (functional safety) in industrial locations

IEC 61508 (all parts), Functional safety of electrical/electronic/programmable electronic safety-related systems

IEC 61511 (all parts), Functional safety – Safety instrumented systems for the process industry sector

IEC 617843:2021, Industrial communication networks – Profiles – Part 3: Functional safety fieldbuses – General rules and profile definitions

IEC 62061, Safety of machinery – Functional safety of safety-related electrical, electronic and programmable electronic control systems

OPC 10000-1, OPC Unified Architecture – Part 1: Overview and Concepts

OPC 10000-2, OPC Unified Architecture – Part 2: Security

OPC 10000-3, OPC Unified Architecture – Part 3: Address Space Model

OPC 10000-4, OPC Unified Architecture – Part 4: Services

OPC 10000-5, OPC Unified Architecture – Part 5: Information Model

OPC 10000-6, OPC Unified Architecture – Part 6: Mappings

OPC 10000-7, OPC Unified Architecture – Part 7: Profiles

OPC 10000-8, OPC Unified Architecture – Part 8: Data Access

OPC 10000-14, OPC Unified Architecture – Part 14: PubSub

ISO/IEC 9834-8, Information technology — Procedures for the operation of object identifier registration authorities — Part 8: Generation of universally unique identifiers (UUIDs) and their use in object identifiers

ISO 13849-1, Safety of machinery – Safety-related parts of control systems – Part 1: General principles for design

ISO 13849-2, Safety of machinery – Safety-related parts of control systems – Part 2: Validation