BS EN 61508-3:2010a）仅在彻底了解IEC 61508-1和 IEC 61508-2；b） 适用于构成安全相关系统一部分或用于开发 IEC 61508-1和IEC 61508-2范围内的安全相关系统。这样的软件是 被称为安全相关软件（包括操作系统、系统软件和 通信网络、人机界面功能、固件以及 应用软件）；c） 提供适用于用于开发和配置应用程序的支持工具的特定要求 IEC 61508-1和IEC 61508-2范围内的安全相关系统；d） 要求软件安全功能和软件系统能力 明确规定；注1:如果这项工作已作为E/E/PE安全相关系统规范的一部分完成（见附录7.2） IEC 61508-2），则无需在本部分中重复。 注2:规定软件安全功能和软件系统能力是一个迭代过程；看见 图3和图6。注3:文件结构见IEC 61508-1第5条和附录A。文件结构 可考虑公司程序和特定应用部门的工作实践。注4:术语“系统能力”的定义见IEC 61508-4的3.5.9。e） 确定应适用的安全生命周期阶段和活动的要求 在设计和开发安全相关软件（软件安全 生命周期模型）。这些要求包括措施和技术的应用， 根据所需的系统能力进行分级，以避免 控制软件中的故障和故障；f） 提供与系统安全的软件方面相关的信息要求 向执行E/E/PE系统集成的组织进行验证；g） 提供有关以下方面的信息和程序的准备要求: 用户操作和维护E/E/PE安全所需的软件 系统h） 提供对安全相关文件进行修改的组织应满足的要求 软件i） 与IEC 61508-1和IEC 61508-2一起提供支持要求 开发和设计工具、语言翻译、测试和调试等工具 工具、配置管理工具；注4:图5显示了IEC 61508-2和IEC 61508-3之间的关系。j） 不适用于符合IEC 60601系列的医疗设备。1.2 IEC 61508-1、IEC 61598-2、IEC 61508-3和IEC 61508-4是基本安全出版物， 尽管这种状态不适用于低复杂性E/E/PE安全环境- 相关的 系统（见IEC 61508-4的3.4.3）。作为基本安全出版物，它们旨在供 技术委员会根据原则制定标准 包含在IEC指南104和ISO/IEC指南51中。IEC 61508-1、IEC 61508-2、IEC 61508-3 IEC 61508-4也可作为独立出版物使用。本国际标准的水平安全功能不适用于符合 IEC 60601系列。1.3技术委员会的职责之一是，在适用的情况下 在编制出版物时使用基本安全出版物。在这种情况下 本基本安全出版物的要求、试验方法或试验条件不适用 除非这些技术人员编制的出版物中特别提及或包含 委员会。1.4图1显示了IEC 61508系列的总体框架，并指出了 IEC 61508-3在实现E/E/PE安全相关系统的功能安全方面发挥了重要作用。交叉引用:IEC 61508-1:2010IEC 61508-2:2010IEC 61508-4:2010IEC指南104:1997ISO/IEC指南51:1999EN 61508-1:2010EN 61508-2:2010EN 61508-4:2010IEC 61511IEC 62061IEC 61800-5-2IEC 61508-5:2010IEC 61508-6:2010IEC 61508-7:2010IEC 60601IEC 61131-3EN 61511EN 62061800-5-2EN 61508-5-5-5:2010EN 6150EN 61508EN 61508-7:2010EN 61061EN 61806-61800-5-6-6-6-6-6-6:2010EN 615066作为LSO套件的一部分提供。购买本文件时可获得的所有当前修订均包含在购买本文件中。

BS EN 61508-3:2010a) is intended to be utilized only after a thorough understanding of IEC 61508-1 and IEC 61508-2;b) applies to any software forming part of a safety-related system or used to develop a safety-related system within the scope of IEC 61508-1 and IEC 61508-2. Such software is termed safety-related software (including operating systems, system software, software in communication networks, human-computer interface functions, and firmware as well as application software);c) provides specific requirements applicable to support tools used to develop and configure a safety-related system within the scope of IEC 61508-1 and IEC 61508-2;d) requires that the software safety functions and software systematic capability are specified;NOTE 1 If this has already been done as part of the specification of the E/E/PE safety-related systems (see 7.2 of IEC 61508-2), then it does not have to be repeated in this part.NOTE 2 Specifying the software safety functions and software systematic capability is an iterative procedure; see Figures 3 and 6.NOTE 3 See Clause 5 and Annex A of IEC 61508-1 for documentation structure. The documentation structure may take account of company procedures, and of the working practices of specific application sectors.NOTE 4 Note: See 3.5.9 of IEC 61508-4 for definition of the term "systematic capability".e) establishes requirements for safety lifecycle phases and activities which shall be applied during the design and development of the safety-related software (the software safety lifecycle model). These requirements include the application of measures and techniques, which are graded against the required systematic capability, for the avoidance of and control of faults and failures in the software;f) provides requirements for information relating to the software aspects of system safety validation to be passed to the organisation carrying out the E/E/PE system integration;g) provides requirements for the preparation of information and procedures concerning software needed by the user for the operation and maintenance of the E/E/PE safetyrelated system;h) provides requirements to be met by the organisation carrying out modifications to safetyrelated software;i) provides, in conjunction with IEC 61508-1 and IEC 61508-2, requirements for support tools such as development and design tools, language translators, testing and debugging tools, configuration management tools;NOTE 4 Figure 5 shows the relationship between IEC 61508-2 and IEC 61508-3.j) Does not apply for medical equipment in compliance with the IEC 60601 series.1.2 IEC 61508-1, IEC 61598-2, IEC 61508-3 and IEC 61508-4 are basic safety publications, although this status does not apply in the context of low complexity E/E/PE safety-related systems (see 3.4.3 of IEC 61508-4). As basic safety publications, they are intended for use by technical committees in the preparation of standards in accordance with the principles contained in IEC Guide 104 and ISO/IEC Guide 51. IEC 61508-1, IEC 61508-2, IEC 61508-3 and IEC 61508-4 are also intended for use as stand-alone publications. The horizontal safety function of this international standard does not apply to medical equipment in compliance with the IEC 60601 series.1.3 One of the responsibilities of a technical committee is, wherever applicable, to make use of basic safety publications in the preparation of its publications. In this context, the requirements, test methods or test conditions of this basic safety publication will not apply unless specifically referred to or included in the publications prepared by those technical committees.1.4 Figure 1 shows the overall framework of the IEC 61508 series and indicates the role that IEC 61508-3 plays in the achievement of functional safety for E/E/PE safety-related systems.Cross References:IEC 61508-1:2010IEC 61508-2:2010IEC 61508-4:2010IEC Guide 104:1997ISO/IEC Guide 51:1999EN 61508-1:2010EN 61508-2:2010EN 61508-4:2010IEC 61511IEC 62061IEC 61800-5-2IEC 61508-5:2010IEC 61508-6:2010IEC 61508-7:2010IEC 60601IEC 61131-3EN 61511EN 62061EN 61800-5-2EN 61508-5:2010EN 61508-6:2010EN 61508-7:201060601EN 61131-3Also available as part of KIT 66.All current amendments available at time of purchase are included with the purchase of this document.