本国际标准规定了设计、分析和鉴定的要求 用于确保冗余安全系统电气独立性的隔离装置 IEC 60709中规定的电路，或安全电路和低等级电路之间的电路。这个标准 包括关于确定应用于设备的最大可信故障的指南 隔离装置。最大可信故障可作为所用测试水平的基础 在基于其他标准（如IEC TS 61000-6-5或IEC 62003）的测试中。本标准不涉及因功能相互依赖而产生的安全或共因失效问题 以及可能因信号交换或共享而产生的干扰或共因失效 系统或子系统。它也没有解决与以下方面有关的设计或鉴定问题: 隔离装置中的数字或可编程逻辑。用于包含数字或数字信号的隔离装置 必须考虑可编程逻辑、附加设计和鉴定要求； 这些要求不在本标准的范围内。交叉引用:IEC 60709IEC TS 61000-6-5IEC 61513IEC 62003IEC 60780IEC 60880IEC 61226:2009IEC 61508-1IEC 61508-2IEC 61508-3IEC 61508-4IEC 62138IAEA GS-R-3:2006IAEA GS-G-3.1:2006IAEA GS-G-3.5:2009IAEA SSR-2/1:2012IAEA NS-G-1.3:2002IAEA安全术语表:2007购买本文件时可提供的所有当前修订内容。

This International Standard establishes requirements for the design, analysis and qualification of isolation devices used to ensure electrical independence of redundant safety system circuits, or between safety and lower class circuits, as specified in IEC 60709. This standard includes guidance on the determination of the maximum credible fault that is applied to the isolation devices. The maximum credible fault can be used as a basis for the test levels used in testing based on other standards (e.g. IEC TS 61000-6-5 or IEC 62003).This standard does not address safety or CCF issues due to functional inter-dependencies and possible interferences or CCFs that may result from signal exchange or sharing between systems or sub-systems. It also does not address design or qualification issues related to digital or programmable logic in isolation devices. For isolation devices containing digital or programmable logic, additional design and qualification requirements must be considered; these requirements are outside the scope of this standard.Cross References:IEC 60709IEC TS 61000-6-5IEC 61513IEC 62003IEC 60780IEC 60880IEC 61226:2009IEC 61508-1IEC 61508-2IEC 61508-3IEC 61508-4IEC 62138IAEA GS-R-3:2006IAEA GS-G-3.1:2006IAEA GS-G-3.5:2009IAEA SSR-2/1:2012IAEA NS-G-1.3:2002IAEA Safety Glossary:2007All current amendments available at time of purchase are included with the purchase of this document.