可调速电力驱动系统 第 5-3 部分：安全要求 编码器的功能、电气和环境要求

[中文适用范围]： 本IEC 61800标准的一部分（产品标准）规定了安全相关编码器（Encoder(SR)）的设计、开发、集成和验证的要求和建议，涉及功能安全、电气安全和环境条件方面。它适用于作为PDS(SR)一部分的传感器编码器。本文件也可用于任何安全相关应用（例如安全相关位置监控）中的Encoder(SR)。当编码器的功能安全性被主张，且Encoder(SR)主要在高需求或连续模式下运行时适用。本文件不包括：无安全相关性的编码器功能特性；特定应用的危险和风险分析；该应用安全子功能的识别；初始分配给这些安全子功能的SIL；被驱动设备（接口安排除外）；二次危害（例如来自生产过程失效的）；Encoder(SR)制造过程；信号和命令对Encoder(SR)的有效性；安全方面（例如网络安全或访问安全）。本文件适用于实现安全子功能且SIL不大于SIL 3的Encoder(SR)。 [外文原描述]： IEC 61800-5-3:2021, which is a product standard, specifies requirements and makes recommendations for the design and development, integration and validation of safety-related encoder (Encoder(SR)) in terms of their functional safety considerations, electrical safety and environmental conditions. It applies to Encoder(SR), being sensors as part of a PDS(SR). This document can also be referred to and used for Encoder(SR) in any other safety-related application, for example safety-related position monitoring. This document is applicable where functional safety of an encoder is claimed and the Encoder(SR) is operating mainly in the high demand or continuous mode. The requirements of IEC 61800-5-2:2016 for PDS(SR) apply to Encoder(SR) as applicable. This document includes additional or different requirements for Encoder(SR). It sets out safety-related considerations of Encoder(SR) in terms of the framework of IEC 61508 (all parts), and introduces requirements for Encoder(SR) as subsystems of a safety-related system. It is intended to facilitate the realisation of the electrical/electronic/programmable electronic (E/E/PE) and mechanical parts of an Encoder(SR) in relation to the safety performance of safety sub-function(s) of an Encoder(SR).