prSSH EN IEC 61800-5-3:2024

Adjustable speed electrical power drive systems - Part 5-3: Safety requirements - Functional, electrical and environmental requirements for encoders

Scope

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 <em>encoder</em> (<em>Encoder(SR)</em>) in terms of their <em>functional safety</em> considerations, electrical safety and environmental conditions. It applies to <em>Encoder(SR)</em>, being sensors as part of a <em>PDS(SR)</em>. This document can also be referred to and used for <em>Encoder(SR)</em> in any other safety-related application, for example safety-related position monitoring.

This document is applicable where <em>functional safety</em> of an <em>encoder</em> is claimed and the <em>Encoder(SR) </em>is operating mainly in the high demand or continuous mode. The requirements of IEC 61800-5-2:2016 for <em>PDS(SR)</em> apply to <em>Encoder(SR)</em> as applicable.

This document includes additional or different requirements for <em>Encoder(SR)</em>. It sets out safety-related considerations of <em>Encoder(SR) </em>in terms of the framework of IEC 61508 (all parts), and introduces requirements for <em>Encoder(SR) </em>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 <em>Encoder(SR) </em>in relation to the safety performance of <em>safety sub-function</em>(s) of an <em>Encoder(SR)</em>.