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IEC 61508 and Functional Safety System Selection

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This paper provides an introduction to IEC 61508, describes an illustrative application example using the MOST SafetyNet System, and offers parameters that should be considered when choosing a safety instrumented system.

By Dil Wetherill, Measurement Technology Ltd. (MTL)

ESTABLISHING the suitability of a certified safety-related system to carry out a particular safety function can be simplified in to three basic tests: Is the system architecture suitable? Is the probability of a dangerous failure low enough? And can the system respond sufficiently quickly?

This paper provides an introduction to IEC 61508 Functional Safety Standard. It reviews the fundamentals of the standard and summarizes the essential parameters that should be considered when selecting and implementing a safety instrumented system based on this standard.

File Size: 147 KB
File Type: PDF

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