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SIL claim limit considerations

It is important to oonsider the following when examining the relationship of the SIL claim limit of a device used to implement an SIF and the SIL of the SIF. [Pg.194]

With proper installation and maintenance, the common mode failure for the PE hardware should be quite low. The PE software systematic errors are also mitigated through manufacturers following the design requirements of IEC 61508-3 [Pg.194]

For LVL devices in demand-mode SIFs, redundancy and diagnostics alone are not sufficient to achieve higher SIL claim limits. LVL devices are significantly more complex, using embedded, utility, and multifunctional application software (e.g., logic solvers). For example, the following could be considered  [Pg.194]

No reproduction or networking permitted without license from IHS [Pg.194]


See other pages where SIL claim limit considerations is mentioned: [Pg.175]    [Pg.194]   


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Claims

Claims, limitation

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