Safety integrity level (SIL) verification per ISA84.01 and IEC61508requires that a probabilistic evaluation be done on the hardwareused in a safety instrumented function (SIF). Data necessary forthat ..
Safety integrity level (SIL) verification per ISA84.01 and IEC61508
requires that a probabilistic evaluation be done on the hardware
used in a safety instrumented function (SIF). Data necessary for
that evaluation included failure rates, failure mode percentages
and diagnostic coverage factors (if any). These data are needed for
each component in the SIF.
Those manufacturers who get products third-party certified per
IEC61508 are required to publish the data or provide some other
means to allow a potential user of the product to do the
probabilistic evaluations. One of the first manufacturers to get a
safety PLC approved to IEC61508 has created an SIL calculation tool
that us
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