Calculations for verifying a Safety Instrumented Function (SIF) with Safety Integrity Level (SIL) performance requirement are standard in the process industry these days. You will find examples in both the IEC 61508 and IEC 61511 standards and Functional Safety (FS) training courses like those available ...

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When it comes to implementing safety instrumented systems (SIS) to comply with functional safety standard IEC 61511, the safety PLC is a pivotal system to specify. So, what are the key questions that you need to ask if choosing a new system supplier? Read more here.What is ...

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You may not know or care much about Hardware Fault Tolerance (HFT) unless you're working in a hazardous industry with Safety Integrity Level *SIL requirements. However, just like the multiple safety systems in your motor vehicle, systems used for protecting hazardous process plants are often built ...

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A SIF gets specified as an automated independent protection layer (IPL), often as the result of a safety integrity level (SIL) target-setting exercise, also known variously as a SIL determination, SIL study or SIL assessment.Like any many other safety engineering activities, designing a safety instrumented ...

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Are the terms "Mean Time Between Failures" (MTBF) and "Safety Integrity Level" (SIL) related to each other? Some would think not but read on if you'd like to discover if that's true.MTBFEquipment suppliers have been providing MTBF data for their electrical and electronic equipment for ...

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This blog will help if you have ever tried to do a SIL verification for probability of failure (PFD or PFH) of a safety function.  A safety integrity level - SIL verification - is needed for compliance with IEC 61511 / ISA 61511 in the ...

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