An eFunctionalSafety blog about HFT – Hardware Fault Tolerance for Safety & Availability of SIS according to IEC 61511.

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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 decades. The base information usually comes from a field

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With a SIL verification probability of failure calculation for a safety function, how do you decide whether PFD or PFH applies? This technical blog article details what you need to consider.

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When it comes to deciding on using hard-wired logic or a Programmable Logic Controller (PLC) for a safety instrumented system logic solver design, there are some clear positive and negatives to each approach. So, how do you decide whether a programmable system is advisable or necessary given the possibility for cyber attack* in the internet-of-things era?Hard-wired

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The recently updated process sector safety instrumented system (SIS) standard IEC 61511 now requires that a “security risk assessment is carried out to identify security vulnerabilities of the SIS” [1]. But how should such an assessment be approached*, and what can you do to prepare for it?There have been well publicized examples of cyber-security breaches

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