7.0. Safety Instrumentation
Safety instrumentation systems form an important part of the book. In the following discussions a glimpse of these systems has been presented so that reader can get some idea about the same while going through the details in subsequent chapters. After IEC 61508/61511 came into effect, it has been found that there are two schools of thought. One group advocates for separation between BPCS and SIS. The other group does not find it wrong to combine BPCS with safety as long as it follows standards IEC 61508/61511with appropriate SIL. In reality, it is not the question of finding wrong or right but to judge the situation. This purely depends on how the stipulations in standard have been interpreted and implemented. It is ...
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