Complex Architectures in the final element (I) Calculating the probability of failure (PFDavg) in a complex architecture is not usually easy, especially if we do not know the concepts well. Let's see in this case a complex architecture in the final element. Example: Logic 4oo4
Most used Architectures In the following table we show the most used architectures when designing Safety Instrumented Functions (SIF). Logic Channels1 HFT (S) HFT (A) Objetives Used for 1001 1 0 0 sensor, actuator 1002 2 1 0 More Safety sensor, actuator 2002
