It’s All About PFDavg!

[@grosvinhdz6574]

Thanks for sharing, I have learn more with this webinar than from my professor in this class.

[@RaidenMao]

Thank you for sharing!!! 1 question, if the supplier use the IEC 61508 certificated safety instrument/product (let's say SIL 3 certificated) to fulfill the safety requirement of a METRO RAILWAY project, should this instrument/product be claimed to also comply with the EN 50126, 8, 9 even without the proper certificate process according to the 5012X series?

[@lazarusphillipus677]

Proof test interval is set to be 6 months. No self-diagnostics for any of the subsystems (DC = 0). Given the dangerous failure rates for the different subsystems. Sensor: DU = 0.1 per year Logic solver: DU = 0.0001 per year Actuator: DU = 0.01 per year - Calculate the overall PFD_average for the SIS. (4 marks) - What is its SIL? (2 marks) - What would be the SIL if you use 1oo1 for all subsystems? (3 marks) Anyone to help me out with these questions