PFH - Probability of dangerous failure per hour
Functional Safety and IEC 61508
Systems comprised of electrical and/or electronic elements have been used for many years to perform safety functions in most application sectors. Computer-based systems (generically referred to as programmable electronic systems) are being used in all application sectors to perform non-safety functions and, increasingly, to perform safety functions.
E.g.: Functional Safety PFH vs PFD
(broken link removed)
Functional Safety and IEC 61508
Systems comprised of electrical and/or electronic elements have been used for many years to perform safety functions in most application sectors. Computer-based systems (generically referred to as programmable electronic systems) are being used in all application sectors to perform non-safety functions and, increasingly, to perform safety functions.
E.g.: Functional Safety PFH vs PFD
(broken link removed)
