Safety engineering
Basic Safety − STO
Technical data
10
l
137
EDS700ACBA EN 5.1
Safety−related parameters acc.to IEC 61508−1 to −7 and IEC 62061
Specification Value Comment
Safety Integrity Level SIL 3
PFH [1/h] 7.79 E−10 0.78 % of SIL 3
PFD 6.82 E−5 6.8 % of SIL 3 after T = 20 years
Proof test interval 20 years Mission time
Safety−related parameters acc. to EN ISO 13849−1
Specification Value Comment
Performance Level e
Category 4
MTTF
d
high 71285 years
Diagnostic coverage DC high 99 %
Note on safety−related parameters
Source of failure rates SN 29500 As far as values from the
component manufacturers
were not available
Average max. ambient temperature 40 °C
General assumption that 50 % of the failures of
a component are hazardous failures
l
d
= 0.5 l, MTTFd = 2 MTTF As far as other information was
not available
To Next Page
Loading...
Need help?
General