User Documentation

Technical safety values
14 1373930000/02/06-2017
6.2 Safety data
Safety basic data
Safety category SIL3
Safety standard DIN EN 61508
Device type A
HFT 2
T
proof
in years 12
Safety parameters “low demand mode”
Frequency of demands 5 per year
Part of architecture 1oo1 1oo3
PFD
avg
1.31
⋅
10
-6
1.75
⋅
10
-6
λ
DD
in FIT 0.00 0.00
λ
DU
in FIT 0.03 1.00
λ
SD
+ λ
SU
in FIT 188.97 1.00
λ
Total
in FIT 189.00 2.00
SFF in % 99.98 50.00
PFD
avg
(complete) 3.07
⋅
10
-6
Safety parameters “high demand mode”
Frequency of demands Once per month Once per week Once per day
Part of architecture 1oo1 1oo3 1oo1 1oo3 1oo1 1oo3
PFH in h
-1
3.33
⋅
10
-11
3.43
⋅
10
-11
3.33
⋅
10
-11
1.48
⋅
10
-10
3.33
⋅
10
-11
1.05
⋅
10
-9
λ
DD
in FIT 0.00 0.00 0.00 0.00 0.00 0.00
λ
DU
in FIT 0.03 0.69 0.03 2.97 0.03 21.00
λ
SD
+ λ
SU
in FIT 188.97 0.69 188.97 2.97 188.97 21.00
λ
Total
in FIT 189.00 1.38 189.00 5.94 189.00 42.00
SFF in % 99.98 50.00 99.98 50.00 99.98 50.00
PFH in h
-1
(complete) 6.76
⋅
10
-11
1.82
⋅
10
-10
1.08
⋅
10
-9