Functional Safety HiC2853R1, HiC2853R4
Planning
20
22
-0
6
13
3.4
Characteristic Safety Values
HiC2853R1
Parameters
Characteristic values
Assessment type and documentation
Full assessment
Device type
A
Demand mode
Low demand mode or high demand mode
HFT
0
SIL
3
SC
3
Safety function
Signal transfer via electronic
output
Signal transfer via resistive
transistor output
s
186 FIT
145 FIT
dd
0 FIT
0 FIT
du
1.91 FIT
2.99 FIT
total (safety function)
188 FIT
148 FIT
total
437 FIT
437 FIT
SFF
98.9 %
97.9 %
MTBF
1
1
acc. to SN29500. This value includes failures which are not part of the safety function/MTTR = 8 h.
261 years
261 years
PFH
1.91 x 10
-9
1/h
2.99 x 10
-9
1/h
PFD
avg
for T
1
= 1 year
8.37 x 10
-6
1.31 x 10
-5
PFD
avg
for T
1
= 2 years
1.67 x 10
-5
2.62 x 10
-5
PFD
avg
for T
1
= 5 years
4.18 x 10
-5
6.65 x 10
-5
Fault reaction time
2
2
Time between fault detection and fault reaction
20 ms
Reaction time
3
3
Step response time
< 1 s
Table 3.1
