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Functional Safety K*D0-RSH-1.1E.1, HiC5863(Y1)
Planning
3.4
Characteristic Safety Values
Parameters
Assessment type and documentation
Device type
Mode of operation
Safety function
HFT
SIL
SC
s
dd
1
du
total (safety function)
2
SFF
3
MTBF
MTTF
d
PTC
PFH
PFD
for T
= 5 years
avg
1
PFD
for T
= 10 years
avg
1
4
T
max.
1
Table 3.1
1
Only use the device in safety relevant applications with the following termination boards:
FC-GPCS-SDO08-PF
SC-GPCS-UNI16-PF
FC-GPCS-RIO16-PF
HiCTB32-TRI-DOISS-EL-PL-Y1
HiCTB16-TRI-DOISS-EL-PL-Y1
HiCTB16-TRX-RAC-PL-IO16
HiCTB16-YRS-RRB-AK-CC-DO16-Y1
HiCTB16-SDC-24C-SC-RA
HiCTB16-SCT-44C-SC-RA
Generally: Add 2.5 FIT to the overall failure rate for dangerous undetected failures.
Exception for HiCTB16-TRX-RAC-PL-IO16 Termination Board: Add 1.5 FIT to the overall failure rate for dangerous undetected
failures.
Recalculate the necessary safety relevant values for your safety evaluation. Contact Pepperl+Fuchs for information on using
other termination boards.
2
The SFF value was not calculated according to IEC/EN 61508-2.
3
acc. to SN29500. This value includes failures which are not part of the safety function/MTTR = 8 h.
4
If the device claims less than 10 % of the signal loop budget, T
The characteristic safety values like PFD, PFH, SFF, HFT and T
from the FMEDA report. Observe that PFD and T
The function of the devices has to be checked within the proof test interval (T
Characteristic values
Full assessment
A
Low demand mode or high demand mode
ETS
0
3
3
150 FIT
0 FIT
2.21 FIT
152 FIT
98.6 %
151 years
> 2500 years
100 %
-9
2.21 x 10
1/h
-5
4.84 x 10
-5
9.7 x 10
10 years
can be chosen higher.
1
are related to each other.
1
are taken
1
).
1
13
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