Labom CI4 Series, Sil Instructions

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Transmitter PASCAL Ci4
Type series CI4xxx
LABOM Mess- und Regeltechnik GmbH Im Gewerbepark 13 27798 Hude Germany SA_001_2019-07_10.00
Hotline: +49 4408 804-444 Fax: +49 4408 804-100 e-mail: sales@labom.com www.labom.com Page 1/4
SIL Instructions
Safety-related parameters
Safety Integrity Level SIL2
Operating Modes Low and continuous demand mode
Achitecture 1oo1
Device Type B
Hardware Fault Tolerance HFT 0
Safe Failure Fraction SFF 95,29 %
Failure rate for safe detected failures

SD
1,81∙10
-7
1/h
Failure rate for safe undetected fail-
ures

SU
3,11∙10
-7
1/h
Failure rate for dangerous detected
failures

DD
3,42∙10
-7
1/h
Failure rate for dangerous undetected
failures

DU
4,13∙10 -8
1/h
Probability of a dangerous undetect-
ed failure per hour PFH
4,13∙10 -8
1/h
Mean time between failures =
Mean time to failure
MTBF
=
MTTF
130 a
Mean time to dangerous failure MTTF
d
2764 a
Inspection Interval T
1
1 year 2 years 3 years 5 years
Probability of a dangerous undetected
failure on demand PFD
1,84∙10
-4
3,64∙10
-4
5,45∙10
-4
9,06∙10
-4
for MTTR = MRT = 8 h