Sil Declaration Of Conformity - Eaton ZEB XTOE Handbuch

10/13 MN03402007Z-DE/EN
Safety Integrity Level
Safety Integrity Assessment
Hardware Fault Tolerance
Failure rate for detected safe failures
Failure rate for undetected safe failures
Failure rate for detected dangerous failures
Failure rate for undetected dangerous failures
Safe Failure Fraction
Diagnostic Coverage
Mean Time Before Failure
Average probability of failure on demand
Architecture
T1 Value
Lifetime
Proof Test Interval
Systematic capacibility
Failure Mode Definitions
1) Safe Detected: The overload relay software detects and change the contactor state for the random
hardware failures not impacting safety function performance.
2) Safe Undetected: The overload relay software may not detect the random hardware failures which
do not impact the safety function performance.
3) Dangerous Detected: The overload relay software detects and changes the contactor state for the
random hardware failure impacting safety function performance.
4) Dangerous Undetected: The overload relay software may not detect the random hardware failures
which may impact safety function performance.

SIL Declaration of Conformity

Values in the safety and commissioning instructions for
70 °C ambient temperature.
Safety data for software revision no. 1.00.013.
Symbol
SIL
HFT
1)
l
SD
2)
l
SU
3)
l
DD
4)
l
DU
SFF
DC
MTBF
PFD
AVG
SC
Safety Figures
Value
1
Hardware Safety Integrity
Compliance as per route 1H
Software Safety Integrity
Compliance as per route 2s.
0
-9
137 x 10 1/h
-9
2080 x 10 1/h
-9
134 x 10 1/h
-9
876 x 10 1/h
73 %
13.25 %
309 885 h
-3
3.85 x 10
1001
DIN EN 60079-17, Section 4.4
20 years
1 year
2
45