Eaton Xenon beacon XB15 Technische Anleitung Seite 11

'To provide a spherical cycled visual warning light when energized'.
Summary of Clauses
2/7.4.2 and 2/7.4.4
Architectural constraints
Safe Failure Fraction (SFF)
λ
Random hardware
λ
failures: [h ]
-1
λ
Random hardware
λ
failures: [h ]
-1
Diagnostic coverage (DC)
PFD @ PTI = 8760Hrs, MTTR = 8 Hrs
Average freq. of dangerous failure (high
demand-PFH)[h ]
-1
Hardware safety integrity compliance
Systematic safety integrity compliance
Systematic Capability
(SC1, SC2, SC3, SC4)
Hardware safety integrity achieved
Safety function:
XB15 Xenon Beacon
Single Mode (1oo1)
HFT=0
72%
6.45E-09
DD
3.48E-07
DU
0.00E+00
SD
8.84E-07
SU
0.00%
1.53E-03
3.48E-07
Limited to: SIL 1 (1oo1) & SIL 2 (1oo2) due to SFF value.
Xenon beacon Xb15 TM250 Issue F October 2019 www.eaton.com
Xb15 ac beacon
XB15 Xenon Beacon
Redundant Mode (1oo2)
HFT=1
72%
6.45E-10
3.48E-08
0.00E+00
8.84E-08
0.00%
1.53E-04
3.48E-08
Route 1
H
Route 1
S
SC2
Xenon beacon XB15
Verdict
Type B
SIL 1 (1oo1)
SIL 2 (1oo2)
SIL 2 (1oo1)
SIL 3 (1oo1)
English
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