Eaton XB15 - Page 11

7
Xenon beacon XB15
English
Safety function:
‘To provide a spherical cycled visual warning light when energized’.
XB15 AC Beacon
Summary of Clauses
2/7.4.2 and 2/7.4.4
XB15 Xenon Beacon
Single Mode (1oo1)
XB15 Xenon Beacon
Redundant Mode (1oo2)
Verdict
Architectural constraints
Safe Failure Fraction (SFF)
HFT=0 HFT=1 Type B
72% 72% SIL 1 (1oo1)
SIL 2 (1oo2)
Random hardware
failures: [h
-1
]
λ
DD
λ
DU
6.45E-09
3.48E-07
6.45E-10
3.48E-08
Random hardware
failures: [h
-1
]
λ
SD
λ
SU
0.00E+00
8.84E-07
0.00E+00
8.84E-08
Diagnostic coverage (DC) 0.00% 0.00%
PFD @ PTI = 8760Hrs, MTTR = 8 Hrs 1.53E-03 1.53E-04 SIL 2 (1oo1)
Average freq. of dangerous failure (high
demand-PFH)[h
-1
]
3.48E-07 3.48E-08 SIL 3 (1oo1)
Hardware safety integrity compliance Route 1
H
Systematic safety integrity compliance Route 1
S
Systematic Capability
(SC1, SC2, SC3, SC4)
SC2
Hardware safety integrity achieved Limited to: SIL 1 (1oo1) & SIL 2 (1oo2) due to SFF value.
XENON BEACON XB15 TM332 Issue A October 2018 www.eaton.com