Assessment Of Functional Safety - Xb15 Dc; Assessment Of Functional Safety - Xb15 Ac - Eaton Xenon beacon XB15 Technische Anleitung

Xenon beacon XB15
English
The telephone initiate versions of the Beacon are not
included in this safety manual.
Under No fault (Normal) Operating conditions the XB15
Beacon will provide a spherical visual warning light when
required by the system.
Under fault conditions the failure mode of the Beacon is a
failure to provide a spherical visual warning light. For the
failure rate associated with this failure mode please refer
to the table below.
'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 = 730Hrs, 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
Assessment of functional safety – XB15 AC
This Beacon is intended for use in a safety system
conforming to the requirements of IEC61508. UL has
conducted a Failure Modes Effect and Diagnostic
6 6
Xenon beacon Xb15 TM250 Issue F October 2019 www.eaton.com
Safety function:
XB15 Xenon Beacon
Single Mode (1oo1)
HFT=0
62%
0.00E+00
DD
5.85E-06
DU
0.00E+00
SD
9.53E-06
SU
0.00%
2.18E-03
5.85E-06
[
Limited to: SIL 1 (1oo1) & SIL 2 (1oo2) due to SFF value.
Assessment of functional safety – XB15 DC
This Beacon is intended for use in a safety system
conforming to the requirements of IEC61508. Sira Test
& certification Ltd has conducted a Failure Modes Effect
and Diagnostic Analysis (FMEDA) of the DC version of
XB15 Xenon Beacon against the requirements of IEC
61508-2 using a Proof Test Interval of 730hrs.
The results are shown below and are based on Route 1H.
The Beacon is classed as a Type B device.
Xb15 Dc beacon
XB15 Xenon Beacon
Redundant Mode (1oo2)
HFT=1
62%
0.00E+00
5.85E-07
0.00E+00
9.53E-07
0.00%
2.18E-04
5.85E-07
Route 1
H
See report R56A24816B
SC2 (R56A24816B)
Analysis (FMEDA) of the XB15 Xenon Beacon against the
requirements of IEC 61508-2 using a Proof Test Interval of
8760hrs.
The results are shown below and are based on Route 1
The Beacon is classed as a Type B device.
Verdict
Type B
SIL 1
SIL 2 (1oo1)
SIL 1 (1oo1)
.
H