MEDC DB1PUL Technical Manual page 7

To provide a pre-described audible warning sound when required'
Summary of Clauses
2/7.4.2 and 2/7.4.4
Architectural constraints
Safe Failure Fraction (SFF)
Random hardware
-1
failures: [h ]
Random hardware
-1
failures: [h ]
PFD @ PTI = 8760Hrs
MTTR = 8 Hrs
Average freq. of dangerous failure (high
-1
demand-PFH)[h ]
Hardware safety integrity
compliance
Systematic safety integrity
compliance
Systematic Capability
(SC1, SC2, SC3, SC4)
Hardware safety integrity achieved
© Eaton MEDC Ltd 2017
DB1H SOUNDER
Safety Function of DB1H Sounder:
DB1H Sounder
Single Mode (1oo1)
HFT=0
65%
6.45E+09
!
DD
8.87E-08
!
DU
0.00E+00
!
SD
!
1.59E-07
SU
3.89E-04
8.86E-08
Limited to: SIL 1 (1oo1) & SIL 2 (1oo2) due to SFF value.
DB1H Sounder
Redundant Mode (1oo2)
HFT=1
65%
6.45E+10
8.87E-09
0.00E+00
1.59E-08
3.89E-05
8.86E-09
Route 1
H
Route 1
s
SC2
Verdict
Type B
SIL 1(1oo1)
SIL 2 (1oo2)
SIL 3(1oo1)
SIL 3(1oo1)
07/17