Rockwell Automation 1715-OF8I Redundant I/O System User Manual - Manual (Page 297)

Rockwell Automation Publication 1715-UM001C-EN-P - March 2014 297
PFD and PFH Calculations for a SIL 2 System Appendix E
PFD Calculations with 24-hour MTTR
The PFD calculations in Table 70 are calculated for a 1-year proof test interval
(8760 hours) and are specific to1715 I/O components in ControlLogix systems.
De-energize-to-trip 1-year Proof Test Interval
Table 70 - De-energize-to-trip 1-year Proof Test Interval
MTTR 24 Hours PTI 1.0 Years Simplex Configuration Duplex Configuration
Ca
t No
.
Seri
es
Fi
rm
w
are
Ve
rs
io
n
Descrip
tion
MT
BF
λs λd
u
λd
d
SF
F
tc
e'
HF
T
PFH
de
PFDde ST
R
β βd tc
e'
tg
e'
HF
T
PFH
de
PFDde Ar
ch
ST
R
1715-
AENTR
A 2.001 EtherNet
adapter
dual
module 841
,973
8.43
E-07
9.82
E-09
3.34
E-07
97.7
4%
N/A N/A N/A N/A N/A 1.0% 1.0% 1.28
E+02
9.34
E+01
1 3.45
E-09
5.13
E-07
1oo2D 8.43
E-08
1715-
IB16D
A 2.001 16-
channel
digital
input
module 3,535,7
91
2.06E-
07
6.57E-
10
7.60E-
08
99
.77%
6.16E+
01
0 7.48E-
10
5.12E-
06
2.82E-
07
1.0
%
0.5
%
3.43E+
01
3.08E+
01
1 4.77E-
10
4.36E-
07
1oo2D 2.06E-
09
1715-
IF16
A 2.001 16-
channel
analog
input
module 3,5
35,79
1
2.0
6E-07
6.5
7E-10
7.6
0E-08
99
.77%
6.16
E+
01
0 7.4
8E-10
5.1
2E-06
2.8
2E-07
1.0
%
0.5
%
3.43
E+
01
3.08
E+
01
1 4.7
7E-10
4.3
6E-07
1oo2
D
2.0
6E-09
1715-
OB8DE
A 2.001 16-
channel
digital
output
module 9,677
,085
7.94E
-08
2.96E
-10
2.36E
-08
99.26
%
7.82E
+01
1 7.66E
-10
1.85E
-06
1.03E
-07
1.0% 1.0% N/A N/A 1 1.53E
-09
3.69E
-06
2oo2 7.94E
-10
1715-
OF8I
A 2.001 16-
channel
analog
output
module 5,44
6,17
9
1.34
D-
07
5.50
E-
10
4.96
E-
08
99
.51%
7.20
E+
01
1 8.90
E-
10
3.61
E-
06
1.83
E-
07
1.0% 0.5% N/A N/A 1 1.78
E-
09
7.19
E-
06
2002 1.34
E-
09