Rockwell Automation 1715-OF8I Redundant I/O System User Manual - Manual (Page 291)

Rockwell Automation Publication 1715-UM001C-EN-P - March 2014 291
PFD and PFH Calculations for a SIL 2 System Appendix E
PFD Calculations with 10-hour MTTR
The PFD calculations in Table 61 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 61 - 1-year PFD Calculations for 1715 I/O Components
Cat No.
61
508 20
00
(1)
Ser
ies
Firmware
Version (2)
Description
Simplex Configuration Duplex Configuration
PFDde PFDe PFDde PFDe
1715-AENTR x A 2.001 EtherNet adapter redundant module 1.21E-04 1.55E-04 4.65E-07 7.84E-07
1715-IB16D x A 2.001 16-channel digital input module 4.04E-06 6.31E-06 4.29E-07 4.48E-07
1715-IF16 x A 2.001 16-channel analog input module 4.04E-06 6.31E-01 4.29E-07 4.48E-07
1715-OB8DE x A 2.001 8-channel digital output module 1.52E-06 4.14E-05 3.03E-06 4.16E-07
1715-OF8I x A 2.001 8-channel analog output module 2.91E-06 1.53E-04 5.79E-06 3.62E-06
(1) Calculated MTBF and PFD by FMEA to 61508-2000.
(2) For the latest approved versions, see the Revision Release List available from the Product Certifications link at http://www.ab.com.
Table 62 - De-energize-to-trip 1-year Proof Test Interval
MTTR 10 Hours PTI 1.0 Years Simplex Configuration Duplex Configuration
Ca
t N
o.
Se
rie
s
Fi
rm
w
are
Ve
rs
io
n
De
scr
ip
tio
n
MT
BF
λs
λdu λd
d
SFF tc
e'
HFT
PFH
de
PFDde
ST
R
β βd tc
e'
tg
e'
HFT
PFH
de
PFDde
Arch ST
R
1715-
AENTR
A 2.001 EtherNet
adapter
dual
module 84
1,973
8.43
E-07
9.82
E-09
3.34
E-07
97
.74%
N/A N/A N/A N/A N/A 1.0% 1.0% 1.14
E+0
2
7.94
E+0
1
1 3.45
E-09
4.65
E-07
1oo2
D
8.43
E-08
1715-
IB16D
A 2.001 16-
channel
digital
input
module 3,53
5,79
1
2.06
E-07
6.57
E-10
7.60
E-08
99
.77%
4.76
E+0
1
0 7.48
E-10
4.04
E-06
2.82
E-07
1.0% 0.5% 2.03
E+0
1
1.68
E+0
1
1 4.77
E-10
4.29
E-07
1oo2
D
2.06
E-09
1715-
IF16
A 2.001 16-
channel
analog
input
module 3,53
5,791
2.06
E-07
6.57
E-10
7.60
E-08
99
.77%
4.76
E+0
1
0 7.48
E-10
4.04
E-06
2.82
E-07
1.0% 0.5% 2.03
E+0
1
1.68
E+0
1
1 4.77
E-10
4.29
E-07
1oo2
D
2.06
E-09
1715-
OB8DE
A 2.001 16-
channel
digital
output
module 9,67
7,085
7.94
E-08
2.96
E-10
2.36
E-08
99
.26%
6.42
E+0
1
1 7.66
E-10
1.52
E-06
1.03
E-07
1.0% 1.0% N/A N/A 1 1.53
E-09
3.03
E-06
2oo2 7.94
E-10
1715-
OF8I
A 2.001 16-
channel
analog
output
module 5,44
6,179
1.34
E-07
5.50
E-10
4.96
E-08
99.5
1%
5.80
E+0
1
1 8.90
E-10
2.91
E-06
1.83
E-07
1.0% 0.5% N/A N/A 1 1.78
E-09
5.79
E-06
2oo2 1.34
E-09