Rockwell Automation 1715-OF8I Redundant I/O System User Manual - Manual (Page 293)

Rockwell Automation Publication 1715-UM001C-EN-P - March 2014 293
PFD and PFH Calculations for a SIL 2 System Appendix E
The PFD calculations in Table 64 are calculated for a 2-year proof test interval
(17,520 hours) and are specific to1715 I/O components in ControlLogix
systems.
De-energize-to-trip 2-year Proof Test Interval
Table 64 - 2-year PFD Calculations for 1715 I/O Components
Cat No.
6150
8 200
0
(1)
Se
rie
s
Firmware
Version (2)
Description
Simplex Configuration Duplex Configuration
PFDde PFDe PFDde PFDe
1715-AENTR x A 2.001 EtherNet adapter redundant module 2.39E-04 3.04E-04 8.96E-07 1.52E-06
1715-IB16D x A 2.001 16-channel digital input module 7.32E-06 1.12E-05 8.53E-07 8.88E-07
1715-IF16 x A 2.001 16-channel analog input module 7.32E-06 1.12E-05 8.53E-07 8.88E-07
1715-OB8DE x A 2.001 8-channel digital output module 2.80E-06 7.92E-05 5.59E-06 8.00E-07
1715-OF8I x A 2.001 8-channel analog output module 5.32E-06 3.00E-04 1.06E-05 6.88E-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 65 - De-energize-to-trip 2-year Proof Test Interval
MTTR 10 Hours PTI 2.0 Years Simplex Configuration Duplex Configuration
Ca
t N
o.
Ser
ies
Fi
rm
w
are
Ve
rs
io
n
Descrip
tion
MT
BF
λs λd
u
λd
d
SF
F
tce
'
HF
T
PFH
de
PFDde
STR
β βd tce
'
tg
e'
HF
T
PFH
de
PFDde
Ar
ch
STR
1715-
AENTR
A 2.001 EtherNet
adapter
dual
module 841
,973
8.43E
-07
9.82E
-09
3.34E
-07
97.74
%
N/A N/A N/A N/A N/A 1.0% 1.0% 2.18E
+02
1.49E
+02
1 3.46E
-09
8.96E
-07
1oo2D 8.43E
-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%
8.51
E+
01
0 7.48
E-
10
7.32
E-
06
2.82
E-
07
1.0% 0.5% 3.05
E+
01
2.37
E+
01
1 4.77
E-
10
8.53
E-
07
1oo2D 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%
8.51
E+0
1
0 7.48
E-10
7.32
E-06
2.82
E-07
1.0% 0.5% 3.05
E+0
1
2.37
E+0
1
1 4.77
E-10
8.53
E-07
1oo2
D
2.06
E-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
%
1.18E
+02
1 7.67E
-10
2.80E
-06
1.03E
-07
1.0% 1.0% N/A N/A 1 1.53E
-09
5.59E
-06
2oo2 7.94E
-10
1715-
OF8I
A 2.001 16-
channel
analog
output
module 5,4
46,17
9
1.34
E-
07
5.50
E-
10
4.96
E-
08
99
.51%
1.06
E+
02
1 8.96
E-
10
5.32
E-
06
1.83
E-
07
1.0% 0.5% N/A N/A 1 1.79
E-
09
1.06
E-
05
2oo2 1.34
E-
09