Rockwell Automation Publication 1715-UM001J-EN-P - December 2020
275
Appendix D PFD and PFH Calculations for a SIL 2 System
De-energize-to-trip 20-year Mission Time
Energize-to-action 20-year Mission Time
1715-IF16
A
3.001
16-channel analog input module
6.44E-05
8.67E-05
8.37E-06
1.27E-05
1715-OB8DE
A
3.001
8-channel digital output module
2.68E-05
6.88E-05
5.36E-05
1.34E-05
1715-OF8I
A
3.001
8-channel analog output module
4.78E-05
1.48E-04
9.56E-05
2.99E-06
(1)
For the latest approved versions, see the Revision Release List available from the Product Certifications link at
Table 60 - PFD Calculations for 1715 I/O Components
Cat No.
Se
ries
Firmware
Version
(1)
Description
Simplex Configuration
Duplex Configuration
PFDde
PFDe
PFDde
PFDe
Table 61 - De-energize-to-trip (20-year Mission Time)
MTTR 24 Hours
20-year Mission Time
Simplex Configuration
Duplex Configuration
Cat
No.
Ser
ies
Firm
w
ar
e
Ve
rs
io
n
Descr
iption
MTBF
λ
s
λ
sd
λ
du
λ
dd
SFF
HFT
PFHde
PFD
de
ST
R
ß
ßd
tce'
tge
'
HFT
PFHde
PFD
de
Ar
ch
ST
R
1715-
AENTR
A
3.003
Ethernet
adapter
redundant
module
400
,5
40
1.4
8E
-06
6.
25
E-
07
1.25E-0
8
1.00E
-06
99
.5
%
N/
A
N/
A
N/
A
N/
A
1.0%
1.0%
6.9
1E+02
5.
84E+0
4
1
1.53E
-10
1.26E
-05
1oo
2D
1.70E
-08
1715-
IB16D
A
3.001
16-channel
digital
input
module
930,6
20
5.
76
E-
07
5.
75
E-
07
4.
97E
-10
4.
98E-0
7
99
.9
%
0
7.
36
E-
10
6.44E-0
5
1.07E
-06
1.0%
0.5%
6.46E+01
5.
84E+0
4
1
9.5
5E
-1
1
8.3
7E
-06
1oo
2D
1.08E
-08
1715-
IF16
A
3.001
16-channel
analog
input
module
930,6
20
5.
76
E-
07
5.
75
E-0
7
4.
97E
-10
4.
98E-0
7
99
.9
%
0
7.
36
E-
10
6.44E-0
5
1.07E
-06
1.0%
0.5%
6.46E+01
5.
84E+0
4
1
9.5
5E
-1
1
8.3
7E
-06
1oo
2D
1.08E
-08
1715-
OB8DE
A
3.001
8-channel
digital
output
module
79
7,
71
4
1.8
4E
-08
1.8
3E
-08
2.
99
E-
10
5.
86
E-
08
99
.6
%
1
2.
99
E-
10
2.
68
E-
05
1.25E-0
6
1.0%
1.0%
N/
A
N/
A
1
5.
98
E-
10
5.
36
E-
05
2o
o2
1.25E-0
8
1715-
OF8I
A
3.001
8- channel
analog
output
module
3,
007
,2
18
1.26E-0
7
1.1
2E
-07
5.
08E-10
3.
86E-0
9
99
.6
%
1
5.
08E-10
4.
78E
-05
3.
18E
-07
1.0%
0.5%
N/
A
N/
A
1
1.02E-09
9.5
6E
-05
2o
o2
3.
18E
-09
Table 62 - Energize-to-action (20-year Mission Time)
MTTR 24 Hours
20-year Mission Time
Simplex Configuration
Duplex Configuration
Ca
t No.
Se
ri
es
Firm
w
are
Ve
rs
io
n
Description
MTBF
λ
s
λ
sd
λ
du
λ
dd
SFF
HF
T
PFHe
PFDe
STR
ß
ßd
tce
'
tge'
HF
T
PFHe
PFDe
Arch
STR
1715-
AENTR
A
3.003
Ethernet
adapter
redundant
module
39
7,
16
5
1.39E
-06
5.
57E
-07
1.8
4E
-08
1.1
1E-06
99.4%
N/
A
N/
A
N/
A
N/
A
1.0
%
1.0
%
9.
76
E+
02
5.84
E+04
1
2.
43
E-
10
1.96
E-
05
1oo2
D
1.72E
-0
8
1715-
IB16D
A
3.001
16-channel
digital
input
module
89
1,078
5.
69E
-07
5.
68
E-
07
5.13
E-
09
5.
48
E-
07
99.9%
0
9.90E-10
8.
67E-05
1.12E
-06
1.0
%
0.
5%
4.
25E+02
5.84
E+04
1
1.4
7E
-1
0
1.2
7E
-0
5
1oo2
D
1.13E-08
1715-IF16 A
3.001
16-channel
analog
input
module
89
1,078
5.
69E
-07
5.
68
E-
07
5.13
E-
09
5.
48
E-
07
99.9%
0
9.90E-10
8.
67E-05
1.12E
-06
1.0%
0.
5%
4.
25E+02
5.84
E+04
1
1.4
7E
-10
1.27E
-05
1o
o2D
1.13E-08
1715-
OB8DE
A
3.001
8-channel
digital
output
module
37
3,
24
8
3.
56
E-
08
3.
51
E-
08
7.
23
E-
10
4.
87
E-
08
99.1%
1
7.
23
E-
10
6.
88E
-05
2.
66E
-0
6
1.0%
1.0%
N/
A
N/
A
1
1.30E-10
1.34E-0
5
1o
o2
5.
34
E-
06
1715-
OF8I
A
3.001
8-channel
analog
output
module
54
0,3
50
3.
15E
-07
3.
09
E-
07
1.65E
-09
8.
67E-08
99.6%
1
1.65E
-09
1.48E-04
1.83E-06
1.0%
0.
5%
N/
A
N/
A
1
3.
44
E-
11
2.99E
-06
1o
o2
3.
68
E-
06