Specifications

Publication 1794-RM001F-EN-P - September 2011
A-8 Failure Estimates
1794-OF4IXT 4 Isolated Output Analog Module 5,493,902 1.82E-07 1.33E-09
1794-IJ2XT 2 Ch. Frequency Counter Module 11,714,128 8.54E-08 6.10E-10
1794-IRT8XT 8 TC/RTD Input Analog Module 8,204,792 1.22E-07 8.79E-10
(1)
MTBF measured in hours.
(2)
Calculated using field-based values for components
(3)
λ = Failure Rate = 1 / MTBF
Table A.5 MTBF Field Data and Per Module PFH Estimates - T
1
= 2 years
Catalog Number: Description:
(MTBF)
(1)
λ
(3)
Estimated
PFH 1oo2
Table A.6 MTBF Field Data and Per Module PFH Estimates - T
1
= 5 years
Catalog Number: Description:
(MTBF)
(1)
λ
(3)
Estimated
PFH 1oo2
1794-ACN15 ControlNet Single Media Adapter 8,223,684 1.22E-07 9.14E-10
1794-ACNR15 ControlNet Redundant Media Adapter 8,223,684 1.22E-07 9.14E-10
1794-AENT 10/100Mb Ethernet Communication Adapter 691,134 1.45E-06 1.91E-08
1794-IB10XOB6 10 Input/6 Output Module 4,943,442 2.02E-07 1.59E-09
1794-IB16 16 Sink Input Module 4,105,090 2.44E-07 1.96E-09
1794-IE8 Analog Input Module 37,952,679 2.63E-08 1.87E-10
1794-IF2XOF2I Isolated Analog Input/Output Module 25,296,960 3.95E-08 2.83E-10
1794-IF4I Isolated Analog Input Module 11,746,343 8.51E-08 6.27E-10
1794-IJ2 Frequency Counter Module 2,418,321 4.14E-07 3.62E-09
1794-IP4 Pulse Counter Module 2,375,360 4.21E-07 3.70E-09
1794-IR8 RTD Input Module 6,191,655 1.62E-07 1.24E-09
1794-IRT8 TC/RTD/mV Input Module 1,182,438 8.46E-07 8.97E-09
1794-IT8 Thermocouple Input Module 1,564,324 6.39E-07 6.22E-09
1794-OB16 16 Source Output Module 1,883,594 5.31E-07 4.92E-09
1794-OB16P Protected Output Module 2,135,280 4.68E-07 4.21E-09
1794-OB8EP Protected Output Module
2,389,669
(2)
4.18E-07 3.68E-09
1794-OE4 Analog Output Module 23,807,086 4.20E-08 3.02E-10
1794-OF4I Isolated Analog Output Module 7,191,128 1.39E-07 3.76E-10
1794-OW8 Relay Output Module 14,766,876 6.77E-08 4.94E-10
1794-TB3 Terminal Base Units
21,128,346
(2)
4.73E-08 3.41E-10
1794-TB3G Generic Terminal Base Units 27,320,800 3.66E-08 2.62E-10
1794-TB3GS Generic Terminal Base Units 46,425,600 2.15E-08 1.53E-10
1794-TB3S Terminal Base Unit
71,433,747
(2)
1.40E-08 9.88E-11
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