Chapter, Chapter chapter 1 1 1 1, Introduction – Rockwell Automation AADvance Controller PFH avg and PFD avg Data User Manual
Page 7
Document: 553847
(ICSTT-RM449_EN_P) Issue 04:
1-1
The information in this document has been compiled as part of the AADvance IEC
61508 certification, the failure modes and Failure Mode Effect and Diagnostic Analysis
(FMEDA) of each module having been inspected by TUV Rheinland.
The tables below provide PFD
avg
data for AADvance modules used in applications with
an 8 or 24 hour MTTR and with 6 months, 1 year, 5 years or 10 years Manual Test
Interval (MTI). If the AADvance system is to be used in an application with any other
MTTR or MTI, use the data from the next column with a higher MTTR or MTI than
that of the application.
If a de-energize to action system is configured to provide a shutdown on the first fault,
the MTTR has a negligible effect, hence, the tables in the PFD Data can be used for any
MTTR.
In This Chapter
In This Chapter
In This Chapter
In This Chapter
Failure Rates ......................................................................................................... 1-1
PFD Data - 8 Hour MTTR ................................................................................ 1-2
PFD Data - 24 Hour MTTR ............................................................................. 1-4
PFH Data............................................................................................................... 1-6
Safe Failure Fraction (SFF) and Hardware Fault Tolerance (HFT) .......... 1-8
System Configurations ....................................................................................... 1-9
Failure Rates
Failure Rates
Failure Rates
Failure Rates
The following failure rates apply to the AADvance modules:
Table 1:
Table 1:
Table 1:
Table 1:
AADvance Module Failure Rates
AADvance Module Failure Rates
AADvance Module Failure Rates
AADvance Module Failure Rates
Module
Module Description
MTBF
Years
FPMHλ
λ
λ
λ
T9110
Processor module
95
1.19
T9401
Digital input module, 24Vdc, 8 channel, isolated
93
1.22
T9402
Digital input module, 24Vdc, 16 channel, isolated
50
2.28
T9431
Analogue input module, 8 channel, isolated
93
1.22
T9432
Analogue input module, 16 channel, isolated
50
2.28
T9451
Digital output module, 24Vdc, 8 channel, isolated,
commoned
95
1.19
T9481
Analogue output module, 3 channel, isolated
110
1.04
T9482
Analogue output module, 8 channel, isolated
47
2.39
Chapter
Chapter
Chapter
Chapter 1
1
1
1
Introduction
Introduction
Introduction
Introduction