Rockwell Automation Publication 1756-RM012B-EN-P - April 2018 95
Appendix E
GuardLogix Systems Safety Data
The following examples show probability of a dangerous failure on demand
(PFD) and probability of dangerous failure per hour (PFH) values for
GuardLogix 1oo1 SIL 2 system or 1oo2 SIL 3 system.
For safety data that includes PFD and PFH values for safety I/O modules, see
the manuals for those devices. For more information, see Additional Resources
on page 8.
Useful Life
The useful life of GuardLogix controllers is 20 years.
Safety Data
For I/O devices safety data, including PFD and PFH values, see the manuals
for those products.
Data for Rockwell Automation machine safety products is now available in the
form of a library file to be used with the Safety Integrity Software Tool for the
Evaluation of Machine Applications (SISTEMA).
The library file is available for download at: http://
www.marketing.rockwellautomation.com/safety-solutions/ en/
MachineSafety/ToolsAndDownloads/sistema_download.
Topic Page
Useful Life 95
Safety Data 95
Product Failure Rates 96
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