Safety Application Requirements

Safety application requirements include evaluating the following:

Probability of failure rates (PFD and PFH)
System reaction time
Functional verification tests that fulfill appropriate safety-level criteria

Creating, recording, and verifying the safety signature is also a required part of the safety application development process. The safety controller creates the safety signatures. The safety signature consists of an identification number, date, and time that uniquely identifies the safety portion of a project. This number includes all safety logic, data, and safety I/O configuration.

For safety system requirements, including information on the safety network number (SNN), verifying the safety signature, functional verification test intervals, system reaction time, and PFD/PFH calculations, see the GuardLogix 5580 and Compact GuardLogix 5380 Controllers Safety Reference Manual, publication 1756-RM012.

You must read, understand, and fulfill the requirements that are described in this publication before you operate a safety system that uses PointMax I/O safety modules.