Rockwell Automation has compiled a free guide to functional safety for process applications, to assist with the IEC61511 standard, available at
http:// process/en/free-safety-guide.aspx.

Process Safebook contains real-life examples and explains how to manage safety in electrical, electronic and programmable electronic systems, providing guidance for engineers on how to integrate safety into a process system design from concept to decommissioning. Topics covered include: safety lifecycle; risk and risk reduction; the ALARP principle; determining SIL targets; risk graphs; layer of protection analysis (LOPA); allocation of safety functions; safety requirement specifi cation for the SIS; reliability techniques; SIL verifi cation; SIF probability of failure; and functional safety, assessment and auditing.