IEC 61511-2 Ed. 1.0 b:2003

provides guidance on the specification, design, installation, operation and maintenance of Safety Instrumented Functions and related safety instrumented system as defined in IEC 61511-1. This standard has been organized so that each clause and subclause number herein addresses the same clause number in IEC 61511-1 (with the exception of the annexes). It has the status of a horizontal standard in accordance with IEC Guide 108.