If you have been working in the field of Industrial Control Systems cyber security (ICS security) or in the broader Operational Technology cybersecurity domain (OT security) then you may have heard of the standard ANSI/ISA/IEC 62443, referred to these days as simply IEC 62443. This standard has certain Foundational Requirements that are important and these are explained in short here. This short guide will explain these IEC 62443 Foundational …
What is a Safety Requirement Specification? (SRS for short)? A Safety Requirement Specification is one of the most important documents in any Safety Instrumented Systems project. This document forms the design basis of the Safety Instrumented System and has the detailed specifications of every Safety Instrumented Function (SIF) which comprises the SIS. When is the document made? If you refer to the Safety Lifecycle according to IEC 61511 (ISA …
Many process plants handle large amounts of hazardous materials (including flammable, explosive or toxic chemicals) at high temperatures and pressures (or in vacuum conditions)via complex processes. Hence there is a risk that there could be a disaster if something goes wrong and we could have fires, explosions and toxic chemical releases that can harm people and the environment. These incidents also damage assets and cause large scale destruction. In …
A Safety Instrumented System (SIS for short) is used in many process plants to ensure continued safe operation of the process. In case of any disturbance that is likely to result in an unwanted incident the SIS automatically brings the process to a safe state and prevents loss of life, asset damage and environmental damage. For process plants that handle hazardous, toxic, explosive or other similar materials, Safety Instrumented …
