BS EN 61511-2:2017

What is BS EN 61511-2- Safety instrumented systems for the process industry sector about?

BS EN 61511-2 is a series of European standards on safety instrumented systems that discusses

the guidelines on safety instrumented systems for the process industry sector.

BS EN 61511-2 provides guidance on the specification, design, installation, operation, and maintenance of SIFs and related SIS.

BS EN 61511-2 specifies functionals safety of the Safety instrumented systems for the process industry sector about instrumented systems for the process industry sector.

Note 1: Annex A (informative) has been organized so that each clause and subclause number therein addresses the corresponding clause and subclause number in IEC 61511-1:2016 except for being preceded by “A”.

Note 2: Annex A now contains material previously in the body of the first edition. These changes are required for compliance with IEC rules which prohibit a standard from being wholly informative.

Note 3: To achieve maximum use of this guideline;

– review the section guidance as well as the specific clause guidance.

– when specific clause guidance is not provided

Note 4: Examples given in the Annexes of this Standard are intended only as case-specific examples of implementing IEC 61511 requirements in a specific instance, and the user should satisfy themselves that the chosen methods and techniques are appropriate to their situation.

Who is BS EN 61511-2- Safety instrumented systems for the process industry sector for?

BS EN 61511-2 on Safety instrumented systems for the process industry sector is useful for:

• SIS industry
• Safety regulation department

Why should you use BS EN 61511-2- Safety instrumented systems for the process industry sector?

Safety instrumented systems (SISs) have been used for many years to perform safety instrumented functions (SIFs) in the process industries. If instrumentation is to be effectively used for SIFs, this instrumentation must achieve certain minimum standards.

BS EN 61511-2 addresses the application of SISs for the process industries.

BS EN 61511-2 deals with the interface between SISs and other safety systems in requiring that a process H&RA be carried out. The SIS includes sensors, logic solvers, and final elements.

BS EN 61511-2 series has two concepts, which are fundamental to its application; SIS safety life-cycle and the safety integrity level (SIL).

As a user of BS EN 61511-2, you can be ensured of safety instrumented systems and safety instrumented functions (SIFs) in the process industries. With obedience and compliance to BS EN 61511-2, you can be aware of safety life-cycle requirements, process hazard and risk assessment, allocation of safety functions to protection layers, SIS safety requirements specification. BS EN 61511-2 assists you in the design, installation, operation, and maintenance of SIFs and related SIS. BS EN 61511-2 provides you with comprehensive information on safety instrumented systems for the process industry sector.

What’s changed since the last update?

BS EN 61511-2:2017 supersedes BS EN 61511‑2:2004. BS EN 61511-2:2017 includes some technical changes with respect to BS EN 61511‑2:2004. These include:

• Guidance examples based on all phases of the safety life cycle provided based on user experience with IEC61511 1st edition
• Annexes replaced to address the transition from software to application programming