PD CLC IEC/TR 61511-0:2019

What is PD CLC IEC/TR 61511-0 – Safety instrumented systems about?  

PD CLC IEC/TR 61511-0 provides an overview of the other three parts of IEC 61511. Part 1 is the normative part of the series. 

PD CLC IEC/TR 61511-0 includes terminology, and requirements for specification, hardware design and application programming, commissioning, validation, operation, maintenance, and testing of Safety instrumented systems (SIS) components. To address systematic failures, it also includes requirements for management of the SIS lifecycle which include: 

• Developing a plan identifying responsibilities and activities for each lifecycle phase 
• Competency of persons, departments and organizations 
• Supplier quality management 
• Change and bypass management 
• Verification, testing, assessments and audits 
• Tracking and timely closure of action items 

 IEC 61511- part 2 is an informative part of the series. It provides guidance and implementation examples of requirements outlined in Part 1. IEC 61511 – part 3 is the part of the series that provides information on available methods to conduct Hazard and Risk Assessment (H&RA) to determine integrity requirements, i.e. Safety Integrity Level (SIL). 

Who is PD CLC IEC/TR 61511-0 - Safety instrumented systems for? 

PD CLC IEC/TR 61511-0 on Safety instrumented systems is useful for: 

• The automation industry 
• The process industry sector  
• Hardware designers 
• Software programmers 
• Mechanical engineers 
• Quality control personnel 

Why should you use PD CLC IEC/TR 61511-0 - Safety instrumented systems?  

There are many hazards in process industries that can lead to loss of containment, resulting in an impact on health, safety, environment and plant assets. Process safety is best achieved by using inherently safe processes. However, when this is not practical or possible, protective systems are required to mitigate the risk of hazards to an acceptable level. Functional requirements for these protective systems are determined from a Hazard and Risk Assessment (H&RA) and good engineering practices.  

Protective systems may be implemented using different technologies such as mechanical, chemical, pneumatic, hydraulic, electric, electronic or programmable electronic. End users in the process industry should use PD CLC IEC/TR 61511-0 to develop their internal procedures, work processes, and management systems. Implementing an SIS lifecycle management system provides a framework for managing people, processes, and systems to improve overall safety and operational performance.