Safety Instrumentation and Emergency Shutdown Systems

Best Practices using IEC 61508 & IEC 61511


Functional process safety involves identifying potential hazardous events that can trigger a chain reaction that could lead to serious or catastrophic consequences. This LAKESHORE ISL Safety Instrumentation and Emergency Shutdown Systems training seminar explains the requirements of the international standards IEC 61508 and IEC 61511, for functional safety instrumented system and, covers the entire life-cycle of safety instrumented systems, from determining what risk control systems are required through to decommissioning.  This also includes the separation of basic process control systems and safety instrumented systems (SIS), layers independent protection (LOPs), how to determine safety integrity levels (SILs), technology choices and field device issues.

This LAKESHORE ISL Safety Instrumentation and Emergency Shutdown Systems training seminar primarily focuses on establishing conceptual and detailed design requirements, hazard analysis techniques, safety requirements specification, and the commissioning, operating and maintenance procedures.

This LAKESHORE ISL training seminar will highlight:

  • Hazard and Risk Reduction Studies
  • Explaining Technology an Equipment Choices
  • Safety Requirement Specifications for an SIS
  • Selection of Field Devices (Sensors, Programmable Logic Controllers and Valves)
  • Establishing Operation and Maintenance Procedures


This LAKESHORE ISL training seminar on Safety Instrumentation and Emergency Shutdown Systems is to acquaint instrumentation and control system engineers with the essentials of the IEC 61508 and IEC 61511 safety instrumented systems standards and, how they relate to the safety life cycle of developing and maintaining safety instrumented systems. The fundamental tools will enable delegates to evaluate, design, install and maintain Safety Instrumented Systems (SISs) and to determine their Safety Integrity Level (SILs) requirements.

 At the end of this LAKESHORE ISL training seminar, you will learn to:

  • Understand requirements of the international standards IEC 61598 and IEC 61511
  • Apply the IEC 61508 Safety Instrumented System Development ‘Safety Life Cycle’ model
  • Determine the Safety Integrity Level (SIL) using risk assessment methods
  • Understand the specifications of emergency shutdown protection requirements
  • Establish specification requirements for sensor, programmable logic controller and valves
  • Follow Management of Change (MOC) procedures for control of future SIS changes

Training Methodology

This LAKESHORE ISL Safety Instrumentation and Emergency Shutdown Systems training seminar uses a range of approaches for learning, including group activities, exercises and case studies. Key part of the learning process is sharing of experiences and knowledge. Throughout the training seminar, delegates will learn through active participation using exercises and case studies.

Organisational Impact

In addition to the professional development of staff, the organisation will be able to prioritise resources for developing and managing safety instrumentation system projects, including: 

  • Implementing safety instrumented systems that optimises production and safety
  • Use well proven risk assessment and analysis for competent SIS development
  • More effective implementation in upgrading existing emergency shutdown controls
  • Improved confidence in the prevention of hazardous incidents

Personal Impact

Attendees will be able to apply skills learnt from this training at a practical level to identify, develop and implement safety-instrumented systems.

  • Delegates will gain skills to be able select technology choices that meets IEC 61508/61511
  • By using these skills you can competently implement the SIS safety life cycle

Who Should Attend?

This LAKESHORE ISL Safety Instrumentation and Emergency Shutdown Systems training seminar is specifically tailored for anyone involved in the field of emergency shutdown and safety related instrumentation systems according to IEC 61508 and IEC 61511 requirements.

  • Personnel who are responsible for the designing, selecting, specifying, installing, operating and maintaining safety instrumentation systems
  • Experienced professionals who want to broaden their understanding of safety instrumentation systems (SIS)

This LAKESHORE ISL training seminar is also suitable to a wide range of professional but will greatly benefit:

  • Design and Electrical Engineers
  • Instrument and Process Control Engineers and Technicians
  • Mechanical Engineers and Technicians
  • Operations and Process Engineers
  • Line Managers and Supervisors

Seminar Outline


Introduction to Safety Instrumentation Systems

  • Overview of Safety Instrument Functions (SIFs)
  • Introduction to Standards IEC 61508 and IEC 61511
  • Equipment Under Control (EUC)
  • Introduction in Identifying Hazards and Analysing Risks
  • Safety Instrumented Systems (SIS) – Safety Life Cycle Stages
  • Overview of Safety Integrity Levels (SILs)


Hazards & Risk Reduction

  • Identifying Hazards and Risk Analysis Tools
  • Process Control vs. Safety Control
  • Layers of Protection Models (LOPs)
  • Risk Reduction and Risk Ranking Classification
  • Determining Safety Integrity Levels (SILs)
  • Developing the Safety Requirements Specification


Technology Choices and Reliability Analysis

  • IEC 61508 / IEC 61511 Technology Requirements
  • Pneumatic Systems
  • Relay Systems and Solid-state Systems
  • Microprocessor / PLC Systems
  • Issues related to System Size and Complexity
  • Reliability of Components Databases


Overview of SIS Field Devices

  • Importance of Field Devices
  • Types of Sensors
  • Final Elements (pressure relief and shutdown valves)
  • Nuisance Trips, Voting Schemes and Redundancy
  • Design requirements for Field Devices
  • Installation of Field Device concerns


Safety Systems Engineering

  • Step-by-Step Safety Instrumentation System Development Plan
  • SIS Functional Testing Procedures
  • Information Flow and Preparation of Documents
  • Managing existing and future changes to an SIS
  • Review of an SIS Design Checklist
  • Close of Course