This course will cover the operation and basic hardware of Safety Instrumented Systems (SIS), Total Plant Shutdown Systems (TPS), Emergency Shutdown Systems (ESD), Process Shutdown Systems (PSD) and Unit Shutdown Systems (USD).

Day one of the course covers a basic introduction and the design philosophy of the SIS. It differentiates between function of the control system versus the SIS and deals with levels of protection with respect to the risks present.  Day two continues with evaluating and functionally testing an SIS. Any changes to the SIS must be managed to ensure its reliability.

Day two continues with an introduction to the TPS, ESD, PSD and USD systems. Permissives and interlocks are the basis of TPS, ESD, PSD and USD systems, are covered as well as a review and discussion of logic solvers which are an important part of shutdown systems. Day three continues with a discussion of the characteristics of TPS, ESD, PSD and USD systems.

  • Agenda
  • Audience
  • Technical Information

Day 1
Safety Instrumented Systems (SIS)

  • Introduction to SIS
  • Design Life Cycle
  • Process Control vs Safety Control
  • Protection Layers
  • Safety Integrity Levels

Participants will learn how the SIS provides protection, as a whole, to the plant in the event of an uncontrollable situation. Hindsight as well as foresight must be employed in the design of the SIS system. The process control system must be separate from the SIS. The SIS is divided into various levels to ensure the safe operation of the plant.


Day 2
Safety Instrumented Systems (SIS)

  • Evaluating Risk
  • Initial System Evaluation
  • Functional Testing of SIS
  • Managing Changes to an SIS System
  • Determining Reliability


  • Introduction
  • Permissives and Interlocks
  • High Reliability Logic Solver

Participants will be made aware that an important step in designing the SIS system is to establish the risks involved in operating the plant. Procedures must be in place to continually evaluate, manage changes and assess the reliability of the SIS. Participants will be exposed to how SIS can be divided into the TPS, ESD, PSD and USD systems. These systems rely on the appropriate hardware and software to make them work reliably.


Day 3

  • Failure Modes
  • Alarms
  • Redundancy (TMR)
  • Resetting Testing and Bypassing
  • Documentation and Cause & Effect Drawings

The participants will become familiar with the characteristics of typical TPS, ESD, PSD and USD systems. Standards in alarm systems are covered and the use of redundancy is demonstrated to ensure shutdown system reliability. The importance of resetting, testing and bypassing procedures is also identified.  The use of Cause and Effect drawings will show the participants how the shutdown systems will operate in a facility specific application.

This course is mainly targeted to process operators, process technicians, laboratory and maintenance personnel. The course can also be applicable to employees working with equipment and materials purchasing, equipment procurement, job planning as well as immediate supervisors to the working technicians.

Discipline:    Process operations

Delivery type:   Classroom

Provider:    TPL

Possible Instructors: Fully qualified and certified TPL instructor with a minimum of 15 years instructor experience to international delegates in client or offsite locations.

Level:    Foundation

Course Version:      0

Length:       3 days

Skills Needed to
Take Course (pre-requisites):
    Participants should have some recent exposure to shutdown system terminology in the oil and gas industry.