ISA 84.01 : 1996

Introduction
1 Scope
   1.1 Boundaries of the Safety Instrumented System (SIS)
   1.2 Exclusions
2 Conformance to this standard
   2.1 Conformance guidance
   2.2 Existing systems
3 Definition of terms and acronyms
   3.1 Definitions
   3.2 Acronyms
4 Safety life cycle
   4.1 Scope
   4.2 Safety Life Cycle steps
5 Safety requirements specifications development
   5.1 Objective
   5.2 Input requirements
   5.3 Safety functional requirements
   5.4 Safety integrity requirements
6 SIS conceptual design
   6.1 Objectives
   6.2 Conceptual design requirements
7 SIS detailed design
   7.1 Objective
   7.2 General requirements
   7.3 SIS logic solver
   7.4 Field devices
   7.5 Interfaces
   7.6 Power sources
   7.7 System environment
   7.8 Application logic requirements
   7.9 Maintenance or testing design requirements
8 Installation, commissioning and pre-startup
   acceptance test
   8.1 Objective
   8.2 Installation
   8.3 Commissioning
   8.4 Pre-Startup Acceptance Test (PSAT)
9 SIS operation and maintenance
   9.1 Objective
   9.2 Training
   9.3 Documentation
   9.4 SIS operating procedures
   9.5 Maintenance program
   9.6 Testing, inspection, and maintenance
   9.7 Functional Testing
   9.8 Documentation of functional testing
10 SIS Management of Change (MOC)
   10.1 Objective
   10.2 MOC procedure
   10.3 MOC documentation
11 Decommissioning
   11.1 Objective
   11.2 General
12 Differences
   12.1 Terminology
   12.2 Organizational differences
   12.3 Technology differences
Annex A (Informative) - Information and examples illustrating
         methods for determining Safety Integrity Level (SIL)
         for a Safety Instrumented System (SIS)
      A.1 Introduction
      A.2 Safety Integrity Level (SIL) considerations
           and the process example
      A.3 Example methods for selecting SIL
Annex B (Informative) - SIS design considerations
      B.1 Separation - identical or diverse
      B.2 Redundancy - identical or diverse
      B.3 Software design considerations
      B.4 Technology selection
      B.5 Failure rates and failure modes
      B.6 Architecture
      B.7 Power sources
      B.8 Common cause failures
      B.9 Diagnostics
      B.10 Field devices
      B.11 User interface
      B.12 Security
      B.13 Wiring practices
      B.14 Documentation
      B.15 Functional test interval
Annex C (Informative) - Informative references
Annex D (Informative) - Example
      D.1 Introduction to the example problem
      D.2 Safety Life Cycle
      D.3 Safety requirement specification
      D.4 Safety integrity requirements
      D.5 Conceptual design
      D.6 Detail design
Annex E (Informative) - Index

Deals with Electrical/Electronic/Programmable Electronic System (E/E/PES), associated sensors, final elements and interfaces for use in automated Safety Instrumented Systems (SIS) for the process industries. Examples of E/E/PES technologies are solid state logic, relays and timers, PES, electromechanical relays, motor-driven timers, hard-wired logic, and combinations of these.