INTRODUCTION
1 Scope
2 Normative references
3 Terms, definitions and abbreviations
4 Conformance to this International Standard
5 Management of functional safety
5.1 Objective
5.2 Requirements
6 Safety lifecycle requirements
6.1 Objective
6.2 Requirements
7 Verification
7.1 Objective
8 Process hazard and risk assessment
8.1 Objectives
8.2 Requirements
9 Allocation of safety functions to protection layers
9.1 Objective
9.2 Requirements of the allocation process
9.3 Additional requirements for safety integrity level 4
9.4 Requirement on the basic process control system as
a layer of protection
9.5 Requirements for preventing common cause, common
mode and dependent failures
10 SIS safety requirements specification
10.1 Objective
10.2 General requirements
10.3 SIS safety requirements
11 SIS design and engineering
11.1 Objective
11.2 General requirements
11.3 Requirements for system behaviour on detection of a fault
11.4 Requirements for hardware fault tolerance
11.5 Requirements for selection of components and subsystems
11.6 Field devices
11.7 Interfaces
11.8 Maintenance or testing design requirements
11.9 SIF probability of failure
12 Requirements for application software, including selection
criteria for utility software
12.1 Application software safety lifecycle requirements
12.2 Application software safety requirements specification
12.3 Application software safety validation planning
12.4 Application software design and development
12.5 Integration of the application software with the
SIS subsystem
12.6 FPL and LVL software modification procedures
12.7 Application software verification
13 Factory acceptance testing (FAT)
13.1 Objectives
13.2 Recommendations
14 SIS installation and commissioning
14.1 Objectives
14.2 Requirements
15 SIS safety validation
15.1 Objective
15.2 Requirements
16 SIS operation and maintenance
16.1 Objectives
16.2 Requirements
16.3 Proof testing and inspection
17 SIS modification
17.1 Objective
17.2 Requirements
18 SIS decommissioning
18.1 Objectives
18.2 Requirements
19 Information and documentation requirements
19.1 Objectives
19.2 Requirements
Annex A (informative) Example of techniques for calculating
the probability of failure on demand
for a safety instrumented function
Annex B (informative) Typical SIS architecture development
Annex C (informative) Application features of a safety PLC
Annex D (informative) Example of SIS logic solver application
software development methodology
Annex E (informative) Example of development of externally
configured diagnostics for a
safety-configured PE logic solver
Figures
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