IEC 61508:2010（Parts 1-7）

Functional safety of electrical/electronic/programmable electronic safety-related systems

📅 Issue date：2010 🔄 Effective date：2010 🌍 Type：国际标准（功能安全基础）

📑 Table of Contents

1 Scope
2 Normative references
3 Terms and definitions
4 Technical requirements

01 Scope

IEC 61508 is the foundational functional-safety standard for E/E/PE safety-related systems across their life cycle, introducing SIL 1~4; it is the framework referenced by sector standards (process, automotive, medical).

02 Normative references

IEC 61508-1 General
IEC 61508-2 E/E
IEC 61508-3 Software
IEC 61508-4~7

03 Terms and definitions

SIL

Safety Integrity Level 1~4 (4 highest) from target failure measures (PFDavg/PFH).

Safety life cycle

Safety management, analysis, design and verification from concept to decommissioning.

04 Technical requirements

SIL targets

PFH (high demand) / PFDavg (low demand) target ranges per SIL 1~4.

Systematic capability

Component failure rates and diagnostics meet SIL capability.

Software

Life-cycle, design and verification per SIL.

📎 Related standards

Disclaimer：This page is a technical summary of the corresponding standard for quick reference. All limits, clauses and methods are subject to the official publication and its latest amendments; formal compliance assessment must refer to the official issued text.