Functional Safety and Standards

Copyright © 2011 Rockwell Automation, Inc. All rights reserved.

Functional Safety and Standards

Mike Miller & Derek Jones


ISO 13849-1 IEC 62061

SustainabilityTime to market

Information Compliance

ProductivityPerformance

Development Costs Ops & Maintenance Costs

What is it? It’s NOT just about Equations,Standards and schematics…

It’s about ……………

What is functional safety?

Functional Safety – Overview of requirements for design

6. Functional safety management

5. Systematic integrity

1. Probability of dangerous failure / Mean time to dangerous failure

3. Safe failure fraction / Diagnostic coverage

2. Fault tolerance / Category

4. Common cause failure



Safety Management – Roles and Responsibilities















Background for Functional Safety Management

Installation & setting into operation 6 %

Modification after setting into operation 20 %

Design & Implementation 15 %

Operation & maintenance 15 %

Specification 44 %

Source: „Out Of Control“, UK HSE (September 2004)

New Standards for Safety of Machinery

Traditional Perspective of Safety:

• Reduced Machine Utilization• Reduced Operational Efficiency• Increased Labor Costs• Increased Mean Time To Repair• Increased Nuisance Shutdowns

SAFETY

PRODUCTIVITY• Reduced Healthcare costs• Reduced Litigation costs

Safety and Productivity are Mutually Exclusive Objectives

Belief is safety = increased cost and impact

Copyright © 2009 Rockwell Automation, Inc. All rights reserved. 14





The Changing world of standards

ANSI Series of North American standards

• ANSI B11.0 - Safety of Machinery - General Requirements and Risk Assessment (combined machine safety and risk assessment methodology into one document and harmonization)

• ANSI B11.19 - Performance Criteria for Safeguarding (revised to include advances in technology and harmonization with international standards)

• ANSI/PMM1 B155.1 - Safety Requirements for Packaging Machinery and Packaging-Related Converting Machinery (revised to include technology advances and harmonization)

• ANSI/RIA 15.06 - for Industrial Robots and Robot Systems - Safety Requirements (revised to include technology advances and harmonization with ISO 10218)

• ANSI/NFPA 79 - Electrical Standard for Industrial Machinery (revised to included changes in technology))

Changes in IEC/ISO/EN Standards

• IEC/EN 62061 – Functional safety of electrical control systems for machinery (forging links to IEC 60947 series and other product standard)

• EN ISO 13849 Safety related parts of machinery control systems (EN 954 being withdrawn - EN ISO 13849-2 Validation to be published)

• Merging of IEC62061/ISO 13849 Machinery safety control systems (Clarifies existing requirements and gives more options)

• EN ISO 14119 (EN 1088) Guard interlock devices (Functional safety classification, Technology update, access control, series connection changes)

• MT/IEC 60204 - Safety of machinery - Electrical equipment of machines - Part 1: General requirements


Thank You.