Achieve a higher safety performance level with EN ISO 13849-1

If you do not consider yourself as one of the early adopters of ISO 13849-1, is there still time to change to comply to the machine safety standards current requirements, and what does it involve?

05/09/2013


Over the past few years, safety has become one of the dominant factors that impact product design processes. European guidelines for machine safety have played a major role in reducing injuries and are bringing new requirements for product and component developers in their goal of working toward creating a better and safer working environment.

At the end of 2011, EN ISO 13849-1:2006 “Safety of machinery, Safety-related parts of control systems, Part 1: General principles for design” took effect. The EN 954-1 (CAT B, CAT 2, CAT3 & CAT4) was replaced by ISO13849-1, because programmable electronic systems were considered insufficiently; there was no consideration for direct connection between risk minimization, category, or complexity. Also, time response (e.g., testing intervals, lifecycles) and the failure probability of components (e.g., Common Cause Failures) were not considered. Therefore, due to all these aspects, EN 954-1 did not represent the state of technology anymore.

EN ISO 13849-1 addresses the programmable electronic safety devices that are being used increasingly in modern machines. The standard also provides a quantitative approach to risk assessment and safety validation. This ensures that safety is not solely a matter of component reliability, but also relies on common-sense safety principles such as redundancy, diversity, and fail-safe behavior. Under this standard, the risk assessment for a given safety function will yield a performance level (PL). This helps eliminate both over- and under-engineering, a costly or risky result of EN 954-1’s limitations.

Safety designers should start designing products using EN ISO 13849-1. It improves safety and the experience of working with the new requirements, and will have much greater long-term benefits than using EN 954.

- Information provided by Siemens Industry Inc. Edited by Mark T. Hoske, content manager, CFE Media, Control Engineering and Plant Engineering, mhoske@cfemedia.com.

ONLINE extra

To help users with ISO 13849-1 safety design aspects, Siemens Industry Inc. and TUV Rheinland are providing training and certification courses.



No comments
The Engineers' Choice Awards highlight some of the best new control, instrumentation and automation products as chosen by...
The System Integrator Giants program lists the top 100 system integrators among companies listed in CFE Media's Global System Integrator Database.
The Engineering Leaders Under 40 program identifies and gives recognition to young engineers who...
This eGuide illustrates solutions, applications and benefits of machine vision systems.
Learn how to increase device reliability in harsh environments and decrease unplanned system downtime.
This eGuide contains a series of articles and videos that considers theoretical and practical; immediate needs and a look into the future.
Intelligent, efficient PLC programming: Cost-saving programming languages are available now; Automation system upgrades; Help from the cloud; Improving flow control; System integration tips
Smarter machines require smarter systems; Fixing PID, part 3; Process safety; Hardware and software integration; Legalities: Integrated lean project delivery
Choosing controllers: PLCs, PACs, IPCs, DCS? What's best for your application?; Wireless trends; Design, integration; Manufacturing Day; Product Exclusive
PLCs, robots, and the quest for a single controller; how OEE is key to automation solutions.
This article collection contains several articles on improving the use of PID.
Learn how Industry 4.0 adds supply chain efficiency, optimizes pricing, improves quality, and more.

Find and connect with the most suitable service provider for your unique application. Start searching the Global System Integrator Database Now!

Special report: U.S. natural gas; LNG transport technologies evolve to meet market demand; Understanding new methane regulations; Predictive maintenance for gas pipeline compressors
Cyber security cost-efficient for industrial control systems; Extracting full value from operational data; Managing cyber security risks
Drilling for Big Data: Managing the flow of information; Big data drilldown series: Challenge and opportunity; OT to IT: Creating a circle of improvement; Industry loses best workers, again