Machine safety: Incorporating functional safety, part 2
When considering “functional safety,” look at what differs compared to other safety initiatives, consider U.S. versus international standards, examine conformance responsibilities, and think about what changes are needed, if any, as a manufacturer. Part 2 of 4 looks at U.S. vs. international safety.
When considering “functional safety,” look at what differs compared to other safety initiatives, consider U.S. versus international standards, examine conformance responsibilities, and think about what changes are needed, if any, as a manufacturer.
2. Are U.S. domestic standards adopting functional safety requirements from the international standards?
3. Do the international standards place primary conformance responsibility on manufacturers like with OSHA?
4. Do we have to change our machine safety program as a manufacturer in order to meet the compliance requirements?
Let’s take a look at these four questions addressing the second question in Part 2.
Definition from IEC 61508-1 - Functional safety is “part of the overall safety relating to the equipment under control and the equipment under control’s control system which depends on the correct functioning of the Electrical/Electronic/Programmable Electronic safety-related systems, other technology safety-related systems and external risk reduction facilities”.
Are U.S. domestic standards adopting functional safety requirements from the international standards?
Who has an answer or supporting comment about this question? I can say from my perspective that several domestic standards bodies are beginning to roll some of the new requirements into their standard during scheduled update cycles. International standards, like ISO 13849-1: 2006 Safety of machinery —Safety-related parts of control systems, are clear to state that their intended audience is designers.
So my advice is that you should take careful notice of your particular standards for your business and types of machines to see if and how your particular standard might be impacted. For example, as an OEM or systems integrator you will most likely see these changes because of your machine control design activities within your business. On the other hand if you are an end user with no control system design engagement just how these changes impact your end user requirements is still unclear in my perspective.
You may not design circuits for your machines and you may not have designers within your business. Even though you may not be engaged in the design of machine control systems don’t you still need to be aware that the requirements will focus more strongly on the functions that are necessary to reduce each individual risk, and what performance is required for each function, rather than simply relying on particular components?
Have you found difficulty understanding any of these issues? Add your comments or thoughts to the discussion by submitting your ideas, experiences, and challenges in the comments section below.
Contact: http://www.jbtitus.com for “Solutions for Machine Safety”.
|Search the online Automation Integrator Guide|
Case Study Database
Get more exposure for your case study by uploading it to the Control Engineering case study database, where end-users can identify relevant solutions and explore what the experts are doing to effectively implement a variety of technology and productivity related projects.
These case studies provide examples of how knowledgeable solution providers have used technology, processes and people to create effective and successful implementations in real-world situations. Case studies can be completed by filling out a simple online form where you can outline the project title, abstract, and full story in 1500 words or less; upload photos, videos and a logo.
Click here to visit the Case Study Database and upload your case study.