Q & A: Category 2 and Testing Intervals

Logical block diagram for ISO 13849-1 Category 2 architecture.
This entry is part 1 of 2 in the series Q & A

Dur­ing the Free Safe­ty Talks that we did with Schm­er­sal Cana­da and Franklin Empire, we had a “hot ques­tion” come up regard­ing Cat­e­go­ry 2 archi­tec­ture and the test­ing inter­val require­ment. In the short video below, Doug answers that ques­tion.

If you have more ques­tions or felt some­thing wasn’t clear in the video, leave us a com­ment and we will get back to you!

If you are hav­ing prob­lems with devel­op­ing your safe­ty func­tion, please get in touch with Doug direct­ly.

Notes

Email Doug direct­ly.

References

[1]     Safe­ty of machin­ery — Safe­ty-relat­ed parts of con­trol sys­tems — Part 1: Gen­er­al prin­ci­ples for design. ISO 13849–1. 2015.

[2]     “The Bath­tub Curve and Prod­uct Fail­ure Behav­ior (Part 2 of 2)”, Weibull.com, 2018. [Online]. Avail­able: http://www.weibull.com/hotwire/issue22/hottopics22.htm. [Accessed: 13- May- 2018].

[3]    Ger­man Social Acci­dent Insur­ance (DGUV) — Insti­tute for Occu­pa­tion­al Safe­ty and Health (BGIA), “Func­tion­al safe­ty of machine con­trols — Appli­ca­tion of ISO 13849–1 — Report 2/2008e”, Insti­tute for Occu­pa­tion­al Safe­ty and Health (BGIA), Sankt Augustin, DE, 2008.

[4]     “Safe­ty Cir­cuit Exam­ples of Safe­ty Com­po­nents | Tech­ni­cal Guide | Aus­tralia | Omron IA”, Omron.com.au, 2018. [Online]. Avail­able: http://www.omron.com.au/service_support/technical_guide/safety_component/safety_circuit_example.asp. [Accessed: 14- May- 2018].

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Acknowl­edge­ments: ISO, OMRON, oth­ers as cit­ed.
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Series Nav­i­ga­tion& A: Can Safe­ty PLCs be used for Lockout?”>Q & A: Can Safe­ty PLCs be used for Lock­out?

Author: Doug Nix

Doug Nix is Managing Director and Principal Consultant at Compliance InSight Consulting, Inc. (http://www.complianceinsight.ca) in Kitchener, Ontario, and is Lead Author and Senior Editor of the Machinery Safety 101 blog. Doug's work includes teaching machinery risk assessment techniques privately and through Conestoga College Institute of Technology and Advanced Learning in Kitchener, Ontario, as well as providing technical services and training programs to clients related to risk assessment, industrial machinery safety, safety-related control system integration and reliability, laser safety and regulatory conformity. For more see Doug's LinkedIn profile.