Functional SafetyHazardous Energy Control ProceduresISO 13849LockoutOntarioQ & A

Q & A: Can Safety PLCs be used for Lockout?

Disconnect Switch with Lock and Tag
This entry is part 2 of 2 in the series Q&A

The ques­tion of lock­out and the use of safety PLCs as a means to meet the lock­out require­ments comes up more and more fre­quently these days. Can Safety PLCs be used for lock­out? Safety pro­fes­sion­als don’t always agree on this con­tro­ver­sial top­ic!

Dur­ing the Free Safety Talks that we did with Schmersal Canada and Frank­lin Empire, this hot ques­tion came up, so I thought I’d cov­er it off in a video. If you need some spe­cif­ic help with an applic­a­tion like this, please get in touch with Doug dir­ectly.

There is a lot to say, and in this video I try to cov­er off the reas­ons why Safety PLCs and Lock­out don’t always mix well.

Notes

Ontario Reg­u­la­tion 851, Indus­tri­al Estab­lish­ments

CSA Z432, Safe­guard­ing of Machinery

CSA Z460, Con­trol of haz­ard­ous energy – Lock­out and oth­er meth­ods

ISO 13849 – 1, Safety of machinery — Safety-related parts of con­trol sys­tems — Part 1: Gen­er­al prin­ciples for design

ISO 13849 – 2, Safety of machinery — Safety-related parts of con­trol sys­tems — Part 2: Val­id­a­tion

IEC 62061, Safety of machinery – Func­tion­al safety of safety-related elec­tric­al, elec­tron­ic and pro­gram­mable elec­tron­ic con­trol sys­tems

IEC TR 62061 – 1:2010, Guid­ance on the applic­a­tion of ISO 13849 – 1 and IEC 62061 in the design of safety-related con­trol sys­tems for machinery

Ques­tions? Leave a com­ment below or email Doug.

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