Machinery Safety 101

ISO 13849 – 1 Analysis — Part 5: Diagnostic Coverage (DC)

A graph showing the theoretical "bathtub curve" for product failure rate over the lifetime of the product.
This entry is part 5 of 9 in the series How to do a 13849 – 1 ana­lys­is

Post updated 2019-07-24. Ed. What is Dia­gnost­ic Cov­er­age? Under­stand­ing Dia­gnost­ic Cov­er­age (DC) as it is used in ISO 13849 – 1 [1] is crit­ic­al to ana­lys­ing the design of any safety func­tion assessed using this stand­ard. In case you missed a pre­vi­ous part of the series, you can read it here. In the last instal­ment of this series dis­cuss­ing…

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ISO 13849 – 1 Analysis — Part 4: MTTFD – Mean Time to Dangerous Failure

This entry is part 4 of 9 in the series How to do a 13849 – 1 ana­lys­is

Post updated 2019-07-24. Ed. Func­tion­al safety is all about the like­li­hood of a safety sys­tem fail­ing to oper­ate when you need it. Under­stand­ing Mean Time to Dan­ger­ous Fail­ure, or MTTFD, is crit­ic­al. If you have been read­ing about this top­ic at all, you may notice that I am abbre­vi­at­ing Mean Time to Dan­ger­ous Fail­ure with all cap­it­al…

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ISO 13849 – 1 Analysis — Part 3: Architectural Category Selection

This entry is part 3 of 9 in the series How to do a 13849 – 1 ana­lys­is

Post updated 2019-07-24. Ed. At this point, you have com­pleted the risk assess­ment, assigned required Per­form­ance Levels to each safety func­tion, and developed the Safety Require­ment Spe­cific­a­tion for each safety func­tion. Next, you need to con­sider three aspects of the sys­tem design: Archi­tec­tur­al Cat­egory, Chan­nel Mean Time to Dan­ger­ous Fail­ure (MTTFD), and Dia­gnost­ic Cov­er­age (DCavg). In…

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ISO 13849 – 1 Analysis — Part 2: Safety Requirement Specification

This entry is part 2 of 9 in the series How to do a 13849 – 1 ana­lys­is

This art­icle was updated 2019-07-24. Ed. Devel­op­ing the Safety Require­ment Spe­cific­a­tion The Safety Require­ment Spe­cific­a­tion sounds pretty heavy, but actu­ally, it is just a big name for a way to organ­ize the inform­a­tion you need to have to ana­lyze and design the safety sys­tems for your machinery. Note that I am assum­ing that you are doing this in…

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ISO 13849 – 1 Analysis — Part 1: Start with Risk Assessment

This entry is part 1 of 9 in the series How to do a 13849 – 1 ana­lys­is

This post was updated 2019-07-24 I often get ques­tions from cli­ents about how to get star­ted on Func­tion­al Safety using ISO 13849. This art­icle is the first in a series that will walk you through the basics of using ISO 13849. Keep in mind that you will need to hold a copy of the 3rd edi­tion of ISO 13849 – 1 [1]…

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New CSA Standard for Machinery Electrical Equipment

Elec­tric­al Equip­ment of Machinery Most mod­ern machinery is con­trolled elec­tric­ally, or elec­tron­ic­ally. There are a num­ber of stand­ards that apply to the design of con­trol sys­tems for machinery, with IEC 60204 – 1 and it’s EN equi­val­ent, along with IEC 61439 – 1 and IEC 61439 – 2 as the pre­dom­in­ant stand­ards inter­na­tion­ally, and NFPA 79 as the pre­dom­in­ant stand­ard in the…

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New Directions in Plastics Machinery

Canada’s Par­ti­cip­a­tion in ISO TC 270 In Feb­ru­ary of 2016, Canada formed the SCC Mir­ror Com­mit­tee (SMC) to ISO TC 270, Rub­ber and Plastics Machinery. This inter­na­tion­al tech­nic­al com­mit­tee is cur­rently devel­op­ing ISO 20430, the first inter­na­tion­al plastic injec­tion mould­ing machine stand­ard. Until the pub­lic­a­tion of ISO 20430, two stand­ards have been fight­ing for dom­in­ance: EN 201, Plastics and…

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Workplace Risk Assessment – CSA Z1002: Love it, Hate it, Tweak it

The CSA Z1002 TC Needs to Know: Love it, Hate it, Tweak it? We need to know: Do you Love CSA Z1002? Hate CSA Z1002? Does it need some tweak­ing? The First of Its Kind In 2012, CSA pub­lished the first OHS Risk Assess­ment Stand­ard of its kind: CSA Z1002, Occu­pa­tion­al health and safety — Haz­ard iden­ti­fic­a­tion and elim­in­a­tion and…

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Industrial Exception” Becomes Permanent in Ontario

A group surrounding a computer discussing a problem.

The “Indus­tri­al Excep­tion” The “Indus­tri­al Excep­tion” is a clause in the Ontario Pro­fes­sion­al Engin­eer­’s Act that per­mits unli­censed people to do work nor­mally reserved for licenced engin­eers. Ontario is the only Cana­dian Province or Ter­rit­ory to have this kind of excep­tion. Ontario Fall Eco­nom­ic Out­look The Ontario Gov­ern­ment com­mit­ted to main­tain­ing the “indus­tri­al excep­tion” in the Pro­fes­sion­al…

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CSA Z432 Third Edition Open for Public Review!

CSA Z432, Safe­guard­ing of Machinery, is the basic stand­ard for Canada when it comes to most types of machinery. Only Power Presses and Press Brakes, and Indus­tri­al Robots are covered sep­ar­ately in their own stand­ards. CSA Z432 provides guid­ance on import­ant top­ics, like: Risk Assess­ment Risk reduc­tion through the Hier­archy of Con­trols Guard design require­ments…

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