Canada

Instructions for Use – the New ISO 20607

Posted on

Instruc­tions are one of the basic items that users expect to get when they pur­chase a product, and yet these import­ant doc­u­ments are often poorly writ­ten, badly trans­lated, and incom­plete. Key product fea­tures are badly described, and inform­a­tion on fea­tures, set­tings and haz­ards may be absent. All of this des­pite the fact that the min­im­um require­ments […]

Canada

More E-Stop Questions

Posted on
This entry is part 17 of 16 in the series Emer­gency Stop

Here are some more ques­tions I’ve been asked regard­ing emer­gency stop require­ments. These ones came to me through the IEEE PSES EMC-PSTC Product Com­pli­ance For­um mail­ing list. Primary Sources There are three primary sources for the require­ments for emer­gency stop devices: [1] Safety of machinery — Emer­gency stop — Prin­ciples for design, 3rd Edi­tion. ISO 13850. 2015. [2] Safety of […]

Events

Five reasons you should attend our Free Safety Talks

Posted on
Banner for the Free Safety Talks

Reas­on #1 – Free Safety Talks You can’t argue with Free Stuff! Last week we partnered with Schmersal Canada and Frank­lin Empire to put on three days of Free Safety Talks. We had full houses in all three loc­a­tions, Wind­sor, Lon­don and Cam­bridge, with nearly 60 people par­ti­cip­at­ing. We had two great presenters who helped […]

Functional Safety

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

Posted on
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 […]

Canada

CETA in force!

Posted on
Image with the Canadian and EU flags blending together.

CETA comes into force today, 21-Sep-2017 If you are unfa­mil­i­ar with CETA, the Com­pre­hens­ive Eco­nom­ic and Trade Agree­ment, this ground­break­ing trade agree­ment between Canada and the European Uni­on will be a game-changer for Canada. Until today, the actu­al date for imple­ment­a­tion of the agree­ment has been a mov­ing tar­get. There were at least two pre­vi­ous dates announced […]

Canada

Machinery Safety Labels: 3 Top Tools for Effective Warnings

Posted on
Safety label by Clarion Safety Systems
This entry is part 1 of 3 in the series Safety Labels

Machinery Safety Labels The third level of the Hier­archy of Con­trols is Inform­a­tion for Use. Safety Labels are a key part of the Inform­a­tion for Use provided by machine build­ers to users and are often the only inform­a­tion that many users get to see. This makes the design and place­ment of the safety labels crit­ic­al to […]

Canada

Safe Drive Control including Safe Torque Off (STO)

Posted on
Graph illustrating STO Function
This entry is part 12 of 16 in the series Emer­gency Stop

Ed. Note: This art­icle was revised 25-Jul-17 to include inform­a­tion on safe stand­still. Safe Drive Con­trol includ­ing STO Motor drives are every­where. From DC vari­able speed drives and index­ing drives, through AC Vari­able Fre­quency drives, servo drives and step­per motor drives, the cap­ab­il­it­ies and the flex­ib­il­ity of these elec­tron­ic sys­tems has giv­en machine design­ers unpre­ced­en­ted […]

Canada

ISO 13849 – 1 Analysis — Part 8: Fault Exclusion

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

Fault Con­sid­er­a­tion & Fault Exclu­sion ISO 13849 – 1, Chapter 7 [1, 7] dis­cusses the need for fault con­sid­er­a­tion and fault exclu­sion. Fault con­sid­er­a­tion is the pro­cess of examin­ing the com­pon­ents and sub-sys­tems used in the safety-related part of the con­trol sys­tem (SRP/CS) and mak­ing a list of all the faults that could occur in each one. This a def­in­itely non-trivi­al […]

Canada

ISO 13849 – 1 Analysis — Part 7: Safety-Related Software

Posted on
General architecture model of software
This entry is part 7 of 9 in the series How to do a 13849 – 1 ana­lys­is

Safety-Related Soft­ware Up to this point, I have been dis­cuss­ing the basic pro­cesses used for the design of safety-related parts of con­trol sys­tems. The under­ly­ing assump­tion is that these tech­niques apply to the design of hard­ware used for safety pur­poses. The remain­ing ques­tion focuses on the design and devel­op­ment of safety-related soft­ware that runs on that […]

Canada

ISO 13849 – 1 Analysis — Part 6: CCF — Common Cause Failures

Posted on
This entry is part 6 of 9 in the series How to do a 13849 – 1 ana­lys­is

What is a Com­mon Cause Fail­ure? There are two sim­il­ar-sound­ing terms that people often get con­fused: Com­mon Cause Fail­ure (CCF) and Com­mon Mode Fail­ure. While these two types of fail­ures sound sim­il­ar, they are dif­fer­ent. A Com­mon Cause Fail­ure is a fail­ure in a sys­tem where two or more por­tions of the sys­tem fail at the same time from a single […]