Canada

Emergency Stop – What’s so confusing about that?

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Emergency Stop on machine console
This entry is part 1 of 14 in the series Emer­gency Stop

I get a lot of calls and emails ask­ing about emer­gency stops. This is one of those decept­ively simple con­cepts that has man­aged to get very com­plic­ated over time. Not every machine needs or can bene­fit from an emer­gency stop. In some cases, it may lead to an unreas­on­able expect­a­tion of safety from the user, which can lead to injury if they don’t under­stand the haz­ards involved. Some product-spe­cif­ic stand­ards

EMC

Why Conventional EMC Testing is Insufficient for Functional Safety

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At the recent PSES Sym­posi­um, I atten­ded a couple of inter­est­ing work­shops on EMC and Func­tion­al Safety. One was called “Work­shop on EMC & Func­tion­al Safety” presen­ted by Keith Arm­strong, Bill Radasky and Jacques Delaballe. The oth­er was a paper present­a­tion called “Why Con­ven­tion­al EMC Test­ing is Insuf­fi­cient for Func­tion­al Safety” presen­ted by Keith Arm­strong.

For read­ers who are new to the idea of Func­tion­al Safety, this field deals