All,
My question is probably philosophical.
With the advent of Safety rated PLCs, Safety Relays, and other solid
state and programmable safety devices in certified and listed products, are
we at risk of becoming over reliant on automated safety systems. I'm
thinking in terms of IEC 61508, ISO 121
I think it's not safe to generalize. Attitudes and forethought vary so
much among designers. For me, whatever automated safety measures are
provided, there must be 'last chance' protection in hardware, such as
fuses.
=
:00 AM
To: EMC-PSTC@LISTSERV.IEEE.ORG
Subject: [PSES] Over Reliance on Automated Safety Controls (Friday question)
All,
My question is probably philosophical.
With the advent of Safety rated PLCs, Safety Relays, and other solid state and
programmable safety devices in certified and
d Eckert
The opinions expressed are my own and do not necessarily represent those of my
employer, humanity in general, or the large carnivores of western Washington.
From: Douglas E Powell
Sent: Friday, September 3, 2021 7:00 AM
To: EMC-PSTC@LISTSERV.IEEE.ORG
Subject: [EXTERNAL] [PSES] Over Relian
ty in general, or the large carnivores of western
> Washington.
>
>
>
>
>
> *From:* Douglas E Powell
> *Sent:* Friday, September 3, 2021 7:00 AM
> *To:* EMC-PSTC@LISTSERV.IEEE.ORG
> *Subject:* [EXTERNAL] [PSES] Over Reliance on Automated Safety Controls
> (Friday question)
>
and do not necessarily represent those
> of my employer, humanity in general, or the large carnivores of western
> Washington.
>
>
>
>
>
> *From:* Douglas E Powell
> *Sent:* Friday, September 3, 2021 7:00 AM
> *To:* EMC-PSTC@LISTSERV.IEEE.ORG
> *Subject:* [EXTERNAL
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