In the province of Québec, they use stoplights that have shape coding. The
lights are mounted horizontally above the roadway. the left and right ends have
larger, circular, red lights. The amber light is diamond shaped and immediately
to the right of the left-most red light. The green light is
that the single multi-color LED lamp
would not be a preferred option.
Jim Hulbert
From: John Woodgate
Sent: Friday, June 23, 2023 6:22 PM
To: EMC-PSTC@LISTSERV.IEEE.ORG
Subject: [EXTERNAL] Re: [PSES] Machine status visual Indicators
Good point. That's how drivers can cope
Thank you all for your comments. The color blind aspect is important. Thanks
all.Sent from my T-Mobile 5G Device
Original message From: Steve Brody Date:
6/23/23 2:52 PM (GMT-05:00) To: EMC-PSTC@LISTSERV.IEEE.ORG Subject: [PSES]
Machine status visual Indicators
Good point. That's how drivers can cope.
==
Best wishes John Woodgate OOO-Own Opinions Only
www.woodjohn.uk
Rayleigh, Essex UK
I hear, and I forget. I see, and I remember. I do, and I understand.
Xunzi (340 -
Hi Steve! I don't have a copy of that standard but I'm picturing the
red/yellow/green towers on things like manufacturing floor hipot testers.
Have you considered the colorblind user who might not be able to discern
yellow from red, but on a 'stoplight'-like tower, can at least use the
Steve,
I recommend that you include this concern in your Risk Assessment to
determine whether the LED color is critical to safety or not. You can then
record your level of risk and compare it to your risk tolerance. Include
all possible failure modes, such as LED failure, incorrect polarity,
Go for it!
Rich
From: Steve Brody
Sent: Friday, June 23, 2023 11:52 AM
To: EMC-PSTC@LISTSERV.IEEE.ORG
Subject: [PSES] Machine status visual Indicators
Experts,
I have a client who would like to use a single LED capable of multiple colors
instead of a mutli-lamp light tower
Experts,
I have a client who would like to use a single LED capable of multiple colors
instead of a mutli-lamp light tower that we are used to seeing.
It can produce the required colors in accordance with 60204-1, Table 4.
I have read through 60204-1 (machinery) safety and 61310-1
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