Hi All, Last week a friend asked me a safety question, not being a safety expert I thought I would try the question on this group.
The question has to do with EN 60204‑1:2018 relating to a piece of semiconductor processing equipment. The equipment has an EMO (emergency off button) that in an orderly fashion shuts the equipment down. The EMO control has duplicated signals with feedback to control the main contactor to shut down power. The contactor itself is not duplicated, however power can be shut down by the manual switch. If power is shut down this way there is no safety issue at all, but product in the machine (a wafer) may be damaged and restart may be complicated. Does this arrangement comply with EN 60204‑1:2018? Seems to me that it does but would appreciate input from others Doug Smith Sent from my iPhone IPhone: 408-858-4528 Office: 702-570-6108 Email: [email protected] Website: http://dsmith.org - ---------------------------------------------------------------- This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. To post a message to the list, send your e-mail to [email protected] All emc-pstc postings are archived and searchable on the web at: https://www.mail-archive.com/[email protected]/ Website: https://ewh.ieee.org/soc/pses/ Instructions: https://ewh.ieee.org/soc/pses/list.html (including how to unsubscribe) List rules: https://ewh.ieee.org/soc/pses/listrules.html For help, send mail to the list administrators: Mike Sherman at: [email protected] Rick Linford at: [email protected] For policy questions, send mail to: Jim Bacher: <[email protected]> _________________________________________________ To unsubscribe from the EMC-PSTC list, click the following link: https://listserv.ieee.org/cgi-bin/wa?SUBED1=EMC-PSTC&A=1
