That seems to make more sense. I don’t know anything about X-ray requirements but the FDA requirements laser interlocks are not specific, only referring to “interlocks”. -Dave
From: MIKE SHERMAN [mailto:[email protected]] Sent: Tuesday, February 05, 2019 12:27 PM To: [email protected] Subject: Re: [PSES] A question about FDA language and interlocking devices Doug -- "knife-edge and finger stock" sounds more like the gasketing around the door to keep the radiation inside. I think you'll find similar gasketing on doors to EMC chambers. I've not heard of this term applied to interlock switches. Mike Sherman Graco Inc. On February 5, 2019 at 10:35 AM Doug Nix <[email protected]<mailto:[email protected]>> wrote: Colleagues, I had a question come my way yesterday that I need a little help with. Here’s the question: I have a customer that produces X-ray equipment. The FDA requires that the door that gives access to the X-ray source must have an interlock with a ‘knife-edge and finger stock’ type connection. Also the FDA mentions that interlocks should be of conventional design. What is understood by “conventional design”? My reading on this requirement is that any conventional electromechanical interlocking device like this: [Image result for keyed interlock switch images] will meet the basic requirements as described by the FDA as “knife-edge and fingerstock” connection, but I am concerned that this may not be at all what is meant. As always, any guidance you can offer will be welcomed and appreciated! Best, Doug Nix [email protected]<mailto:[email protected]> +1 (519) 729-5704 - ---------------------------------------------------------------- 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]<mailto:[email protected]>> All emc-pstc postings are archived and searchable on the web at: http://www.ieee-pses.org/emc-pstc.html Attachments are not permitted but the IEEE PSES Online Communities site at http://product-compliance.oc.ieee.org/ can be used for graphics (in well-used formats), large files, etc. Website: http://www.ieee-pses.org/ Instructions: http://www.ieee-pses.org/list.html (including how to unsubscribe)<http://www.ieee-pses.org/list.html> List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas <[email protected]<mailto:[email protected]>> Mike Cantwell <[email protected]<mailto:[email protected]>> For policy questions, send mail to: Jim Bacher <[email protected]<mailto:[email protected]>> David Heald <[email protected]<mailto:[email protected]>> - ---------------------------------------------------------------- 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]<mailto:[email protected]>> All emc-pstc postings are archived and searchable on the web at: http://www.ieee-pses.org/emc-pstc.html Attachments are not permitted but the IEEE PSES Online Communities site at http://product-compliance.oc.ieee.org/ can be used for graphics (in well-used formats), large files, etc. Website: http://www.ieee-pses.org/ Instructions: http://www.ieee-pses.org/list.html (including how to unsubscribe)<http://www.ieee-pses.org/list.html> List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas <[email protected]<mailto:[email protected]>> Mike Cantwell <[email protected]<mailto:[email protected]>> For policy questions, send mail to: Jim Bacher <[email protected]<mailto:[email protected]>> David Heald <[email protected]<mailto:[email protected]>> - ---------------------------------------------------------------- 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: http://www.ieee-pses.org/emc-pstc.html Attachments are not permitted but the IEEE PSES Online Communities site at http://product-compliance.oc.ieee.org/ can be used for graphics (in well-used formats), large files, etc. Website: http://www.ieee-pses.org/ Instructions: http://www.ieee-pses.org/list.html (including how to unsubscribe) List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas <[email protected]> Mike Cantwell <[email protected]> For policy questions, send mail to: Jim Bacher: <[email protected]> David Heald: <[email protected]>
