Evening
Getting a bit out-of-date in this area, but there is quite a lot in Clause 9 “Control circuits and control functions” of 60204-1; 2006 as amended, and that also refers to the safety-related aspects of control functions given in ISO 13849-1, ISO 13849-2 and IEC 6206 (none of which I have access to) However, Clause 9.2 of Clause 9 defines 3 categories of stop functions: – stop category 0: stopping by immediate removal of power to the machine actuators (i.e. an uncontrolled stop – see 3.56); – stop category 1: a controlled stop (see 3.11) with power available to the machine actuators to achieve the stop and then removal of power when the stop is achieved; – stop category 2: a controlled stop with power left available to the machine actuators. Clause 9 then goes on to outline the above in more detail. Maybe the latest edition of NFPA 79, which very much mirrors 60204-1, has similar or more info? Otherwise you might need to refer to the other ISO/IEC standards mentioned above. Joh E Allen W.London, UK From: Doug Powell [mailto:doug...@gmail.com] Sent: 27 June 2016 19:50 To: EMC-PSTC@LISTSERV.IEEE.ORG Subject: [PSES] EMO vs EPO All, Is there an official fine point distinction between Emergency Off (EMO), Emergency Power Off (EPO) and Emergency Stop or are they all equivalent and interchangeable terms? To my thinking, if there is a distinction, it would seem that Emergency Stop is related to mechanical hazards or moving parts, EPO is related to electrical hazards and EMO would be a general "catch all" acronym for any type of hazard whether mechanical, electrical, radiation, chemical, etc. Thanks! Doug -- Douglas E Powell doug...@gmail.com http://www.linkedin.com/in/dougp01 - ---------------------------------------------------------------- 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 <emc-p...@ieee.org> 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 <sdoug...@ieee.org> Mike Cantwell <mcantw...@ieee.org> For policy questions, send mail to: Jim Bacher <j.bac...@ieee.org> David Heald <dhe...@gmail.com> - ---------------------------------------------------------------- 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 <emc-p...@ieee.org> 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 <sdoug...@ieee.org> Mike Cantwell <mcantw...@ieee.org> For policy questions, send mail to: Jim Bacher: <j.bac...@ieee.org> David Heald: <dhe...@gmail.com>
