On Thu, 23 Oct 2014 20:40:14 +0000, "Crane, Lauren" <[email protected]> wrote:
> I am doing a deep dive into ISM equipment requirements for the first time. I > *think* I see a difference in interpretation of ISM equipment between the US > and EU regulations. > > US (FCC Part 18) seems to limit the ISM concept to equipment that essentially > uses radio frequency to do something to a target object or work piece. This > would exclude, for example, radio frequency energy generated by a > microprocessor clock circuit in an industrial machine's controller (which > instead are considered unintentional radiators within scope of FCC Part 15) > > EU (e.g., EN 55011) by creating the concept of Group1 and Group2 appears to > also cover (in Group 1) *any* generated radio frequency energy that is used > by the equipment. This would include, for example, radio frequency energy > generated by a microprocessor clock circuit in an industrial machine's > controller. > > Have I got this right? CISPR 11 / EN 55011 defines "ISM equipment and appliances" as "equipment or appliances designed to generate and/or use locally radio-frequency energy for industrial, scientific, medical, domestic or similar purposes, **excluding applications in the field of telecommunications and information technology and other applications covered by other CISPR publications**". I believe microprocessor clocks are certainly for information technology and will not make the equipment ISM equipment, but in these days, many equipment also use switching power converters. I guess one of the main source of the confusion is the name of "ISM equipment" itself, which suggests any industrial equipment are covered. Regards, Tom -- Tomonori Sato <[email protected]> URL: http://homepage3.nifty.com/tsato/ - ---------------------------------------------------------------- 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]>
