I don't think conducted emissions on the 24V input would be required but CISPR 11 is a system test and should include the 24V power distribution system which I assume has an AC Mains input which would be tested for conducted emissions.
The Other Brian From: [email protected] [mailto:[email protected]] On Behalf Of Birdsall, Gail Sent: Friday, June 15, 2012 1:42 PM To: [email protected] Subject: CISPR 11 Question Dear Industry Experts, Hach Company manufactures industrial test and measurement equipment and for the purpose of EMC testing we test to the EN 61326-1 EMC standard. This test standard specifies CISPR 11. The EN61326-1 standard simply states... The equipment shall be classified and respective information is provided per the applicable group and class as specified within CISPR 11, Clause 4. (Our equipment however, does not use ISM frequencies.) Our equipment is operated from a mains derived 24V power distribution system. CISPR 11 has emission limits for conducted RF for ac mains power ports, but states, "NOTE 1: Limits only apply to low voltage ac mains input ports." My question is whether conducted RF emissions on non mains ports is required or not for equipment connected to a 24V power distribution network by either EN61326-1 or CISPR 11 standards. We can nowhere find that it is a requirement. Your assistance is appreciated. Gail Birdsall Hach Compliance Dept. Manager w.970.663.1377 ext 2682 Hach Company | www.hach.com<http://www.hach.com> [email protected]<mailto:[email protected]> Please be advised that this email may contain confidential information. If you are not the intended recipient, please notify us by email by replying to the sender and delete this message. The sender disclaims that the content of this email constitutes an offer to enter into, or the acceptance of, any agreement; provided that the foregoing does not invalidate the binding effect of any digital or other electronic reproduction of a manual signature that is included in any attachment. - ---------------------------------------------------------------- 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://listserv.ieee.org/request/user-guide.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]>> ________________________________ LECO Corporation Notice: This communication may contain confidential information intended for the named recipient(s) only. If you received this by mistake, please destroy it and notify us of the error. Thank you. - ---------------------------------------------------------------- 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://listserv.ieee.org/request/user-guide.html 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]>
