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There is a very important aspect of this comparison that I have not seen addressed in this discussion.
EN 55011 has both Group 1 and Group 2. The EN 55011, Group1 limits are identical to EN 55022 limits. In fact, this even follows for both Class A and Class B. EN 55011, Group 2 includes ISM “forgiveness” bands. That is, certain frequencies, basically harmonics of 13.56 MHz, have relieved limits (some are unlimited). The definition for a product to fall into EN 55011, Group 2 is a little complicated but basically says that the product must use RF as an output. In other words, just clock or operating (like switching) frequencies are not considered in Group 2. My 2 cents. Regards, Bryan Hardman _____ From: owner-emc-p...@listserv.ieee.org mailto:owner-emc-p...@listserv.ieee.org] On Behalf Of melli...@tycoint.com Sent: Monday, April 25, 2005 8:55 AM To: neil.bar...@e2v.com; melli...@tycoint.com; emc-p...@ieee.org Subject: RE: Differences between 55011 / 55022 Hi Neil, It helps a great deal, along with the other responses that I have received. The general consensus seems to be "similar, yet different". Not similar enough for a presumption of conformity. This is generally what I anticipated. I appreciate the responses from all. Best regards, Mac From: Barker, Neil [mailto:neil.bar...@e2v.com] Sent: Monday, April 25, 2005 10:52 AM To: 'melli...@tycoint.com'; emc-p...@ieee.org Subject: RE: Differences between 55011 / 55022 Mac, There is a good deal of similarity between the standards, but EN55011 is rather more complex. That said, if equipment passes EN55022, then it is very likely to pass EN55011, but the converse (which is what you asked) is not necessarily true. The difficulty arises because EN55011 effectively notches the designated ISM frequencies, so you could have equipment that happened to have spurious radiation at these frequencies that would not pass EN55022. Because EN55022 is a continuous limit, equipment that passes that limit would by default pass EN55011. This conflict works the other way around for magnetic radiation, becuase EN55022 has no limit for this, whereas EN55011 does include a limit for magnetic radiation. I hope this helps. Best regards, Neil R. Barker C.Eng. MIEE FSEE MIEEE Manager Compliance Engineering e2v technologies (uk) ltd 106 Waterhouse Lane Chelmsford Essex CM1 2QU UK Tel: +44 (0)1245 453616 Fax: +44 (0)1245 453410 e-mail: neil.bar...@e2v.com Web: http://www.e2v.com <http://www.e2v.com/> From: melli...@tycoint.com [mailto:melli...@tycoint.com] Sent: 25 April 2005 14:02 To: emc-p...@ieee.org Subject: Differences between 55011 / 55022 Hello group members, Recently one of our suppliers sent us a test report that demonstrated radiated emission compliance of ITE equipment to EN 55011. This equipment is ITE intended for use in a commercial environment. We test this device to EN55022 Class A. We do not have a copy of EN 55011 handy. If necessary, I know we could purchase one. I am looking for just a general idea of whether or not the differences between EN55011 / EN55022 are significant. It appears that from what I can find on the web, the limits are the same, but not sure about setup requirements, etc... A lot of websites seem to refer to the two standards together as if they were similar at the least. In general, if an ITE device passes EN 55011 would it "pass" EN 55022? Best Regards, Mac Elliott Tyco Safety Products / Sensormatic 6600 Congress Avenue Boca Raton, FL 33487 (561)-912-6462 melli...@tycoint.com ---------------------------------------------------------------- This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. Website: http://www.ieee-pses.org/ To post a message to the list, send your e-mail to emc-p...@ieee.org Instructions: http://listserv.ieee.org/listserv/request/user-guide.html List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas emcp...@ptcnh.net Mike Cantwell mcantw...@ieee.org For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstcTitle: Message
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There is a very important aspect of this comparison that I have not seen addressed in this discussion.
EN 55011 has both Group 1 and Group 2.
The EN 55011, Group1 limits are identical to EN 55022 limits. In fact, this even follows for both Class A and Class B. EN 55011, Group 2 includes ISM “forgiveness” bands. That is, certain frequencies, basically harmonics of 13.56 MHz, have relieved limits (some are unlimited).
The definition for a product to fall into EN 55011, Group 2 is a little complicated but basically says that the product must use RF as an output. In other words, just clock or operating (like switching) frequencies are not considered in Group 2.
My 2 cents. Regards, Bryan Hardman
From:
owner-emc-p...@listserv.ieee.org [mailto:owner-emc-p...@listserv.ieee.org] On Behalf Of melli...@tycoint.com
Hi Neil,
It helps a great deal, along with the other responses that I have received.
The general consensus seems to be "similar, yet different". Not similar enough for a presumption of conformity. This is generally what I anticipated.
I appreciate the responses from all.
Best regards,
Mac
To post a message to the list, send your e-mail to emc-p...@ieee.org Instructions: http://listserv.ieee.org/listserv/request/user-guide.html List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas emcp...@ptcnh.net Mike Cantwell mcantw...@ieee.org For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc |
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