I received a number of replies to my query. It appears there is some justification for the requirement having to do with accessories, fire enclosures, material construction, and source of power. Most interesting was the pointer to the UL PAG that highlights the OSM Decision regarding this issue.
My issue was a bit confusing because I have a number of products similar in nature where some have the statements in the manual, some have a specific power supply identified on the product label, and some have neither of these. Ah, the joys of inherited products and approvals. It would appear I have some cleanup to do. Thank you to all who commented. As always, your insights and information are invaluable. Best regards, Scott [email protected] wrote: I suppose that the following might be referable. CENELEC OSM Decision Sheet (CCA): 1.7.2 (99/2), 4.7 (95/21), 4.7.3.2 (95/24) 1. 7. 2 A Class III equipment with an enclosure made of HB material and using a non-special connector for the AC/DC input has to have a marking stating the following: "For use only with power supply MANUFACTURER, MODEL" This statement shall also be in the user-instructions. Alternative marking: "Use only power supplies listed in the user instructions" or "For applicable power supplies see user instructions" This statement shall also be in the user-instructions. The user instructions must then have a listing of manufacturer and model of the relevant power supplies. Method 2 of 4.7.1 of EN 60950:2000 is recommended. Also, in the UL PAG: Sub-clause 4.7.2.2 clearly allows accessories and peripheral devices to be constructed of HB material if the device is supplied by a Limited Power Source (LPS) as defined in sub-clause 2.5. sub-clause 2.5 provides several options for defining an LPS, a couple of which lend themselves to this host/accessory scenario. If the accessory has a correlation marking or instruction which specifies its use with specific host equipment with known LPS output ports, the combination of the host and accessory as a system can be considered and HB material used, i.e., option 3. Best regards, Anderson -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Scott Douglas Sent: Thursday, September 17, 2009 9:08 AM To: 'EMC PSTC' Subject: Looking for Source of Requirement To All, I find this statement is a user manual: "This product is intended to be supplied by a Listed Power Unit, marked with "Limited Power Source," "LPS" and "Class II" on the unit, and output rated ..." The product is usually approved to either ITE (60950) or to A/V (60065) standards. I am curious to know where this requirement comes from, specifically page, paragraph, and rule. I looked in both and did not find it. Can anyone point me to a source? As always, thanks in advance for your help. Kind regards, Scott - ---------------------------------------------------------------- This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. To post a message to thelist, send your e-mail to <[email protected]> <mailto:[email protected]> All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc Graphics (in well-used formats), large files, etc. can be posted to that URL. 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]> CONFIDENTIALITY NOTE : The information in this e-mail is confidential and privileged; it is intended for use solely by the individual or entity named as the recipient hereof. Disclosure, copying, distribution, or use of the contents of this e-mail by persons other than the intended recipient is strictly prohibited and may violate applicable laws. If you have received this e-mail in error, please delete the original message and notify us by return email or collect call immediately. Thank you. HTC Corporation - 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.ieeecommunities.org/emc-pstc Graphics (in well-used formats), large files, etc. can be posted to that URL. 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]>
