You *could be* right. I've been in this situation several times. Let me explain.
My golden rule is - the burden of power supply approvals should be on the mfr. I don't negotiate on this point ever. Two things could happen if you don't follow this rule: 1. You can certainly go for just one approval to include the system and all assemblies. The power supply will have to go through some testing on it's own and be part of the system approval. BUT, if your company goes through the approval process for the system with said power supply, your company is at the mercy of any changes the power supply company. That's unless your company has set up an ECO review process with the power supply vendor. That is not only difficult to set up, but difficult to maintain. IOW, your company owns the approval, but it doesn't own the mfr-ing/engineering process. That's bad and that is precisely where you can get dinged on a factory inspection. 2. Your company decides to use the power supply in a second product. The power supply will have to retested (even though it's been tested before) all over again. The approval for the application of the power supply in the first product does not transfer to the second product. It's best to have the power supply companies get the approvals for your application. Power supply companies usually have a good repoire with NRTLs. It's far better to have them do an amendment to the file of the existing power supply of the modification to the power supply for your specific application and hold their feet to the fire for it, then have you in a position of compromise and possible stop ship with a process that's out of your control. I'm of course talking worst case. It's all dependent upon your relationship with the power supply vendor and the size of the vendor. Small power supply companies will bend over backwards to keep you happy. OTOH, if the power supply vendor has you third in line because of some 10,000 unit order allocation to another of their customers, you might want to give this some serious thought. just my opinion ... - Doug McKean ------------------------------------------- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: [email protected] with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Michael Garretson: [email protected] Dave Heald [email protected] For policy questions, send mail to: Richard Nute: [email protected] Jim Bacher: [email protected] All emc-pstc postings are archived and searchable on the web at: No longer online until our new server is brought online and the old messages are imported into the new server.
