Doug Frazee wrote: >Several of our customers have inquired about required CE testing on >systems that are powered by low voltage DC from CE approved power >supplies. They feel that additional tests are not required. I agree as
>far as the Low Voltage Directive is concerned, but for the EMC directive, >I am advising that no testing be waived as compliance cannot be >guaranteed when configured with a noisy device. Have there been any >rulings on this issue? Any differing opinions? >Doug Frazee >EMC compliance engineer I perfectly agree with Doug. Just take a look to the EN50082 where immunity limits for DC Supply ports are specified . EN50081 specifies emmision limits for "supply". It does not make anny difference wether they are AC or DC. Regards George ******************************************************************** * Dr. Georg M. Dancau * HAUNI MASCHINENBAU AG * * g.m.dan...@ieee.org * EMC Lab Dept.177 * * 100536.2...@compuserve.com * Kampchaussee 8..32 * * TEL: +49 40 7250 2102 * 21033 Hamburg * * FAX: +49 40 7250 3801 * Germany * ******************************************************************** * home: 100536.2...@compuserve.com * Lohbruegger Landstr. 82 * * Tel: +49 40 738 51 07 * 21031 Hamburg * * Fax: +49 40 730 11 99 * Germany * ********************************************************************
