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
