Group: Check my interpretation of EN 61000-6-2:1999 Immunity DC power Port Table 3 Note 3. This is with reference to an industrial application with a DC power input. Intended to be either supplied with an AC-DC power supply (`power adapter') or a distributed DC power from a distant AC-DC source located in the building.
The way I read the chart is you test through the AC-DC power supply (`power adapter') +/- 500 volts surge and +/- 2000 EFT and only if you connect to cables =>10 meters between the AC-DC supply and the DC input. IF I AM READING THIS RIGHT: 1. When <10 meters, are they expecting the surge and EFT tests defined for the AC port will be imposed in the course of EMC testing anyway ? I would be doing this test. Although, you could be using a supply with all the testing and CE mark certs available encouraging some to conclude this is already covered so no need to retest. 2. Are they expecting you to connect >10 meters of cable for the test? This would not be real. 3. The remaining question, IF I AM INTERPRETING IT CORRECTLY, why only +/- 500 volts surge on the AC input ? On the AC Power: ±2-kV line-to-earth; ±1-kV line-to-line surge is required. Your input will be appreciated! Best regards, Terry J. Meck Senior Compliance/Test Engineer tjm...@accusort.com Accu-Sort Systems Inc. 511 School House Rd. Telford, PA 18969-1196 USA ------------------------------------------- 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: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Michael Garretson: pstc_ad...@garretson.org Dave Heald davehe...@mediaone.net 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.rcic.com/ click on "Virtual Conference Hall,"
