Per high-voltage isolation requirement of IEEE 802.3, 2000, Ethernet front-end (media-side) must meet at least (any) one of the following three tests:
a) 1500 V rms at 50 Hz to 60 Hz for 60 s, applied as specified in Section 5.3.2 of IEC 60950, 1991 b) 2250 Vdc for 60 s, applied as specified in Section 5.3.2of IEC 60950, 1991 c) a sequence of ten 2400 V impulses of alternating polarity, applied at intervals not less than 1 s. The shape of the impulses shall be 1.2/50 us (1.2 us virtual front time, 50 us virtual time of half value), as defined in IEC 60060. There shall be no insulation breakdown, as defined in Section 5.3.2 of IEC 60950, 1991, during the test. The resistance after the test shall be at least 2 MOhm, measured at 500 Vdc. Neven > > Hi Forum, > Are there any ethernet and PCB safety requirements, ie are there rules like > those for the modem side of things (isolation in particular) or is the > transformer sufficient? > > Kind Regards > Alex McNeil > Principal Engineer > Tel: +44 (0)131 479 8375 > Fax:+44 (0)131 479 8321 > email: [email protected] > > > ------------------------------------------- > 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: > Ron Pickard: [email protected] > Dave Heald: [email protected] > > For policy questions, send mail to: > Richard Nute: [email protected] > Jim Bacher: [email protected] > > Archive is being moved, we will announce when it is back on-line. > All emc-pstc postings are archived and searchable on the web at: > http://www.ieeecommunities.org/emc-pstc 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: Ron Pickard: [email protected] Dave Heald: [email protected] For policy questions, send mail to: Richard Nute: [email protected] Jim Bacher: [email protected] Archive is being moved, we will announce when it is back on-line. All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc
