Hi Paul, I am assuming that you are speaking about telecommunications switching equipment. The upper end of -72 volts supports -60V battery plant found in a few German offices with (I believe) Siemens switches. There is every indication that these systems will not "spread" to other offices and global standardization on a -48V battery plant will occur through attrition. Many companies start down the road of supporting -60V plant equipment until they realize the additional cost involved in manufacturing/design of a system with TNV2/Hazardous Secondary (depends who you talk to) input voltage. Hope this answers your question. Regards, Dave Spencer Oresis Communications
-----Original Message----- From: Denomme, Paul S. [mailto:paul.deno...@viasystems.com] Sent: Friday, May 04, 2001 8:37 AM To: "EMC-PSTC (E-mail)" < Subject: Is 36-72VDC power supply input still valid? I have recently had a discussion with someone who stated that people are no longer specifying a 36-72V input, and that they are specifying 42-56V because it is more standard for todays applications? Does anyone know where the 36-72V input requirement originated and where and when we still need to design to the old specification of 36-72V? Any input would be greatly appreciated. Regards, Paul S. Denomme Viasystems ------------------------------------------- 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," ------------------------------------------- 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,"
