RE: Optical Isolators
Hello everybody, I' m looking for an optocoupler that complies with UL 1577 Optical isolators standard double-protection requirements. I' ve searched the UL yellow book and there are 2 companies that list this type of optos: Lite-on Electronics Taiwan and Kodenshi Japan. I've tried to keep in touch with Kodenshi Japan via Internet and e-mail without any luck. Please, did anybody out there contact Kodenshi Japan? I' m very interested to get a contact name or a functional e-mail address from Kodenshi. I appreciate any input that can solves this issue and thank you in advance for any help, Regards, Carmen Filimon Leitch Technology Int'l Inc., Toronto -Original Message- From: goedd...@sensormatic.com [SMTP:goedd...@sensormatic.com] Sent: Wednesday, November 08, 2000 1:49 PM To: emc-p...@majordomo.ieee.org Subject: RE: Optical Isolators There are several companies that get both UL and European approvals. The VDE types generally have an additional extension on the part number. Two sources that may fit your need are ISOCOM and QT Optoelectronics. James Goedderz Sensormatic -- From: marti...@appliedbiosystems.com[SMTP:marti...@appliedbiosystems.com] Reply To: marti...@appliedbiosystems.com Sent: Tuesday, November 07, 2000 8:18 PM To: emc-p...@majordomo.ieee.org Subject:Optical Isolators We are a manufacturer of Laboratory Equipment. We evaluate our products to UL 3101, CSA 1010.1 and EN 61010-1. We purchase a primary component that relies on optical isolators to separate primary from secondary. It seems that these optical isolators only have UL approvals. Are there any additional requirements for European approval?If so, what are they? Are there optical isolators that have both UL and European agency approvals? All responses are appreciated. Regards Joe Martin EMC/Product Safety Engineer marti...@appliedbiosystems.com --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. 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: Jim Bacher: jim_bac...@mail.monarch.com Michael Garretson:pstc_ad...@garretson.org For policy questions, send mail to: Richard Nute: ri...@ieee.org --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. 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: Jim Bacher: jim_bac...@mail.monarch.com Michael Garretson:pstc_ad...@garretson.org For policy questions, send mail to: Richard Nute: ri...@ieee.org --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. 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: Jim Bacher: jim_bac...@mail.monarch.com Michael Garretson:pstc_ad...@garretson.org For policy questions, send mail to: Richard Nute: ri...@ieee.org
Flammability of Foam Filters
According to UL 1950, sub clause 4.4.3.6, foam air filters must meet the flammability of Class V2 or better, or HF-2 or better. This rating in accordance with UL 94. Recently one of our suppliers has suggested the use of Class 2 filter material in accordance with UL 900 flammability. Additionally I have been told that filters that comply with Class 2 requirements are considered to meet the requirements of sub clause 4.4.3.6. My questions are: 1. Is Class 2 similar to V-2 or HF-2? 2. Can UL 900 Class 2 filters be used to satisfy sub clause 4.4.3.6? 3. Is UL 900 Performance of Air filters applicable to ITE equipment per UL 1950? Thanks Rick Busche rbus...@es.com --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. 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: Jim Bacher: jim_bac...@mail.monarch.com Michael Garretson:pstc_ad...@garretson.org For policy questions, send mail to: Richard Nute: ri...@ieee.org
Re: Directive 96/29/euratom
Hello Bob, I put the term into the Europa Search Tool and the responses indicate that the date is 13 MAY 1996. The Europa site yielded a lot of responses that might be of use to you. Give it a try. (You can find it on the Safety Link). Regards, Art Michael * * * * * * * * * * * * * * * * * * * * * * * International Product Safety Bookshop * * Check out our current offerings! * * http://www.safetylink.com/bookshop.html * * * * Now offering BSI's Books Reports* * including, World Electricity Supplies * * * * Another service of the Safety Link* * www.safetylink.com * * * * * * * * * * * * * * * * * * * * * * * -- On Wed, 8 Nov 2000, Chaplis, Bob wrote: Hello, Can anyone tell me when directive 96/29/EURATOM of 13 May 96 was published in the European Journal and would anybody have a copy of the directive that they would be willing to send me. I would also like to know what the standard is ( if one ) that the EU has published as acceptable to show compliance to that directive. Any help would be appreciated. Thank You Bob Chaplis Genrad. --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. 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: Jim Bacher: jim_bac...@mail.monarch.com Michael Garretson:pstc_ad...@garretson.org For policy questions, send mail to: Richard Nute: ri...@ieee.org
Directive 96/29/euratom
Hello, Can anyone tell me when directive 96/29/EURATOM of 13 May 96 was published in the European Journal and would anybody have a copy of the directive that they would be willing to send me. I would also like to know what the standard is ( if one ) that the EU has published as acceptable to show compliance to that directive. Any help would be appreciated. Thank You Bob Chaplis Genrad. --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. 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: Jim Bacher: jim_bac...@mail.monarch.com Michael Garretson:pstc_ad...@garretson.org For policy questions, send mail to: Richard Nute: ri...@ieee.org
RE: Standards change - spacings on switches?
Steve and group, We too have recently been impacted by this problem. In our case the manufacturer is Carlingswitch. It apparently only affects a portion of their switches. They told us that it affects four different switches that we are using. We have asked them for additional information and they have not been willing to provide any. They did not even say it has to do with the spacings, we just figured that it must be a change to the spacing requirements. If some VDE standard is changing shouldn't it affect other switch manufacturers with VDE approvals? Why is this apparently affecting only Carlingswitch, or have the other manufacturers just chosen not to inform their customers? I too would be very interested in finding out more about this change. Kurt Andrews Compliance Engineer Tracewell Systems, Inc. 567 Enterprise Drive Westerville, Ohio 43081 voice: 614.846.6175 toll free: 800.848.4525 fax: 614.846.7791 http://www.tracewellsystems.com/ http://www.tracewellsystems.com/ -Original Message- From: Steven Brody [SMTP:sbr...@prodigy.net] Sent: Wednesday, November 08, 2000 2:27 PM To: emc-p...@majordomo.ieee.org Subject:Standards change - spacings on switches? Dear all, I was recently told by a well known switch manufacturer that their one of their products which was UL/CSA/VDE approved, would no longer be available due to a VDE standards change that impacted the spacings between the contacts. However, they were not able to tell me which standard changed, or what the change was. I assume the spacing requirement has increased as a decrease would have no impact. If anyone has any information about what standard changed and what the changes were I would appreciate it. Thanks, Steve Brody NESLAB Instruments, Inc. Email - steve.br...@neslab.com or sbr...@prodigy.net --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. 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: Jim Bacher: jim_bac...@mail.monarch.com Michael Garretson:pstc_ad...@garretson.org For policy questions, send mail to: Richard Nute: ri...@ieee.org --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. 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: Jim Bacher: jim_bac...@mail.monarch.com Michael Garretson:pstc_ad...@garretson.org For policy questions, send mail to: Richard Nute: ri...@ieee.org
Standards change - spacings on switches?
Dear all, I was recently told by a well known switch manufacturer that their one of their products which was UL/CSA/VDE approved, would no longer be available due to a VDE standards change that impacted the spacings between the contacts. However, they were not able to tell me which standard changed, or what the change was. I assume the spacing requirement has increased as a decrease would have no impact. If anyone has any information about what standard changed and what the changes were I would appreciate it. Thanks, Steve Brody NESLAB Instruments, Inc. Email - steve.br...@neslab.com or sbr...@prodigy.net --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. 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: Jim Bacher: jim_bac...@mail.monarch.com Michael Garretson:pstc_ad...@garretson.org For policy questions, send mail to: Richard Nute: ri...@ieee.org
RE: Optical Isolators
There are several companies that get both UL and European approvals. The VDE types generally have an additional extension on the part number. Two sources that may fit your need are ISOCOM and QT Optoelectronics. James Goedderz Sensormatic -- From: marti...@appliedbiosystems.com[SMTP:marti...@appliedbiosystems.com] Reply To: marti...@appliedbiosystems.com Sent: Tuesday, November 07, 2000 8:18 PM To: emc-p...@majordomo.ieee.org Subject: Optical Isolators We are a manufacturer of Laboratory Equipment. We evaluate our products to UL 3101, CSA 1010.1 and EN 61010-1. We purchase a primary component that relies on optical isolators to separate primary from secondary. It seems that these optical isolators only have UL approvals. Are there any additional requirements for European approval?If so, what are they? Are there optical isolators that have both UL and European agency approvals? All responses are appreciated. Regards Joe Martin EMC/Product Safety Engineer marti...@appliedbiosystems.com --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. 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: Jim Bacher: jim_bac...@mail.monarch.com Michael Garretson:pstc_ad...@garretson.org For policy questions, send mail to: Richard Nute: ri...@ieee.org --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. 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: Jim Bacher: jim_bac...@mail.monarch.com Michael Garretson:pstc_ad...@garretson.org For policy questions, send mail to: Richard Nute: ri...@ieee.org
RE: Coaxial cable
Actually it is called a Z fold as it imitates a squashed letter z when folded. The foil is folded that way so it makes continuous circumpherential contact. Not all manufacturers employ a Z fold or equivalent method and their coax cable's performance is degraded. The Z fold is much better than an overlapping non-contacting or a spiraling foil. Hans --- Gary McInturff gary.mcintu...@worldwidepackets.com wrote: Nicely put, but I want to emphasize one point. The foil in most cables doesn't have a metal to metal contact. Where the foil overlaps itself the polyester on the underside is what is in contact with the foil outside. The type cable you are mentioning is called ane fold if I remember correctly, but I don't kno why. A lot of folks don't realize that they are not getting foil to foil contact, just and overlap of material. Gary -Original Message- From: jrbar...@lexmark.com [mailto:jrbar...@lexmark.com] Sent: Tuesday, November 07, 2000 8:58 AM To: sergioro...@siemens.com.br; emc-p...@ieee.org Subject: Re: Coaxial cable Sergio, A foil braid shield is quite common on high-speed cables. If a cable is properly terminated and you don't have common-mode problems, most of its radiated emissions will be from holes in the shield. Thus optical coverage, the percentage of the shield's nominal area that is actually covered by wires/conductive foil, is a reasonable approximation to the shielding effectiveness. It is very difficult to braid wires in a way that achieves over 95% optical coverage. A foil shield, with the overlap folded over so the conductive surfaces touch, can easily achieve 100% optical coverage, but is fragile. If a foil-shielded cable vibrates, or is repeatedly bent, the foil will eventually tear. Even if end-to-end continuity is retained, this hole in the shield can cause a great increase in radiated emissions. By braiding wires over the foil, you start out with 100% optical coverage, and if/when the foil tears degrade in just that area to the 90-95% optical coverage of the braid. We used to use a type of parallel cable for Electromagnetic Compatibility (EMC) testing that had a foil shield. We would get about three weeks use out of these before they went bad and had to be thrown away because of excessive radiated emissions. I helped develop and release an IEEE-1284 parallel cable in 1994 (Lexmark partnumber 1329605) that used a foil braid shield, and we put these in our EMC lab. It took nine months of heavy use before the first of these cables exhibited a noticeable increase in emissions over brand-new cables. John Barnes Advisory Engineer Lexmark International --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. 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: Jim Bacher: jim_bac...@mail.monarch.com Michael Garretson:pstc_ad...@garretson.org For policy questions, send mail to: Richard Nute: ri...@ieee.org --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. 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: Jim Bacher: jim_bac...@mail.monarch.com Michael Garretson:pstc_ad...@garretson.org For policy questions, send mail to: Richard Nute: ri...@ieee.org = Best Regards Hans Mellberg __ Do You Yahoo!? Thousands of Stores. Millions of Products. All in one Place. http://shopping.yahoo.com/ --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. 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: Jim Bacher: jim_bac...@mail.monarch.com Michael Garretson:pstc_ad...@garretson.org For policy questions, send mail to: Richard Nute: ri...@ieee.org
Re: Optical Isolators
There are manufacturers that make optocouplers with VDE approval. Infineon (formerly the Siemens' semiconductor division) has a number of optocouplers that can be ordered with VDE approval as an option. At one time, Siemens even had some optocouplers with the leads bent to a 0.4 inch (10 mm) spacing for larger creepage and clearance distances. I have not seen these for a while, but they may still exist. Ted Eckert Regulatory Compliance Engineer American Power Conversion Corporation ted.eck...@apcc.com The items contained in this e-mail reflect the personal opinions of the writer and are only provided for the assistance of the reader. The writer is not speaking in an official capacity for APC nor representing APC's official position on any matter. MartinJP@appliedbios ystems.com To: emc-p...@majordomo.ieee.org Sent by:cc: owner-emc-pstc@ieee.Subject: Optical Isolators org 11/07/00 07:18 PM Please respond to MartinJP We are a manufacturer of Laboratory Equipment. We evaluate our products to UL 3101, CSA 1010.1 and EN 61010-1. We purchase a primary component that relies on optical isolators to separate primary from secondary. It seems that these optical isolators only have UL approvals. Are there any additional requirements for European approval?If so, what are they? Are there optical isolators that have both UL and European agency approvals? All responses are appreciated. Regards Joe Martin EMC/Product Safety Engineer marti...@appliedbiosystems.com --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. 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: Jim Bacher: jim_bac...@mail.monarch.com Michael Garretson:pstc_ad...@garretson.org For policy questions, send mail to: Richard Nute: ri...@ieee.org --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. 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: Jim Bacher: jim_bac...@mail.monarch.com Michael Garretson:pstc_ad...@garretson.org For policy questions, send mail to: Richard Nute: ri...@ieee.org
