Jon - Would be grateful if you could send the single sheet to me at the fax number below:
+------------------------------------+ + Mark Briggs + + Elliott Labs, 684 W Maude Avenue + + Sunnyvale, CA 94086 + + + + Phone: +1 (408) 245 7800 x238 + + Fax: +1 (408) 245 3499 + + + + Email: [email protected] + + http://www.elliottlabs.com + +------------------------------------+ Mark >Application of ESD to connector pins has always been a point of >contention. I have usually exempted them from testing. My basis is >that the only authority I recall on the subject exempted connector pins. >The authority was the withdrawn CENELEC 101? series of immunity documents >which preceeded the current generic standards. > >Recently a new work item proposal 77B/189/NP Amendment to IEC 61000-4-2 - >"Definition of accessable parts under normal operating conditions" was >distributed for comment to the TC77B committee. As mentioned it's a NWIP >and has a long way to go to become a published ammendment. Nonetheless, >it appears to be a well constructed rationale for exempting many connector >pins from discharge. I have adopted this guidance at Curtis-Straus. > >Some examples of the text: > >... the following exclusions apply: >the points or surfaces of equipment which are no longer accessible after >installation > >the contacts of coaxial and multipin connectors which are provided with a >metallic shell. Note: contacts within a plastic shell shall be subject to >air discharge testing only. > >those contacts of connectors or other accessible parts which are ESD >sensitive because of functional reasons and are provided with an ESD >warning label... > >the points and surfaces which are only present under customer service >and are considered rarely accessed, eg changing batteries etc. > >Anyone who wants a copy of this one page document should send me their >name and fax number. > >Jon D. Curtis, PE > >Curtis-Straus LLC [email protected] >Laboratory for EMC, Safety, NEBS, SEMI-S2 and Telecom >527 Great Road voice (978) 486-8880 >Littleton, MA 01460 fax (978) 486-8828 >http://www.curtis-straus.com >On Wed, 22 Jul 1998 [email protected] wrote:
