Hello Jim: I'm not sure yet, I am trying verify this...but be careful!! I believe that at this time Japan currently only accepts IEC 950 amendment 2. I do not think they are approving equipment to amendments 3 or 4 at this time.
I recently received a list of the Japanese deviations from CSA. Let me know if you need a copy. Mel Pedersen Midcom, Inc. Homologations Engineer Phone: (605) 882-8535 [email protected] Fax: (605) 886-6753 ---------- From: JIM WIESE[SMTP:[email protected]] Sent: Wednesday, March 12, 1997 6:00 PM To: treg-approval; TREG Subject: RE: ST interfaces and safety requirements for Japan Thanks Vic, It was a typo that caused me to put IEC 1950, I also should have mentioned I planned to use amendment 4. I guess what I was really asking was is a device that connects to an S/T interface point considered TNV-1 or TNV 3 by IEC 950 4th amendment in Japan. There also seems to be some confusion amongst test labs as to what "working voltage" to apply to the interface. Some say 240 VAC regardless of how it powered, eventhough Japan uses 100 VAC as I remember. Others say it is the output voltage of the transformer (assuming it meets the appropriate requirements to make the output SELV), and yet others have told me it is the maximum operating voltage on the telco interface. Any Thoughts? Thanks, Jim ---------- From: treg-approval To: TREG Subject: ST interfaces and safety requirements for Japan List-Post: [email protected] Date: Wednesday, March 12, 1997 3:45PM ---------- Forwarded Message ---------- From: JIM WIESE, INTERNET:[email protected] TO: emc-pstc, INTERNET:[email protected] treg, INTERNET:[email protected] Jim Wiese asked: We have an ISDN terminal adapter with an ST interface that we would like to market in Japan. Is IEC 1950 the applicable standard? Are there any country deviations that might apply to a ST interface device. What kind of creepage and clearance is required between telco and gnd, and telco and SELV. These units are powered by AC to DC wall packs and do not have internal AC supplies. (1) There is no IEC 1950, there is only a UL1950. There is an IEC950. (2) IEC950 wouldn't know an ST interface (actually, an interface at the ST reference point, there is no such thing as an ST interface) from a hole in the ground. (3) There is a document prepared by ETSI that gives the requirements at various interface points. Unfotunately, I don't have the reference number any longer, but Helmut Hintz of Alcatel and/or Robert Ferguson can help. (Helmut is the chair of IEC TC74 WG7, on Telecom requirements in IEC950; Robert is the eminence grise, responsible for maintaining sanity in IEC950). (4) You should evaluate this unit against IEC950, as you evaluate any other piece of ICT equipment. I would make sure that I had someone who knows Japanese tell me what is in the Japanese version of the document. My Japanese is worse than my Swedish. Ciao, Vic Boersma
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