Brian, Yes the U measurements are used in the United States. As you have found out that does not mean that all units have a height that are in whole number multiples of the U measurement. I don't believe that there is any requirement that they be a whole number multiple of 1U, at least here in the U.S. Is there such a requirement in the UK? In most cases that I have seen front panels are a whole number multiple of 1U, but not always. We have designed units that are whole number multiples of 1U, such as 1U, 3U, 4U, etc. We have also designed equipment that is an odd size, such as 3.75" or 2.14U. Hope this helps to clear up the confusion ( in reality it will probably add more).
Best regards, Kurt Andrews Compliance Engineer Tracewell Systems, Inc. 567 Enterprise Dr. Westerville, OH 43081 Ph. 614-846-6175 Fax 614-846-7791 Email: [email protected] -----Original Message----- From: Brian Harlowe [SMTP:[email protected]] Sent: Wednesday, October 27, 1999 12:30 PM To: [email protected] Subject: Electronic unit panel sizes Excuse me from drifting away from the main topics of this forum. But can one of you whizzy american engineers help a poor englishman out. In the UK ( and Europe) front panels are measured in Us where 1U equals 1.75 ins or 44.45 millimetres. Does this system operate in the states? The reason I ask is we have an American unit to accomodate that 11 inches high which works out at 6.29U!!! Help Brian Harlowe * opinions expressed here are personal and in no way reflect the position of VG Scientific --------- This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to [email protected] with the single line: "unsubscribe emc-pstc" (without the quotes). For help, send mail to [email protected], [email protected], [email protected], or [email protected] (the list administrators). --------- This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to [email protected] with the single line: "unsubscribe emc-pstc" (without the quotes). For help, send mail to [email protected], [email protected], [email protected], or [email protected] (the list administrators).
