George's comments were excellent, as usual, but I'd like to add my two cents for what it's worth.
Even if the product is as described in the second paragraph of George's message, it may be worth while having the product evaluated against the flammability criteria and mechanical strength, as well as fault conditions (to ensure that the product does not creep into the hazardous energy area due to a fault condition). The other consideration is 'specmanship' with your competitors. If your competitor spent the money to truthfully claim compliance, it places a burden on your sales folk to justify why your product does not have it. Some customers are not 'compliance savvy'. John Juhasz Fiber Options -----Original Message----- From: geor...@lexmark.com [mailto:geor...@lexmark.com] Sent: Thursday, January 13, 2000 10:33 AM To: emc-p...@majordomo.ieee.org Subject: LVD voltage range. John, I will assume from your comments that the device is SELV per the standards, i.e. non-hazardous voltages. This is a Class III unit. It does fall under the standard for one simple reason. The "scope" of the standard says for "mains or battery powered" devices. If you had no batteries, but operated only from an external AC/DC adapter (<60V or so), then you could get by with certification of the adapter, but not the powered device, as the device would fall outsdide the scope of IEC 60950 and equivalents. George Alspaugh Lexamrk International Inc. Hello all, Does a hand-held field device that operates mainly on 12Vdc from a group of batteries and alternatively uses an AC/DC adapter need to be assessed for safety according to the LVD? I read somewhere that for LVD the DC voltage should be between 75 and 1500V. Does this mean that such a device does not need to be evaluated for safety at all ? A client is awaiting a response from me in a couple of hours so I would appreciate any views on this matter. Thanks for your usual co-operation. John Whitfield Safety Engineer Rhein Tech Labs
