Chris, With regard to your questions on EN60601-1:
1. The equivalent UL standard is UL 2601-1, which contains about 40 pages of deviations and then the complete text of IEC 60601-1. 2. I know of no reason related to EN 60601-1 that would cause PS manufacturers to prefer DIN connectors. 3. Medical equipment may be earthed (Class 1) or double insulation (Class II). Another issue is the type of 'applied part' (the part in contact with the patient), which may be earthed or floating, depending on the type of medical device. 4. The secondaris of many medical grade power supplies are not designed to be in direct conductive connection with the patient. Additional insulation is usually required. 5. Red or yellow indicators must not be used for the ON/OFF switch. Green is usually used. Regards, Jon Griver http://www.601help.com The Medical Device Designer's Guide to IEC 60601-1 On 7 Apr 2003 at 15:29, Chris Chileshe wrote: > > Hello group, > > I am a novice to medical grade electrical equipment requirements > so it is quite likely my query is one that has received responses > on this forum time and time again. You will be pleased to note that > I received the 'relevant sections' of the standard EN 60601 this > morning, and the Forklift truck that dropped them off has left the > premises (so I jest, but they might as well have been delivered by > Forklift!.. I didn't realise the standard was that size! ). > > Query > -------- > Are there any UL standards I should be looking at in conjunction > with EN 60601? > > I have been looking at commercially available medical grade PSU's > and I find the 5-way DIN connector extensively used. Is this the > preferred connector? If so which standard should I be looking at to > design the mating part? If not, is there a section of the standard > which recommends connector types? > > The 5-way DIN connector from different manufacturers appears to have > the same pin assignments. Is the metallic ring around the pins assigned > a function such as Earth etc? No manufacturer I have looked at seems > to have this explained. > > If the ring around the 5-way DIN is not used for earthing (grounding) > is there a requirement for DC powered equipment to be earthed, and if > so, how is this achieved? > > I need to include an indicator (l.e.d.) for a 'power on' condition. Does > EN 60601-1, Clause 6.7 apply ( i.e. Red, Yellow, Green and other > for such a function )?. > > Your help is much appreciated, and thanx in advance. > > Best regards > > - Chris Chileshe > - Ultronics Ltd > > (Own views only etc etc) > > This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ 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: Ron Pickard: emc-p...@hypercom.com Dave Heald: davehe...@attbi.com For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org Archive is being moved, we will announce when it is back on-line. All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc
