standard connector not found on digikey - from hospital electric bed - Page 1
Forum section: electronics / projects

author: ddavidebor
author_rank: Super Contributor
timestamp: October 25, 2013, 09:39:03 pm
content: hi guysin my school we're going to replicate some board for a local hospital, because they can't afford the time and the money the manufacturer request for change a stupid relay. (it's not a hospital, it's one of this place for old people, dunno the name in english)so, we're blocked here,we've this 2 connector. they're standard din connector, 2 pole and 7 pole.the foto under is from the original boardand those are the connector on local stores: (sorry for the italian pages)http://www.anteipaolucci.it/connettori-punto-linea/4837-presa-per-altoparlanti-2-poli.htmlhttp://www.anteipaolucci.it/prese-din/8971-presa-din-da-pannello-7-poli.htmlwe've been unsuccessfully searching them on digikey. tens of keywords, hundreds of item... nothing.probably simply we don't know how they're named.can someone of you help us? with some useful keyword or links. we've done the best we can, but... it's not enough.thanks a lot

author: c4757p
author_rank: Super Contributor
timestamp: October 25, 2013, 09:43:41 pm
content: They should be under "circular connectors". Here's theseven-pinconnector, though it's a PCB-mount and I don't know if the footprint matches.

author: orion242
author_rank: Unknown
timestamp: October 25, 2013, 09:48:07 pm
content: Google 7 pin DIN connector.

author: ddavidebor
author_rank: Super Contributor
timestamp: October 25, 2013, 09:52:44 pm
content: ok thanks a lot.that was the easy part, but the real problem is the 2 pin one.no one use it since the 80's...

author: ElectroIrradiator
author_rank: Frequent Contributor
timestamp: October 25, 2013, 10:05:56 pm
content: The 2 pin is the old DIN speaker connector, never heard it mentioned any other way. It is a really, really lousy connector, which is likely to give heaps of trouble for anything but very light duty. Would recommend trying to design around that one if you can, even if you can find a source for them. The round 7 pin 270 degree circular DIN connector is much better by comparison, which is saying a lot...No idea where you might find new ones.

author: ddavidebor
author_rank: Super Contributor
timestamp: October 26, 2013, 10:35:53 am
content: i know but we must use this shitty connector

author: G7PSK
author_rank: Super Contributor
timestamp: October 26, 2013, 12:35:29 pm
content: They have the plugs on Amazon.http://www.amazon.co.uk/Pin-Din-Line-Plug-Grey/dp/B000L1LBMYAnd the socket at Maplins.http://www.maplin.co.uk/2-pin-din-chassis-socket-950These people have some better ones with metal cases.http://www.dem-uk.com/deltron-components/products/din_connectors/din_speaker_plugs_and_sockets/Also here seems that you need to look for Deltron.http://www.audiospares.com/product.php?productid=1585

author: ciccio
author_rank: Frequent Contributor
timestamp: October 26, 2013, 03:24:31 pm
content: The 7 pin is present in Italian ADIMPEX catalog (www.adimpex.it). See attached PDF. Many distributors in Italy carry ADIMPEX products. Contact them for an address, or better have the teacher do this: maybe they will supply with some free samples.Also RS (www.rswww.it) stores them: search for article code 491-043.Could not find a pcb version of the 2 pin. It was in use many years ago, now it's an obsolete solution, but you can use a panel mounting type, two pieces of wire an maybe a sheet metal support If you are cloning the PCB, why don't modify it and use another connector, or the panel type directly soldered to the PCB (it is possible).Best regards

author: ddavidebor
author_rank: Super Contributor
timestamp: October 26, 2013, 05:27:19 pm
content: Thankyou, we're probably going to design a way to mount one of this cheap panel ones.Thankyou to everyone for the help.

author: fcb
author_rank: Super Contributor
timestamp: October 26, 2013, 05:45:21 pm
content: Both connectors are known as "DIN connectors". The 2 pin one used to be very common on old 'hi-fi' for the speakers (google DIN speaker connector).With the exception of the 2 pin speaker connector, DIN connectors are pretty good at doing what they do, NAIM Audio still use 5 pin DIN's for turntable connections. I still use them for MIDI.

author: ivan747
author_rank: Super Contributor
timestamp: October 26, 2013, 06:05:22 pm
content: Quote from: ddavidebor on October 26, 2013, 05:27:19 pmNo, don't buy the cheap onesThey will call you again in a month asking for them to be replaced again. Spend money on a good connector once and everyone will be happier.

author: G7PSK
author_rank: Super Contributor
timestamp: October 27, 2013, 09:56:37 am
content: Those Deltron ones look quite good and at £1-68 each I would not call them cheap.http://www.audiospares.com/product.php?productid=1585http://www.audiospares.com/image.php?id=2087&type=Dhttp://www.audiospares.com/image.php?type=P&id=1585

author: ddavidebor
author_rank: Super Contributor
timestamp: December 28, 2013, 07:54:22 pm
content: We've searched more and more and still we can't find a pcb mounted ones

author: babysitter
author_rank: Frequent Contributor
timestamp: December 29, 2013, 05:51:53 pm
content: ddavidebor and friends going to get into legal "black zone" in 3... 2... 1....If it is supposed to fulfill a function on a human treating, monitoring, or easing a problem, it is a medical device and needs to be compliant to directive 93/42 EWG when manufactured, traded or maintained.This is true not only for hospital tech but also home-use stuff (glucometers, blood pressure cuffs, beds for old and disabled people, even the contents of a simple first aid box) and also for use in the homes for the elders.I considerhttp://it.wikipedia.org/wiki/Direttiva_CEE_93/42_sui_dispositivi_medicito be a better read than the directive to summarize your problem. Your school is simply not able to bring out a medical device.Best regardsHendrik

author: ddavidebor
author_rank: Super Contributor
timestamp: December 30, 2013, 09:40:51 pm
content: i think we will justify ourself with the famous way of saying it... "it's not our problem".in fact until now nothing has been made... so...

author: chasxmd
author_rank: Contributor
timestamp: December 31, 2013, 01:52:50 am
content: Quote from: babysitter on December 29, 2013, 05:51:53 pmUsually I feel like comments like this aren't helpful for the poster but in this case I totally have to agree. It's not helping the school but in a sense it is. The school and poster should consider any legal issues with manipulating or interfacing with life-safety devices. The little I work with hospitals I know not to attempt any repair on devices because it puts you in a very nasty legal position if anything happens. Unless of course you're working on this in a less-fortunate country and you don't have the worries about nasty lawyers. Good luck!

author: babysitter
author_rank: Frequent Contributor
timestamp: December 31, 2013, 02:06:01 pm
content: Yeah, I can absorb and dissipate being the bad guy for one thread."It is not our problem" is a great thing to be taught in schools. Maybe they should develop ethics.Unfortunately, the guys who made this directive used quite a lawyer force to turn it into something that exactly makes it "your" problem if you decide to do such things.I will not piss on every LED-photodiode home pulseoximeter project in this forum or if you would say it is your own device you use only for yourself (not even family members), but here the administration of a organisationmaking moneyout of treating humans asked aschoolfor circumventing necessary spending where the school said yes (and maybe administration even asked for (less) money.)Even if you think that there cannot be real problems with hospital beds:The german authority (BfArM) listed 26 events with hospital beds between 2004 and 2007.16 with fatal consequences, dead people, you know. Your oldish-looking photo does suggest a old device, suspect to be even less safe than recent models. The minimum safety requirements got several overhauls in the last 20 years, iirc. Imagine a event with injuries, not even death - would you like to be even on the list of people who had been related to this bed and get under scrutiny, even if it might not be caused by your modification ?Best regardsHendrik (Full disclosure: Well paid for being on #1 in such lists for the medical devices I make and working hard in reducing the risks)Source:http://www.bfarm.de/DE/Medizinprodukte/risikoerfassung/wissauf/einklemmungen_Pflegebetten_2004-07.html

author: ConKbot
author_rank: Super Contributor
timestamp: December 31, 2013, 09:50:38 pm
content: And the 2-pin DIN connector on the device makes sense now! It was qualified with it way back when, and changing from the turd sandwich to something thats a better connector than the DIN 2-pin could ever wish to be would be a huge cost and have to re-qualify the whole bed system.

author: SArepairman
author_rank: Frequent Contributor
timestamp: January 01, 2014, 01:17:49 pm
content: just don't sign anything that shows proof that you made the changes. it will probably be fine, and they will likely need a signature to pin anything on you.an old engineer I knew told me that, something he worked on maimed someone (because of gross negligence, and they suspect the injured guy did it on purpose to try and get money from the company) but the engineer was fine because he refused to sign anything, essentially working off the books. if he did sign those design changes then they would have tried to gouge out his eyes and skull fuck him

author: ddavidebor
author_rank: Super Contributor
timestamp: January 02, 2014, 01:50:26 am
content: No one will ever sign anything fortunately.It's an off book work. Our school get some new gear and we send the gerber to some company for manufacturing. Noone touch money or has his name on something.That would work quite well. But students don't do anything if the teachers don't ask them, and they will not ask until all the pieces are provided.And that shitty '80s connector really piss me off! Grrrr