Searching \ for '[EE] A<--> Optoisolators (comm) <--> B' in subject line. ()
Make payments with PayPal - it's fast, free and secure! Help us get a faster server
FAQ page: www.piclist.com/techref/index.htm?key=optoisolators+comm
Search entire site for: 'A<--> Optoisolators (comm) <--> B'.

Exact match. Not showing close matches.
PICList Thread
'[EE] A<--> Optoisolators (comm) <--> B'
2006\06\21@132726 by Joe Mailer

picon face
Hello,

I have two systems A and B. I'd like to have a robust optically isolated communication line (going real time). I have choose RS-232/422/485 as possible communication protocols.

I have been searching the net for optoisolators, there are a huge amount of those, but thinking that communication is bidirectional and it could be fast, what are more suitable optoisolators for doing such a thing ? I have been looking to (new) analog iCouplers[1], those look good, but i need good MTBF and good support in the future.

Any other good idea ?

Thanks !

[1] http://www.analog.com/UploadedFiles/Product_Highlights/619913805627963397963229iCoupler_Brochure.pdf

               
---------------------------------

LLama Gratis a cualquier PC del Mundo.
Llamadas a fijos y móviles desde 1 céntimo por minuto.
http://es.voice.yahoo.com

2006\06\21@165840 by Martin K

flavicon
face
Perhaps check out the 6N137 / HCPL2601 / etc. from Fairchild.
The datasheet claims 10Mbit/s.
--
Martin K

Joe Mailer wrote:

{Quote hidden}

2006\06\21@165952 by Bob Axtell

face picon face
Joe Mailer wrote:
> Hello,
>
> I have two systems A and B. I'd like to have a robust optically isolated communication line (going real time). I have choose RS-232/422/485 as possible communication protocols.
>
> I have been searching the net for optoisolators, there are a huge amount of those, but thinking that communication is bidirectional and it could be fast, what are more suitable optoisolators for doing such a thing ? I have been looking to (new) analog iCouplers[1], those look good, but i need good MTBF and good support in the future.
>
> Any other good idea ?
>
> Thanks !
>
> [1] http://www.analog.com/UploadedFiles/Product_Highlights/619913805627963397963229iCoupler_Brochure.pdf
>
>                  
> ---------------------------------
>
> LLama Gratis a cualquier PC del Mundo.
> Llamadas a fijos y móviles desde 1 céntimo por minuto.
> http://es.voice.yahoo.com
>  
You have to be a little bit careful with opto-isolators. They degrade
with time, degrade even faster if
the IR led is driven hard, so the performance you see initially won't
hold up later.

--Bob

2006\06\21@180330 by Steve Smith

flavicon
face
A transformer is naturally bidirectional you need two optos
Just a thought !
Steve

-----Original Message-----
From: spam_OUTpiclist-bouncesTakeThisOuTspammit.edu [.....piclist-bouncesKILLspamspam@spam@mit.edu] On Behalf Of
Joe Mailer
Sent: 21 June 2006 18:27
To: Microcontroller discussion list - Public.
Subject: [EE] A<--> Optoisolators (comm) <--> B

Hello,

I have two systems A and B. I'd like to have a robust optically isolated
communication line (going real time). I have choose RS-232/422/485 as
possible communication protocols.

I have been searching the net for optoisolators, there are a huge amount of
those, but thinking that communication is bidirectional and it could be
fast, what are more suitable optoisolators for doing such a thing ? I have
been looking to (new) analog iCouplers[1], those look good, but i need good
MTBF and good support in the future.

Any other good idea ?

Thanks !

[1]
www.analog.com/UploadedFiles/Product_Highlights/619913805627963397963
229iCoupler_Brochure.pdf

               
---------------------------------

LLama Gratis a cualquier PC del Mundo.
Llamadas a fijos y móviles desde 1 céntimo por minuto.
http://es.voice.yahoo.com

2006\06\22@011020 by Vasile Surducan
face picon face
I have used with success up to 115200bps a few optocouplers:
H11L1, MOC5007 or PC900V.
If my memory has no faulty memory locations, all above have an inside
trigger schmidth and works with IR currents below 5mA. (H11L1 even
with 1mA).

success,
VAsile

On 6/21/06, Joe Mailer <maildmxspamKILLspamyahoo.es> wrote:
{Quote hidden}

>

2006\06\22@032759 by Luis.Moreira

picon face
Hi Joe,
I am not sure what distance you are looking for, but we use fibre-optics.
The HFBRXXXX from Agilent(now called AVAGO TECHNOLOGIES) are very easy to use and you can get any size patch cord so no need to do fibre terminations. I use HFBR1414 as TX and HFBR2414 as RX, they are available at farnell and RS.
Hope it helps
Best regards
                       Luis





{Original Message removed}

2006\06\22@103710 by Joe Mailer

picon face
iCouplers from analog claim to be bidirectional.

Steve Smith <.....xygaxKILLspamspam.....blueyonder.co.uk> escribió: A transformer is naturally bidirectional you need two optos
Just a thought !
Steve

{Original Message removed}

2006\06\22@104042 by Joe Mailer

picon face
Interesting matter, do you know any paper that tells about this issue ? I'm not quote sure about iCouplers degrade.

Bob Axtell <EraseMEengineerspam_OUTspamTakeThisOuTcotse.net> escribió: Joe Mailer wrote:
> Hello,
>
> I have two systems A and B. I'd like to have a robust optically isolated communication line (going real time). I have choose RS-232/422/485 as possible communication protocols.
>
> I have been searching the net for optoisolators, there are a huge amount of those, but thinking that communication is bidirectional and it could be fast, what are more suitable optoisolators for doing such a thing ? I have been looking to (new) analog iCouplers[1], those look good, but i need good MTBF and good support in the future.
>
> Any other good idea ?
>
> Thanks !
>
> [1] http://www.analog.com/UploadedFiles/Product_Highlights/619913805627963397963229iCoupler_Brochure.pdf
>
>    
> ---------------------------------
>
> LLama Gratis a cualquier PC del Mundo.
> Llamadas a fijos y móviles desde 1 céntimo por minuto.
> http://es.voice.yahoo.com
>  
You have to be a little bit careful with opto-isolators. They degrade
with time, degrade even faster if
the IR led is driven hard, so the performance you see initially won't
hold up later.

--Bob

2006\06\22@120338 by Bob Axtell

face picon face
Joe Mailer wrote:
> Interesting matter, do you know any paper that tells about this issue ? I'm not quote sure about iCouplers degrade.
>  
I haven't done much on optos in several years. But there were several
papers showing degradation with time and current. I don't have anything
on it in front of me.
I suggest that you contact Panasonic and ask them about degradation of
their PS2501 series, I think that's the last info I saw on it.The
problem is in the emitter, not
the receiver.

--Bob

{Quote hidden}

2006\06\22@124545 by William Bross

picon face
So does the si844x series couplers from http://www.silabs.com

Bill

Joe Mailer wrote:

>iCouplers from analog claim to be bidirectional.
>
>Steve Smith <@spam@xygaxKILLspamspamblueyonder.co.uk> escribió: A transformer is naturally bidirectional you need two optos
>Just a thought !
>Steve
>
>{Original Message removed}

2006\06\22@174520 by Bob Axtell

face picon face
If you Google "Led Degredation", you'll get about 10,000 hits.
But the PDF below pretty well nails it in general terms:

http://www.litebeams.com/pdf/caltrans.pdf .

--Bob

Joe Mailer wrote:
{Quote hidden}

More... (looser matching)
- Last day of these posts
- In 2006 , 2007 only
- Today
- New search...