I need EIA-RS232C standard

[[email protected]]

I need EIA-RS232C standard,anyone can send it to my email? thank you!
email:[email protected]

 

[Don Bowey]

I need EIA-RS232C standard,anyone can send it to my email? thank you!
email:[email protected]

I believe sales of EIA Standards is handled by:

Electronic Industries Association
Engineering Department
2001 Eye Street, N.W.
Washington D.C., 20006

You need to know that there are at least several revised versions of RS-232.
The first one is ANSI/EIA-232-D-1986. I imagine there may be at least three
or four later ones.

Don

 

[PeteS]

Two things.

1. It's easy to search for
http://www.google.com/search?hl=en&lr=&q=rs232&btnG=Search

2. The RS232 standard (in all it's variations) is a hardware and
signalling standard and does not specify any particular line protocol
(although it's usually used asynchronously).

Cheers

PeteS

 

[[email protected]]

sorry,from the google link I can not find orignal EIA-RS232C standard

 

[PeteS]

One wonders just which part of the spec you need.

There's really not that much to it.

Physical (connectors)
Definitions (DTE / DCE)
Signals, names, active levels, handshakes.
Electrical levels

I can't think of anything else

Cheers

PeteS

 

[PeteS]

You could try reading this:

http://www.camiresearch.com/Data_Com_Basics/RS232_standard.html

Cheers

PeteS

 

[Richard Henry]

You could try reading this:

http://www.camiresearch.com/Data_Com_Basics/RS232_standard.html

There is no such thing as a "DB9" connector. Maybe they meant "DE9".

The rest looks pretty good.

Remember the first rule of 232 troubleshooting: if it doesn't work. swap 2
and 3.

 

[PeteS]

I don't know why you would think there's no such thing as a DB9
connector.

I've used the term DB9 (and DB25 and DBx where x = # pins) for well
over 20 years, and so, apparently have others.

Go to Molex (www.molex.com) and put DB9 in the search box - it brings
up the venerable 9 pin D. I'll agree that nowadays it tends to be
called a D Subminiature (although it's not very miniature compared to
newer connectors).

Cheers

PeteS

 

[Roger Hamlett]

I don't know why you would think there's no such thing as a DB9
connector.

I've used the term DB9 (and DB25 and DBx where x = # pins) for well
over 20 years, and so, apparently have others.

Go to Molex (www.molex.com) and put DB9 in the search box - it brings
up the venerable 9 pin D. I'll agree that nowadays it tends to be
called a D Subminiature (although it's not very miniature compared to
newer connectors).

Cheers

PeteS

Yes.
In fact in an appendix to RS232D EIA (Jan 1987), there is table, listing
the CCITT V24, V28, and ISO IS2110 equivalents, which lists a 9 pin subset
of RS232D, and gives the pin numbers for a DB9...

Best Wishes

 

[[email protected]]

Go to Molex (www.molex.com) and put DB9 in the search box - it brings
up the venerable 9 pin D. I'll agree that nowadays it tends to be

Two wrongs don't make a right.

 

[Don Bowey]

Two wrongs don't make a right.

Which two wrongs would that be, troll?

 

[Kevin White]

Which two wrongs would that be, troll?

Strictly speaking the 'B' in DB9 should be the body size of the
connector (A - E) the small body used for a 'DB9' is an 'E' size. But
for some reason everybody has been using DB9 incorrectly for so long
that the 'DB9' term came to be commonly used term.

http://en.wikipedia.org/wiki/D-subminiature

kevin

 

[Peter Bennett]

I don't know why you would think there's no such thing as a DB9
connector.

I've used the term DB9 (and DB25 and DBx where x = # pins) for well
over 20 years, and so, apparently have others.

Go to Molex (www.molex.com) and put DB9 in the search box - it brings
up the venerable 9 pin D. I'll agree that nowadays it tends to be
called a D Subminiature (although it's not very miniature compared to
newer connectors).

But ITT Cannon, who I believe invented the D-subminature connector
family, says that the second letter indicates the shell size.

For standard-density connectors, an "A" shell holds 15 pins, "B" holds
25, "C" has 37, and "D" has 50. "E" (apparently an afterthought) has
9 pins.



--
Peter Bennett, VE7CEI
peterbb4 (at) interchange.ubc.ca
new newsgroup users info : http://vancouver-webpages.com/nnq
GPS and NMEA info: http://vancouver-webpages.com/peter
Vancouver Power Squadron: http://vancouver.powersquadron.ca

 

[Jamie]

There is no such thing as a "DB9" connector. Maybe they meant "DE9".

what ?
http://www.cablewholesale.com/catalog/db9serialcables.htm
please look there.
or have all of our manf sales ref gone wacky!

 

[Don Bowey]

Strictly speaking the 'B' in DB9 should be the body size of the
connector (A - E) the small body used for a 'DB9' is an 'E' size. But
for some reason everybody has been using DB9 incorrectly for so long
that the 'DB9' term came to be commonly used term.

http://en.wikipedia.org/wiki/D-subminiature

kevin

You are correct, but.......

When the Standards bodies, EIA in this case, don't step up to providing a
definition of the interfaces (DCE - DTE), then predominate terms will
prevail. Lacking a Standard, it is unlikely that all manufacturers will use
the same name for the same connector. Who "owns" the scheme discussed in
the link?

In ANSI/EIA-232-D-1986 the DCE -DTE connectors are called simply a 25-pin
connector and dimensions are provided. We all call it a DB25, but the
Standard doesn't.

Many connectors are "incorrectly" named, but who wants to fight it? The
Ethernet connector is called a RJ45, but those who know better know it
really should not be called that. EIA could have fixed the problem, but I
don't believe they have. So RJ45 works, it dominates, so it must be right.

FWIW my irritation with the troll was the lack of a quote directing
attention to the object of his post.

Don

Don

 

[Alan]

what ?
http://www.cablewholesale.com/catalog/db9serialcables.htm
please look there.
or have all of our manf sales ref gone wacky!

So what would you call a DE15? - that is the connector that is used
for computer video output. 15 pins in three rows in the same size
shell that a 9 pin standard D connector uses.

Perhaps we should call it a DB15 -- whoops we already have one of
them!

Alan


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P O Box 1108, Morley, Western Australia
Tel: +61 8 9370 5533 Fax +61 8 9467 6146
Web Site: http://www.jenal.com
Contact: http://www.jenal.com/?p=1
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[Roger Hamlett]

On 11/20/05 7:57 AM, in article
[email protected],
"[email protected]"


Which two wrongs would that be, troll?

It is a bit like 'Hoover', for 'vacuum cleaner'. From the original sizing
standards, 'DB9', would actually imply a plug the size/shape of the DB25,
with only 9 of the pin places populated. However the designation has
become so widely used now, that in a sense events have formed a 'new'
standard....

Best Wishes