yes the "B" is technically (or should i say pedantically) wrong in all cases except the DB25 i used to know the correct ones but fortunately i have forgotten them i think 9 is DE9 15 is A as in DA15
now for the real quiz what is the true derivation of the term 'BNC' ? i have heard many differing and 'authoritative' answers Dennis Saputelli Bagotronix Tech Support wrote: > > Your peripheral is supposed to be a "DCE" (Data Communications Equipment), a > DB9F wired as: > > 1 DCD > 2 TX > 3 RX > 4 DSR > 5 GND > 6 DTR > 7 CTS > 8 RTS > 9 RI > > The above DCE mates with the PC connector, which is supposed to be a "DTE" > (Data Terminal Equipment), a DB9M wired as: > > 1 DCD > 2 RX > 3 TX > 4 DTR > 5 GND > 6 DSR > 7 RTS > 8 CTS > 9 RI > > It's not really a DB9 connector, it's proper name is something else (I can't > recall what). So what? So many people use the DB9 designation (I do) that > it's been redefined by popular usage. I say "DB9M" for a DB9 male, and > "DB9F" for a female connector. > > You see how the signals match up? Each side's RX goes to the other's TX, > each side's RTS goes to the other's CTS, each side's DTR goes to the other's > DSR. DCD and RI are "non-peer" signals, they are outputs on the DCE to the > inputs on the DTE. > > There is no standard for grounding of the connector shell. It's up to you > what you want to do with it. > > Best regards, > Ivan Baggett > Bagotronix Inc. > website: www.bagotronix.com > > ----- Original Message ----- > From: "Brian Guralnick" <[EMAIL PROTECTED]> > To: "Protel EDA Forum" <[EMAIL PROTECTED]> > Sent: Friday, July 11, 2003 2:48 PM > Subject: [PEDA] OT: DB9 RS-232 serial port on peripherals. > > > Hi, > > > > I was wondering what the pinouts of a peripheral's female RS-232 DB9 > connection. Basically, a device to be controlled by a > > standard PC. I'm having a bit of a conflict concerning the crossing of > the RX & TX lines. > > > > > > Thx. > > ____________ > > Brian Guralnick > > [EMAIL PROTECTED] > > ------------------------------------ > > Protel freebees:> http://pages.infinit.net/helloftp/protel.htm > > > > -- Dennis Saputelli ========= send only plain text please! - no HTML ========== _______________________________________________________________________ Integrated Controls, Inc. www.integratedcontrolsinc.com 2851 21st Street tel: 415-647-0480 San Francisco, CA 94110 fax: 415-647-3003 * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * To post a message: mailto:[EMAIL PROTECTED] * * To leave this list visit: * http://www.techservinc.com/protelusers/leave.html * * Contact the list manager: * mailto:[EMAIL PROTECTED] * * Forum Guidelines Rules: * http://www.techservinc.com/protelusers/forumrules.html * * Browse or Search previous postings: * http://www.mail-archive.com/[EMAIL PROTECTED] * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
