Post by thread:[EE] PC motherboard to COM cable specification

There are two standards of wiring the 2x5 pin motherboard RS232 connector to the DB9 connector mounted on the PC rear pannel. I want to use such cable connection for a product requiring a debbuging over the RS232. Any link to the specification of those cables ? Right now I have no one around to measure it and get the schematic. thx, Vasile

http://www.geocities.com/vbmcomputers/pinout/#10 The pinout shown in chart #15 is by far the most common. It is what you get when a 10 pin IDC header and DE9 IDC connector are used. At 11:15 AM 8/18/2007, you wrote: >There are two standards of wiring the 2x5 pin motherboard RS232 > connector to the DB9 connector mounted on the PC rear pannel. > I want to use such cable connection for a product requiring a > debbuging over the RS232. Any link to the specification of those > cables ? Right now I have no one around to measure it and get the > schematic. > thx, > Vasile >

Here's the one for my Intel D845WN motherboard: 2X5 pin Signal Name DB9 pin 1 DCD 1 2 RxD# 2 3 TxD# 3 4 DTR 4 5 Ground 5 6 DSR 6 7 RTS 7 8 CTS 8 9 RI 9 10 --- Vasile Surducan wrote: > There are two standards of wiring the 2x5 pin motherboard RS232 > connector to the DB9 connector mounted on the PC rear pannel. > I want to use such cable connection for a product requiring a > debbuging over the RS232. Any link to the specification of those > cables ? Right now I have no one around to measure it and get the > schematic. > thx, > Vasile >

On Sat, 18 Aug 2007 08:15:24 -0700, you wrote: >There are two standards of wiring the 2x5 pin motherboard RS232 > connector to the DB9 connector mounted on the PC rear pannel. > I want to use such cable connection for a product requiring a > debbuging over the RS232. Any link to the specification of those > cables ? Right now I have no one around to measure it and get the > schematic. > thx, > Vasile Look at motherboard manuals on the makers' websites - these will have the pinout info in.

Thank you Kevin, Carl and Mike. On 8/18/07, Kevin Timmerman <spam_OUTlistsTakeThisOuTpcmx.net> wrote: > > http://www.geocities.com/vbmcomputers/pinout/#10 > > The pinout shown in chart #15 is by far the most common. It is what > you get when a 10 pin IDC header and DE9 IDC connector are used. > > > > At 11:15 AM 8/18/2007, you wrote: > >There are two standards of wiring the 2x5 pin motherboard RS232 > > connector to the DB9 connector mounted on the PC rear pannel. > > I want to use such cable connection for a product requiring a > > debbuging over the RS232. Any link to the specification of those > > cables ? Right now I have no one around to measure it and get the > > schematic. > > thx, > > Vasile > >--

On Sat, 2007-08-18 at 08:15 -0700, Vasile Surducan wrote: > There are two standards of wiring the 2x5 pin motherboard RS232 > connector to the DB9 connector mounted on the PC rear pannel. > I want to use such cable connection for a product requiring a > debbuging over the RS232. Any link to the specification of those > cables ? Right now I have no one around to measure it and get the > schematic. > thx, > Vasile AFAIK, of the ones I've seen, the mapping is the same, i.e. pin 1 on the 2x5 connector corresponds to pin 1 on the DB9. pin 10 on the 2x5 is usually a key (a missing pin). TTYL