In a message dated 7/11/2003 2:55:58 PM Eastern Daylight Time, 
[EMAIL PROTECTED] writes:


>     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.
> 
> 

You can find the full spec many places on the net, but here's what I always 
use on a peripheral:

Pins 2, 3, and 5 only - If I wanted all those handshake lines, I might as 
well use a parallel interface.

The peripheral needs a female DB-9, so you can just use a common straight 
through serial cable.

Pin 5 is ground on both ends.
The peripheral transmits on pin 2, the PC receives on pin 2.
The PC transmits on pin 3, the peripheral receives on pin 3.

Simple enough?

Steve Hendrix


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