Thank you, I have to "translate" all the signals, and I ' ve only one rs232
port and an Abaco bus, that I don't know at all. Aniway I''ll try to use
simply a maxim232 to convert the signal. I thought that a circuit like this
was quite common.

Thanks again

Stefano Falconetti

----------
> From: Gerhard Fiedler <lists@HOME.COM>
> To: PICLIST@MITVMA.MIT.EDU
> Subject: Re: Rs422/485  to RS 232 interface
> Date: 09 March 1999 08:45
>
> At 08:25 03/09/99 +0100, Stefano Falconetti wrote:
> >Does anyone can suggest me where to find a simple scheme of an interface
> >from Rs422/485  to RS 232 ?
> >I know that a lot of them are on the web, but where exactly ?
>
> i'd probably chain a 422/485 driver and a 232 driver. (you can simplify
> both of them, but this then depends on the specifics of the app.) keep in
> mind that the 485 is usually a bidirectional (multidrop) link which means
> the tx driver needs a control signal whether to drive the line or not.
this
> is often done with one of the control lines of the 232.
>
> ge