Re: linux and rs-485
From: Grant Edwards (grante_at_visi.com)
Date: 08/07/03
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Date: 07 Aug 2003 15:18:40 GMT
In article <3F31CF74.CC170879@motorola.com>, Andrew Kelly wrote:
> RS-485 allows multiple transmitters and receivers on the line at
> the same time (up to a limit - 10 I think from memory?) ...
>
> If you are happy for your PC to use two tranceivers, get a converter
> that has an "always Tx'ing" converter hooked to your rs-232 Tx line,
> and an "always Rx'ing" converter hooked to your rs-232 Rx line ...
>
> Sorry - I don't have any names/models for you (too long since I
> did this stuff last!)
Opto-22 used to have a good line of converters and repeaters
that worked quite well. Some of them had to be configured to
match the baud rate and serial settings so that they knew when
to turn off the drivers.
The repeaters were particularly handy, since they could be used
to convert from a 4-wire interface to a 2-wire interface.
--
Grant Edwards grante Yow! Yow!! That's a GOOD
at IDEA!! Eating a whole FIELD
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