FWIW, I regularly use RS-232 <-> RS485 converters.  Yes, it's an extra
piece of hardware but it does the job I need it to do, like remote
PTZ camera control.

diana

On Wed, 12 Dec 2007, Ingbert Meyer wrote:

>
> Hello Berndt Josef Wulf,
>
> there are lots of converters between RS232 or USB to RS485
>
> regards
>
> I. Meyer
>
>
> Berndt Josef Wulf wrote:
>> G'day,
>> 
>> what are people using to connect and control equipment with RS485 
>> interfaces. I've a number of receivers that I would like to control through 
>> a GUI that have RS485 remote control capability.