There are numerous RS-232 cards in both PCI and PCI-E varieties=20
available. Try
http://www.startech.com/Cards-Adapters/Serial-Cards-Adapters
The 8 port is kind of pricey, but several 2 or 4 port should do the job=20
also. I have a Microchip C2SBC-Q AT motherboard with 4 RS-232 ports (one=20
out the back, and 3 on board headers with a 2 port PCI card, both Linux=20
(Ubuntu), XP Pro SP3, and Windows 8 recognize all the ports.


On 11/29/2012 7:13 AM, Henrique Ribeiro de Oliveira wrote:
> Hello
>
> We have 6 CNC lathes here that use RS232 to download/upload programs into
> the server.
> I was planning on making a RS232 Switch Box and leave all the machines
> connected.
>
> Searching on the google I found a Analog Switch that can handle +-15V.
> (DG211)
>
> Datasheet  -  http://www.datasheetcatalog.org/datasheet/intersil/fn3118.p=
df
>
>
> The CNC RS232 is on a DB25 port that has 13 wires but it can be simplifie=
d
> to a DB9. I'm not sure how many I/Os I need, on the worst case is 8.
> So 2 x DG211 for each machine and maybe a microcontroler to control
> everything.
>
>
> Tryed to find a cheap version of it but all models that I found does not
> have enough ports.
>
> Anyone already did something like this before? Can be done like that?
>
>
> Thanks,
>
> Henrique

--=20
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