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Re: Serial Port extensions and multipliers
Am 08.10.2010 14:16, schrieb Geoff Hargreaves:
> It is possible to transmit RS232 over long distances, but the longer
> the distance, the lower the baud rate needs to be in order to reliably
> transmit and receive the data. I know of an installation that
transmits
> RS232 down approx 100m of cable, but uses 300 baud, odd parity and 1
> stop bit.
>
> Most likely you will be needing to use higher baud rates, say 9600 or
> higher. 15m isn't too long, so you will probably be OK. For long runs
> (like the 100m I mentioned earlier) you would normally use balanced
> leads and protocols such as RS422 or RS485. You can get converter
boxes
> to go at both ends of the cable to change RS232 to RS422 or RS485 and
> back again.
As a point of btdt: While working in the US, we ran lots of VT-xx0
terminals. All those terminals were connected via RS-232. Those cables
easily reached 100m. No problems running 9600bps
--
Best regards
Peer Oliver Schmidt
PGP Key ID: 0x83E1C2EA
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