29 Jun
2018
29 Jun
'18
10:17 a.m.
On 29/06/2018 14:31, Paul Koning via cctalk wrote:
Yes, and the specified distance limit for RS232 is
quite short, 50
feet or so.
People have used RS232 over longer distances, of course, and gotten
away with it.
The RS-232-C standard doesn't actually specify a maximum distance.
Section 3.1 *recommends* short cables up to 50 feet or 15 meters (with
speeds up to 20kbps) for RS-232 (and the later-dated Foreword suggests
RS-449 beyond that) but says that longer is fine so long as the load
capacitance excluding source and cable is less than 2500pF. In
practice, much depends on the baud rate and cable quality used.
--
Pete
Pete Turnbull