RS-485

from The Free On-line Dictionary of Computing (8 July 2008)

EIA-485
RS-485

   <communications, standard> (Formerly "RS-485") An {EIA}
   {serial line} {standard} which specifies 2-wire,
   {half-duplex}, {differential line}, {multi-point}
   communications.  Maximum cable length is 1200m.  Maximum data
   rates are 10Mbps at 1.2m or 100Kbps at 1200m.  EIA-485 can
   implement a truly multi-point communications network, and
   specifies up to 32 drivers and 32 receivers on a single
   (2-wire) bus.

   {Differential SCSI} uses EIA-485.

   Details on RS-232, 422, 423, and 485
   (http://rs485.com/rs485spec.html).

   (2003-04-18)