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 (https://rs485.com/rs485spec.html).
(2003-04-18)