RS-423

RS423
StandardEIA RS-423
Protocol information
Physical mediaGroup of copper cables
Network topologyPoint-to-point, Multi-dropped
Maximum devices10 (1 driver & 10 receivers)
Maximum distance1200 meters (4000 feet)
Mode of operationSingle-ended (unbalanced)
Maximum baud rateUp to 100kbit/s
Voltage-6V to +6V (maximum)
Mark(1)-4V to -6V
Space(0)+4V to +6V
Available signalsTx, Rx, GND
Connector typesNot specified

RS-423, also known as TIA/EIA-423, is a technical standard originated by the Electronic Industries Alliance that specifies electrical characteristics of a digital signaling circuit. Although it was originally intended as a successor to RS-232C offering greater cable lengths, it is not widely used.

RS-423 systems can transmit data on cables as long as 1,200 meters (3,900 ft).[dubiousdiscuss] It is closely related to RS-422, which used the same signaling systems but on a different wiring arrangement: RS-423 differed primarily in that it had a single return pin instead of one for each data pin.[1]

RS-423 specifies an unbalanced (single-ended) interface, similar to RS-232, with a single, unidirectional sending driver, and allowing for up to 10 receivers.[2] It is normally implemented in integrated circuit technology and can also be employed for the interchange of serial binary signals between DTE & DCE.

  1. ^ "EIA-423". foldoc.org. Retrieved 2021-07-08.
  2. ^ Buchanan W.J. (2004) RS-422, RS-423 and RS-485. In: The Handbook of Data Communications and Networks. Springer, Boston, MA.ISBN 978-1-4757-1067-0 page 627