World Library  
Flag as Inappropriate
Email this Article


Article Id: WHEBN0012277352
Reproduction Date:

Title: Eia-423  
Author: World Heritage Encyclopedia
Language: English
Subject: EIA-530
Publisher: World Heritage Encyclopedia


Standard EIA RS-423
Physical Media Group of copper cables
Network Topology Point-to-point, Multi-dropped
Maximum Devices 10 (1 driver & 10 receivers)
Maximum Distance 1200 metres (4000 feet)
Mode of Operation Single-ended (unbalanced)
Maximum Baud Rate Up to 100kbit/s
Voltage Levels -6V to +6V (maximum)
Mark(1) -4V to -6V
Space(0) +4V to +6V
Available Signals Tx, Rx, GND

RS/EIA/TIA-423 is a standard for serial communications. It defines an unbalanced (single-ended) interface (similar to RS-232), with a single, unidirectional sending driver, and allows for up to 10 receivers (similar to RS-422). It is normally implemented in integrated circuit technology and can also be employed for the interchange of serial binary signals between DTE & DCE. There is no common pinout for RS-423. The BBC Micro computer used a 5-pin DIN connector. DEC used it extensively with a Modified Modular Jack connector. This was sometimes called "DEC-423".

Use of a common ground is one weakness of RS-423 (and RS-232): if devices are far enough apart or on separate power systems, the ground will degrade between them and communications will fail, resulting in a condition that is difficult to trace. In this respect the balanced serial connections USB, RS-422 and RS-485 are better,[1] and Ethernet over twisted pair connections are better yet, because of the galvanic isolation provided by the signal transformers.

See also


External links

  • RS-423 specification
  • Diagram of pin connections for BBC micro

cs:RS-422 de:EIA-422 es:RS-422 ko:RS-422 hr:RS-422 it:EIA RS-422 nl:RS-422 ja:EIA-422 pl:RS-422 pt:EIA-422 ru:EIA-422 zh:EIA-422

This article was sourced from Creative Commons Attribution-ShareAlike License; additional terms may apply. World Heritage Encyclopedia content is assembled from numerous content providers, Open Access Publishing, and in compliance with The Fair Access to Science and Technology Research Act (FASTR), Wikimedia Foundation, Inc., Public Library of Science, The Encyclopedia of Life, Open Book Publishers (OBP), PubMed, U.S. National Library of Medicine, National Center for Biotechnology Information, U.S. National Library of Medicine, National Institutes of Health (NIH), U.S. Department of Health & Human Services, and, which sources content from all federal, state, local, tribal, and territorial government publication portals (.gov, .mil, .edu). Funding for and content contributors is made possible from the U.S. Congress, E-Government Act of 2002.
Crowd sourced content that is contributed to World Heritage Encyclopedia is peer reviewed and edited by our editorial staff to ensure quality scholarly research articles.
By using this site, you agree to the Terms of Use and Privacy Policy. World Heritage Encyclopedia™ is a registered trademark of the World Public Library Association, a non-profit organization.

Copyright © World Library Foundation. All rights reserved. eBooks from Project Gutenberg are sponsored by the World Library Foundation,
a 501c(4) Member's Support Non-Profit Organization, and is NOT affiliated with any governmental agency or department.