Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.
rs232 has some limitations: speed 15 m. extension cable, ... EIA produced RS449 to avoid this limitations. RS449 is composed of two stardards: rs423a for asimetric transmission or not balanced and RS422a which used in balanced transmission.
Some caracteristics of rs423:
- 60 metres maximun between two terminas.
- 2Mbps in rs422 or 40Kbps in rs432.
- 37 pins connector and 9 pins connector if a second channel is used