Title :
RS485/422 Solution in Embedded Access Control System
Author :
Shi, Lei ; Guo, Baolong
Author_Institution :
ICIE Inst. Sch. of Electromech. Eng., Xi Dian Univ., Xi´´an, China
Abstract :
RS422/485 serial bus is widely used in embedded systems for the medium and long-distance data communication. In this paper, the main technologies of RS422/485 bus application in embedded system such as topology, cabling network matching, over-voltage transient protection, earth technology, failure protection and deadlock are elaborated in detail first, then a specific example of embedded access system using RS485/422 is introduced, designing a RS422 and RS485 switch usage hardware solution with only single-driver needed, and reliability of data communication is obtained as well as low software-cost effectively.
Keywords :
authorisation; data communication; embedded systems; peripheral interfaces; RS422 serial bus; RS485 serial bus; data communication reliability; embedded access control system; Access control; Communication cables; Communication switching; Data communication; Earth; Embedded system; Network topology; Protection; Switches; System recovery;
Conference_Titel :
Biomedical Engineering and Informatics, 2009. BMEI '09. 2nd International Conference on
Conference_Location :
Tianjin
Print_ISBN :
978-1-4244-4132-7
Electronic_ISBN :
978-1-4244-4134-1
DOI :
10.1109/BMEI.2009.5305573
