RS-422 和 RS485 标准概述与系统配置_英文

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Application Report SLLA070DJune 2002Revised May 2010 RS422 and RS485 Standards Overview and System Configurations Manny Soltero Jing Zhang and Chris Cockril HPA Industrial Interface Updated by Kevin Zhang Clark Kinnaird and Thomas Kugelstadt ABSTRACT ANSI TIAEIA422 and TIAEIA485 standards commonly known as RS422 and RS485 respectively specify balanced datatransmission schemes for long distances in noisy environments These standards are compared and their basic differences and similarities are......