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RS485总线几个关键参数的理论研究

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Indexed by:期刊论文

Date of Publication:2014-06-01

Journal:单片机与嵌入式系统应用

Included Journals:ISTIC

Issue:6

Page Number:14-17

ISSN No.:1009-623X

Key Words:现场总线;RS485;偏置电阻;终端电阻

Abstract:最大负载、终端电阻、偏置电阻是感知层RS485总线的3个关键参数,本文通过建立RS485总线的等效电路模型,采用电流流向法对偏置电阻的理论值进行求解,进而分析了其对总线最大负载和终端电阻的影响,为 RS485总线的应用提供了理论基础,具有很高的实用价值。

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