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跟OKI一起动手学(西门子S7-300/400系列)之S7-300硬件介绍

感谢继续关注OKI说工控,本篇主要将介绍下模块化小型PLC西门子S7-300系列的硬件部分知识。
S7系列PLC是在S5系列基础上研制出来的,现在SIMATIC S7系列包括:SIMATIC S7-200微型系列,SIMATIC S7-300模块化小型系列和中高档性能的SIMATIC S7-400系列,其中S7-400系列可以扩展到300多个模块。S7-300虽然是模块化的小型PLC系统,但是基本能够满足中等性能要求的应用。
S7-300采用模块式结构,由机架和模块组成。主要组成部分有:导轨(RACK)、电源模块(PS)、中央处理器(CPU)、信号模块(SM)、功能模块(FM)、接口模块(IM)和通讯模块(CP)。
PLC硬件组成方式

上图为300PLC模块式组成图,依次介绍个模块组成方式。

PLC模块安装

上图主要介绍模块与模块之间通过系统总线(模块自带)连接。该连接方式同三菱Q系列类似,不同的是总线与模块是配套的,而不在基板上。

下期预告(2019-12-12):连载2:跟OKI一起动手学(西门子S7-300/400系列)之S7-300组态介绍

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