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气体检测仪远程通讯解决方案(七)

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如图所示,现场根据总线制(zhi)通(tong)讯方式进(jin)行组网,RS485信号传(chuan)输到(dao)光(guang)端(duan)机(ji)转(zhuan)为(wei)光(guang)信号,利用光(guang)纤进(jin)行传(chuan)输。在接收(shou)(shou)端(duan),光(guang)端(duan)机(ji)再把光(guang)信号转(zhuan)为(wei)RS485信号,给电脑、PLC等(deng)设备接收(shou)(shou)

这种通讯方式(shi),主要(yao)的优点(dian)是:

1、可以远(yuan)距离传输(shu),光纤(xian)能有(you)多(duo)(duo)长(zhang),信(xin)号就能传多(duo)(duo)远(yuan),无信(xin)号衰(shuai)减问题

2、信号传输(shu)速(su)(su)度(du)超快、稳(wen)定,只取决于设备的通讯速(su)(su)率

3、降低布线成本:光纤的成本比三芯(xin)电(dian)缆(lan)线、四(si)芯(xin)电(dian)缆(lan)线便宜很多

4、提高现(xian)场安装(zhuang)的效率,现(xian)在(zai)光纤网路(lu)在(zai)逐(zhu)步普及(ji),可以很方便的利用光纤进行局域网、外网组网传

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