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:濱州2098-DSD-HV030 AB伺服驅(qū)動(dòng)器 羅克韋爾怎么樣
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:濱州2098-DSD-HV030 AB伺服驅(qū)動(dòng)器 羅克韋爾怎么樣RS-485為半雙工，只有一對(duì)平衡差分信號(hào)線，不能同時(shí)發(fā)送和接收。使用RS-485通信接口和雙絞線可組成串行通信網(wǎng)絡(luò)(見(jiàn))，構(gòu)成分布式系統(tǒng)，系統(tǒng)中多可有32個(gè)站，新的接口件已允許連接128個(gè)站。RS-485接口多用雙絞線實(shí)現(xiàn)連接。個(gè)人計(jì)算機(jī)一般不配RS-485接口，但工業(yè)計(jì)算機(jī)配備RS-485接口較多。plc的不少通信模塊也配用RS-485接口。如西門(mén)子公司的S7系列CPU均配置了RS-485接口。
