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:滨州2098-DSD-HV030 AB伺服驱动器 罗克韦尔怎么样
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ALLEN BRADLEY 伺服驱动器 2098-DSD-HV150-SE
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:滨州2098-DSD-HV030 AB伺服驱动器 罗克韦尔怎么样RS-485为半双工，只有一对平衡差分信号线，不能同时发送和接收。使用RS-485通信接口和双绞线可组成串行通信网络(见)，构成分布式系统，系统中多可有32个站，新的接口件已允许连接128个站。RS-485接口多用双绞线实现连接。个人计算机一般不配RS-485接口，但工业计算机配备RS-485接口较多。plc的不少通信模块也配用RS-485接口。如西门子公司的S7系列CPU均配置了RS-485接口。