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[单选题]
多功能电能表RS£485接口规定的通信速率是()bit£¯s。
A.600
B.2400
C.1200
D.9600
查看答案
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A.600
B.2400
C.1200
D.9600
A.采用两线制时同一RS-485总线最多可挂载64个节点
B.RS485通信最大传输速度在1Mb/s左右
C.PIS系统与ATI的接口为RS-485串行接口
D.地铁用RS-485通信总线一般为全屏蔽双绞线
A.RS-252
B.RS-465
C.RS-432
D.RS-485