PROFIBUS现场总线网络层采用屏蔽双绞线连接。
The shield twisted-pair was used to link with PROFIBUS field bus network layer.
不选用双绞线，是极端过错的。485总线一定要是手牵手式的总线结构，坚决根绝星型连接和分叉连接。
Do not use twisted pair, is extremely wrong. 485 bus must be hand in hand type bus structure, resolutely eradicate star connection and branch connection.
大家知道普通的双绞线是由四组相互缠绕的网线连接在一起的。
We all know that an ordinary twisted-pair is from four groups of mutual entanglement of the cable connected.
应用推荐