More successful is the node bus arrangement of the system.The connection of the coaxial cable is not in front of the communication module,but at the back of the module,so that when the communication module fails during system operation,it can avoid accidentally touching the coaxial cable and causing the network cable to be disconnected.At the same time,the coaxial cable will not be touched at any time except for special inspection,which can prevent the coaxial cable from being loosened due to repeated plugging and unplugging,which increases the possibility of its failure.In addition,a management system for inspection and replacement of coaxial cables should be formulated,and replacement or treatment should be carried out before the contact resistance increases to affect communication.
比较成功的是系统的节点总线布置方式。其同轴电缆的连接不是在通信模件的前面,而是在模件的后面,这样当系统运行中处理通信模件故障时,可避免误碰同轴电缆,造成网线断路。同时,其同轴电缆除专门进行检查,任何时候都不会去触动,可防止因多次插拔同轴电缆的插头造成松动,增加其故障的可能。另外,应制定同轴电缆检查与更换管理制度,在其接触电阻增大至影响通信之前,进行更换或处理
Westinghouse 0T2S1 Selector Switch, 2 POS, CAM 1R
Mean Well S-60-5 AC/DC Single Output Switching Power Su
Siemens 6ES7 392-1AJ00-0AA0 Simatic Connector (lot of 2
LUBRIQUIP 521-001-050 WITH HONEYWELL MICRO SWITCH NE
TORK 2104 PHOTOELECTRIC SWITCH , GOOD WORKING CONDITION
Cutler Hammer C32OTD OFF Time Delay Interlock
ALLEN BRADLEY 700-CF220 SER A CONTROL RELAY ~
Phoenix Contact DIKD 1,5 Multilevel Terminal Block (LOT