How to screen the communication cables of PLC to enhance its anti-interference ability? How to make the shielded wires of communication cables?
1. Communication cables use shielded cables and shield ground2, plus 120 ohm terminal resistor3, plus repeaters, in the PLC communication port directly add communication repeater, is the last resort.
In addition, if PLC communications take the form of Ethernet, the cable network needs to buy over six of the line, and then select the industrial class switches. Recommend better Chang switch, I now do the project on this, because the amount of large, I get the price is not bad.
First of all, communication cables need to buy shielded cables. Generally shielded cables have a shield inside the rubber sheath. Connect the shield to the ground of the control cabinet. In addition, if the communication line goes through the ditch, if there is a large current line in the trench, the galvanized pipe can be considered, and the interference can also be effectively shielded.
