485 communication line, and cable and pipe laying it?
Frequency converters, power cables, transformers, high-power motors, etc. are often accompanied by low-frequency interference, and this interference is to use high conductivity materials shielding layer of cable can not be solved, including the original imported cables. Only with high permeability materials (such as steel wire, etc.) shielding layer can do effectively suppress low frequency interference.
On the other hand, if it is alternating current, it is absolutely impossible to go along with the RS485 signal line! Parallel installation shall be at least 30CM intervals. Otherwise, the RS485 signal line must be armoured type special cable.
If the power line is direct current, it can be paralleled with the same line of communication line. And we have this kind of special cable that can transmit signal line and transmit DC power supply.
