Is it possible to use 485 communication cables over 1000 meters in length?
By using impedance matching and low attenuation special communication cable, it is more advantageous to ensure communication! The utility model is suitable for multipoint communication within 1200 meters or point-to-point communication under 1800 meters, and is relieved of the trouble of relay power supply.4, reduce the signal baud rate.
Terminal resistance. The passive impedance matching method is the disadvantage of increasing the idle power consumption. If the battery powered system, it will reduce battery life.
Add repeaters (due to delay, the number is not greater than 8). Feasible, but the repeater shall be supplied separately, and a composite cable with signal and power lines may also be used.
