A good economical solution for field wiring is to use CAT5 or CAT6 twisted pair cable. Connect each twisted pair to the same set of signal pins – TX+/TX- would be one pair of conductors, RX+/RX- another pair of conductors, and GND a third pair of conductors.9 dic 2009
Can Ethernet cable be used for RS-485?
cat5e can be used up to 100m ethernet link. it has 4 twisted pairs so technically you should be able to use it for RS485 or RS422. if using 485, you need two twisted pairs so remaining 4 wires can be used for power. 485 cable should be shielded but twisted pairs of cat5e may work for some environments and baud rates.29 sept 2013
Does RS-485 need twisted pair?
RS-485 is designed to be a balanced system. Simply put, this means there are two wires, other than ground, that are used to transmit the signal. ... Although RS-485 can be successfully transmitted using multiple types of media, it should be used with wiring commonly called "twisted pair."