Does the RS485 communication cable need grounding?
1. when the cable has only one layer shielding, one end of the shield is earthed with equal potential. 2. when the cable is double insulated and shielded, the outermost shield is grounded at both ends, and the inner layer is shielded at one end with equipotential grounding. 3. when the cable is used for frequent and serious interference, rodent lightning protection, explosion-proof requirements of the place, should adopt the armored shielded twisted pair cable
It depends on the wiring environment. When the electromagnetic induction, electrostatic induction and ground potential rise, the shielding layer of the cable must be grounded!
