How to make an abbplc communication cable

A bus cable will suffice; the following is generally recommended: standard shielded twisted-pair cable STP-120Ω (for RS485 & CAN), one pair with 20 AWG wire, an outer diameter of around 7.7 mm, and a blue jacket. Suitable for indoor use, pipelines, and general industrial environments. When in use, one end of the shielding layer must be grounded! Standard twisted-shielded cable STP-120Ω (for RS485 & CAN), one pair, 18 AWG; outer diameter of the cable is about 8.2 mm, with a gray jacket. Suitable for indoor use, pipelines, and general industrial environments. When in use, one end of the shielding layer must be grounded! Armored twisted pair shielded cable ASTP-120Ω (for RS485 & CAN), one pair, 18 AWG; outer diameter of the cable is about 12.3 mm, with a black jacket. It can be used in areas with severe interference, frequent rodent problems, as well as those with requirements for lightning protection and explosion prevention. When in use, it is recommended to ground both ends of the armored layer, and ground one end of the innermost shielding layer!