Bus cable for rs 485 application can bus black belden belden 9841 an industrial data cable for rs 485 applications such as hart can open or dmx 512 uniform impedance low capacity and a beldfoil aluminium polyester foil this cable is predestined for universal use in data transmission with beldfoil it has 100 shielding to protect against radiation and against irradiation of possible audio and radio frequencies belden 9841 data cable for rs 485