Can I use a free NYM cable or control line for the dS 485 bus? digitalSTROM Support September 21, 2018 14:08 Updated Follow The dS485 bus requires two twisted wires for stable communication. A diameter of 0.6 - 0.8 mm is recommended. Related articles Which cable do you recommend according to VDE 0100-444 for the dS485 bus? Is it also possible to use 3-phase (400V) external conductors? Is the dS485 bus a SELV or PELV circuit? What does the cabling look like if I have several sub-distributions in a single-family house? What is the maximum cable length for a dS485 bus?