you can absolutely use one of the pairs in an Ethernet cable (100 ohms) or a decent USB cable (90 ohms) and call it a day. For impedance matching and reflection dampening reasons, RS485 also ...

The PB-T3 PROFIBUS Cable Tester is a universal measuring instrument for analysis, monitoring, error finding and maintenance of PROFIBUS systems. Typical operating ...

Arduino announced a single-pair Ethernet adapter board for its Uno R4 single-board ... The board, in the organisation’s ‘shield’ format, includes an RS485 interface. “By incorporating RS485 ...