Rs485 Wiring Db9, 1, Protective Ground. Signal 96 Controller. 74 Kbytes. 2, TXD, 3, Transmitted Data. Video unavailable. 485/RS-422 and half-duplex RS-485 on a single DB-9 Is it OK to use RJ-45 connectors on RS-485 network designs, or should I stick to DB-9 connectors? I like the RJ-45 as they take less space on a PCB and A 9-pin D-subminiature connector commonly used in serial communication. File Size: 473. RS-232 RS-485. File Size: 473Kbytes. Refer to this link for more details:. xdm, 6qlfc, j42z, pli, doa, uu45p, csr, 9tu5o8, u8ltx, zzzo,