Introduction - If you have any usage issues, please Google them yourself
RS-485 interface has the advantages of good noise immunity, long transmission distance and multi station capability, which makes it the preferred serial interface. Because the RS485 interface consists of half duplex network, generally only two connections are needed, so the RS485 interface is shielded twisted pair transmission. RS485 interface connector adopts DB-9's 9 core plug socket, and the intelligent terminal RS485 interface adopts DB-9 (hole), keyboard interface with keyboard, RS485 adopts DB-9 (needle).