Theoretical knowledge is lacking in time, but practice has proved that the terminal resistance is necessary. I wound two 0.5 square wires into a simple twisted pair without connecting the terminal resistance. After the resistance is interrupted, there is no garbled phenomenon. Theoretical proof will continue when there is time.
The importance of 120 ohm terminal resistance in CAN, RS485 bus
Guess you like
Origin http://43.154.161.224:23101/article/api/json?id=325601192&siteId=291194637
Recommended
Ranking