25 ++ rs485 a b tx rx 313724-Rs485 a b tx rx
The – (or B), on the middle pin or RS232's TX pin The ground can be connected to the cable shield However, the shield should only be connected at one end of the cable The connection is quite simple, you must connect Pin 5 to DE and RE so you can activate transmission and reception of the data, in the schema I use 10 and 11 pins respectly as RX and TX of SoftwareSerial and you must connecto to RO DI pins of MAX485, than you must attach 5v and GND to the IC pins The resistor Rt (from A and B) is 1ohm, but i usually use 104ohm First working RS485 communication, RX in blue, TX in yellow, DE (data enable) in purple In blue we see the RX signal, in yellow the TX signal and in purple the DE (data enable) signal DE is enabled during the TX phase, however, it stays active for quite awhile Arctic Rs 485 Rs 422 Rs 485 Also Known As Rs 485 Half Duplex Rs Wire Same Pair Is Used To Transmit And Receive Data Only One Device Can Transmit Ppt Download Rs485 a b tx rx
