Converter for RS232 to RS485 2 Wires (half duplex)

[kkdelabaca]

rs485 half duplex from rs232

Hello,

somebody know how convert the protocol RS232 (RX and TX) to RS485 2 Wires (half duplex).


Regards!

 

[klystron]

max232 ttl rs232 half-duplex converter

Convert the RS232 level to TTL using a MAX232 chip
Use the TX line to trigger a re-triggerable monastable.
The output of the monostable is used to switch the RS485 chip to transmit mode.
The period of the monostable is a bit longer than the baud rate.

 

[C-Man]

half duplex+converter+rs232+rs485

Look here:




best regards

 

[christianvillarroel00]

Convertir RS485 4 hilos a 2 hilos

Tengo el siguiente problema: el master es Rs485 a 2 hilos, y los modems(esclavos) son a 4 hilos, tengo que conectarlo.. pero no se como!!, existe la manera de pasar de 4 hilos a 2 hilos en RS485?