Other Parts Discussed in Thread: THVD1426, THVD1406
Plesae kindly advise if there are any deivce to implement the RS232 to RS485 interface, or there are any soluton to realize it, thanks.
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There is no single device for this.
You have to combine an RS-232 and an RS-485 transceiver. The RS-232 protocol does not give you a mechanism to control the RS-485's transmitter's DE input, so you have to use a transceiver with auto-direction control (THVD1406/THVD1426).