RS232 to RS485 Interface Serial Adapter
Chipset: STM485-C
Compatible with EIA/TIA RS232 & RS485 standard.
It can convert RS-232 signal to RS-485 balanced differential signal .
It uses a particular pump to gain power from RS-232 signal, without initializing the RS-232 series interface.
The RS-232 interface is DB9 female connector.
The RS-485 interface is with DB9 male connector with optional terminal board.

Features:
    Transmission rate: 300 – 115200bps
    Communication protocal: Transparent
    RS-485 signal: Date+, Date-, GND
    RS-232 signal: TXD, RXD, RTS, CTS, DTR, DSR, DCD, CND
    Transmission distance: RS-485 (max. 1200m); RS-232 (max. 5m)
    Working mode: asynchronous, half-duplex, differential transmission
    Transmission media: common wire, double wire, UTP or Shielding Line.
    Working environment: -10 ~ 85°C
    Relative humidity: 5% – 95%