HY-815 RS232 to RS422/485 Industrial mini universal interface converter
1.Exquisite mini-sized with DB9 connector and wiring post connector.
2.Compatible with RS-232 and RS-485 standards of EIA/TIA.
3.Automatic data transceiver without external volume control signal  (RTS).
4.Power supply Unique adoption of serial charge pump without external
    power supply, and three-line (TXD, RXD and GND) communication
5.without necessity for initialization of the serial ports to obtain power supply.
6.A maximum connection of 32 pieces of network devices.
7.Communication distance: 1.2 KM
8.Communication rate: 300BPS-115.2KBPS
9.Transmission media: twisted-pair cable or shielded cable.
10.Working modes: applicable for both asynchronous half duplex (RS-485)
    and asynchronous full duplex (RS-422) without any jumper settings needed.
11.Plug-and-play and universally applicable on all the existing communication software.
12.Dimensions: 63mmX33mmX17mm.
13.Working environment: -40 to 85degree, relative humidity 5% to 95%.
14.Supporting DOS/WIN95/WIN98/WIN2000/NT/XP and Linux, etc.