1. Compatible with RS-232 and RS-485 standards of EIA/TIA.

2. Automatic data transceiver without external volume control signal (RTS) and

    three-line (TXD, RXD and GND) communication.

3. Communication rate: 300BPS-115.2KBPS

4. A maximum connection of 128 pieces of RS-485 or RS-232 interface devices.

5. Communication distance: 5 KM (9,600BPS)

6. Power indicator light and data traffic indicator light available for malfunction 

    indication.

7. Working mode: Working modes: applicable for both asynchronous half duplex (RS-485) and asynchronous full duplex (RS-422) without any jumper settings needed.

8. Photoelectric isolation (an isolation voltage as high as 2.5KVrms /500VDC

isolation), dedicated DC/DC module, 600W lightning strike and surge protection and +/-15KV ESDprotection and grounding interference protection for each RS-485/422 line.

9. Electric interface: connector from DB9 female to DB9 male.

10. Transmission media: twisted-pair cable or shielded cable.

11. Dimensions: 113mmX55mmX25mm.

12. Working environment: -40℃ to 85℃, relative humidity 5% to 95%.

13. Plug-and-play and universally applicable on all the existing communication

    software.

14. Supporting DOS/WIN95/WIN98/WIN2000/NT/XP and Linux, etc.