1. Compatible with RS-232 and RS-485, RS-422 standards of EIA/TIA. 2. Automatic data transceiver without external volume control signal (RTS). 3. Communication rate: 300BPS-115.2KBPS 4. A maximum connection of 32 pieces of RS-485 or RS-232 interface devices. 5. Communication distance: 1.2 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), 600W lightning strike 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: 113mm×55mm×25mm. 12. Working environment: -25℃ to 70℃, 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.
