DTECH DT-9026 Active RS232 to RS485 RS422 converter Feature:1. Interface characteristic: compatible with the standards of RS-232C and RS-485/RS-422 issued by EIA/TIA.2. Electric interface: DB9 female connector for RS-232 interface input end, DB9 male connector for RS-422/RS-485 interface output end.3. Protection grade: ±15KV ESD protection for RS-232 interface, and 600W surge protection each line