The TRP-C08S is one standard USB 2.0 to?Serials?Bridge that has one DB-9 RS232 male connectors and 4 PIN screw terminal for RS422/485. The DB-9 pin serial port is configured as a DTE (data terminal equipment) device which is same as all PC COM ports. The RS422/485 with auto configuration in data format, baud rate and RS485 data flow direction control. RS422/485 equips with 3000VDC of isolation and internal surge-protection on each data line, it gives the host computer and module itself entirely protection from destructive voltage spikes and danger of unregulated voltages input. TRP-C08S?also features a high-speed?921.6?K?bps?transmission rate, and supports various O.S. The industry DIN rail?and?panel mounting design?enable?user a?fast and professional installation.