DB-9 Version USB to RS-232 / RS-422 / RS-485 Adapter The USB to serial interface adapter offers an easy way to connect a DB9 serial device to a USB port. All configuration and electrical interface selections are handled through the driver, eliminating the need to open the enclosure to set jumpers or switches. The serial port is software configurable for RS-232, RS-422, and RS-485 with the electrical interface settings maintained locally, allowing the host computer to be repaired or upgraded without reconfiguring the serial port. Additionally, the adapter can be configured at one computer and deployed to other computers. Features Full compliance with the USB Specification 2.0 & 1.1 RS-232 / RS-422 / RS-485 ( Echo mode / Bias resister / Terminal resister ) set up by Windows application program Bus powered, no external power required Support 32 Node on the network High data rate up to 230 kbps ( RS-232 ) ~ 3 M Baud ( RS-422 or RS-485 ) ±15kV HBM ESD Protected Compatible Windows 98SE / ME / 2000 / XP / Vista / 7 / 8 and higher, Windows Server 2003 / 2008 / 2008R2 , Win CE and Mac OS 8.6 , Linux 1.5.0 and higher Model No. DB-9 Male Pin Assignment RS-232 RS-422 RS-485 Pin No. Definition Definition Definition Chip FTDI 1 DCD TX- D- Data Rate RS-232 230 Kbps 2 RXD TX+ D+ RS-422 / RS-485 3 M Baud 3 TXD RX+ LED 3 4 DTR RX- Connector Host USB Type A Male 5 GND GND GND Device DB-9 Male 6 DSR RTS- Compliant USB Spec. 2.0 / 1.1 7 RTS RTS+ Housing Plastic 8 CTS CTS+ Dimension ( L x W x H ) 66 x 39 x 20 mm 9 RI CTS- User Guide