USB-COMi USB to RS422/485 Converter

This USB Serial Adapter is designed to make serial port expansion quick and simple. Connecting to a USB port on your computer or USB hub, this USB Serial Adapter instantly adds a RS422/RS485 serial communication port to your system with easy plug-and-play and hot-plug features.

Plugging the USB Serial Adapter into the USB port, the adapter is automatically detected and installed. There is no IRQ & COM port conflicts, since the port doesn't require any additional IRQ, DMA or memory on the system. The RS-422/485 serial port functions as a native Windows COM port, and it is compatible with Windows serial communication applications.

This USB Serial Adapter provides instant connectivity to any RS-422 or RS-485 communication device.

Specifications & Features:

• Adds a high speed RS-422/RS-485 serial port via a USB 1.1 or 2.0 connection
• 384 byte receive buffer.
• 128 byte transmit buffer for high speed data throughput.
• Requires no IRQ, DMA or I/O port.
• Data rate speed range: 300 bps to 921,600 bps
• Serial Connector: DB-9 male connector
• Supports RS-422 Full Duplex and RS-485 Half Duplex modes. If you need RS-485 Full Duplex, please get the USB-COMi-M model.
• RS-422 data signals: Tx-, Tx+, Rx+, Rx-, GND, RTS-, RTS+, CTS+, CTS-.
• RS-485 data signals: Rx-, Tx+, Rx+, Rx- (r wire), and data-, data+ (2 wire).
• Uses an FTDI brand chipset.
• Virtual COM port drivers provided for Windows 98, 98SE, ME, 2000, 2003, XP, Vista, Linux 2.4.0 & later, OpenBSD 2.9 and later & MAC OS8 & later.

Signal Pinout information:

RS-422 Signal Pin-outs of the DB-9 Male connector:
Pin 1: Tx-(A), Pin 2: Tx+(B), Pin 3: Rx+(B), Pin 4: Rx-(A), Pin 5: GND, Pin 6: RTS-(A), Pin 7: RTS+(B), Pin 8: CTS+(B), Pin 9: CTS-(A)

RS-485 2-Wire (Half Duplex) Signal Pin-outs of DB-9 Male connector:
Pin 1: Data-(A), Pin 2: Data+(B), Pin 5: GND

Package Contents:

• USB to RS422/RS485 serial adapter
• 3-foot USB cable
• CD-ROM disc with drivers
• User's Manual