USB-COMi-SI USB to RS422/485 Isolated 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-SI-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, 7, Linux 2.4.0 & later, OpenBSD 2.9 and later & MAC OS8 & later.

This model supplies Optical Isolation & Surge Protection.

Each RS-422/485 port is individually optically isolated with 2000 volt DC optical isolation. The optical protects your PC or notebook from spikes and surges on the RS-422/485 network, by converting the electrical pulse into an optical signal and then changing it back into an electrical pulse. Your computer is well protected, since the surges and spikes cannot cross the optical link.

Each RS-422/485 port is individually protected by surge protector to withstand electrostatic discharge and power surges up to 25KV ESD. Surge suppression on all signals prevent damages caused by lighning and high voltage.

Package Contents:

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