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Home / / USB-COMi-SI-M USB-to-Optical isolated RS-422/485 Industrial Adapter

USB-COMi-SI-M USB-to-Optical isolated RS-422/485 Industrial Adapter

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Manufacturer: USBGEAR
Barcode: 34523453424
Part Number: USB-COMi-SI-M
Warranty: ONE YEAR
In Stock: Yes
Ship Weight: 1 lbs.
Size: 3ft. Cable
Compatability: ITEM DESIGNED and Tested with SYSTEM

Item Works with Windows 98Second Edition Item Works with Windows ME Item Works with Windows 2000 Item Works with Windows XP Item Works with Windows VISTA Item Works with Windows 7 Operating System

Our Price: $99.78
Quantity Discount(s)
Quantity Discount: 12 + $87.66 24 + $83.99
We Accept Visa Master Card And American Express as Well as Purchase Orders!
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Product Description

USB-to-Industrial Adapter

Optical isolation & surge protection

USB to 422/485 Adapter

  • - Metal case with DIN-Rail

  • - External DIP switch to select different

    Mode without the need to open chassis

  • - With both terminal block & DB9 connector

  • - Optional 5V power output for serial devices

    Requiring power

    USB-COMi-SI-M USB to RS-422/485 Adapter

    (with Optical Isolation & Surge Protection)

    The USB-COMi-SI-M USB-to-Optical isolated RS-422/485 Serial Adapter is designed

    to make serial port expansion quick and simple. Connecting to a USB port on your

    computer or USB hub, the USB Serial Adapter instantly adds a RS-422, or RS-485

    serial communication port to your system. By taking advantage of the USB bus, the

    USB Serial Adapter makes it easier than ever to add serial ports and serial devices

    to your system with easy plug-and-play and hot plug features.

    By plugging the USB Serial Adapter to the USB port, the adapter is automatically

    detected and installed. There are no IRQ & COM port conflicts, since the port dont

    require any additional IRQ, DMA, memory as resources on the system. The adapter

    is powered by the USB port, and no external power adapter is required.

    The adapter is designed with an external 4-pin dip switch to set RS-422 or RS-485

    mode conveniently, without the need to open the metal chassis. Both a 6-pin

    terminal block and a DB9 male connector are available for optimal flexibility for

    serial connection. The adapter also provides a unique feature of supplying power

    output of 5V/150mA through pin-5 of the terminal block to serial device. The adapter

    is with DIN rail bracket for industrial environment. Termination and biasing option

    are available for data transmission lines.

    Optical isolation and surge protection are available to USB-COMi-SI-M. The serial

    line of RS-422/485 port is optically isolated with 2000 volt DC optical isolation. The

    optical isolation protects your PC 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. The surges and spikes cannot cross the optical link.

    The adapter is built-in surge protector to withstand electrostatic discharge and

    power surges up to 25KV ESD.

    The USB-to-RS-422/485 Adapter provides instant connectivity to RS-422, RS-485

    communication devices for POS, factory automation equipment, multi-drop data

    collection devices, bar code readers, time clocks, scales, data entry terminals, PC to

    PC long distance communications, ATMs and serial communication in harsh

    environments. The USB-COMi-SI-M USB to Industrial I/O provides industrial solution

    requiring single node or multi-drop communications over short and long distance.

    Complete drivers support Windows Vista, XP, 2003, 2000, ME and 9x.

    Features & Specifications

    Model No.: USB-COMi-SI-M

    Adds one RS-422, or RS-485 serial port

    by connecting to USB port

    Installed as standard Windows COM


    2000V DC optical isolation protection

    25KV ESD surge protection

    RS-422 data signal: Tx-, Tx+, Rx+, Rx-,

    GND, RTS-, RTS+, CTS+, CTS-

    RS-485 data signal:

    4-wire: Tx-, Tx+, Rx+, Rx-

    2-wire: data-, data+

    FIFO: 128 byte transmit buffer

    384 byte receive buffer

    Serial port speed up to 230K bps

    One DB9 male connector & one 6-pin terminal block

    Supplies power output of 5V/150mA through pin-5 of terminal block for serial

    devices requiring power.

    Full hardware and software flow control

    Automatic transmit buffer control for 2-wire RS485 half-duplex operation

    2KV DC optical isolation protection

    ESD surge protection (25KV)

    Monitor LEDs of Power, TxD, RxD indicating power & port status

    One external dip switch for easy RS-422, RS-485 mode settings

    -no need to open chassis to set the mode

    -RS-422 mode: 4-wire with handshaking ON, ON, OFF, OFF

    -RS-485 mode: 4-wire full duplex ON, OFF, OFF, OFF, OFF

    -RS-485 mode: 2-wire half duplex with echo OFF, OFF, OFF, ON

    -RS-485 mode: 2-wire half duplex without echo OFF, OFF, ON, ON

    Serial Communication Parameters

    -Parity: None, Even, Odd

    -Data bits: 7, 8

    -Flow control: RTS/CTS

    Built-in 120 Ohm termination resistors for Tx/Rx/CTS termination

    Built-in 750 Ohm biasing resistor for Tx/Rx biasing

    USB cable of 0.9 meter included

    Powered by USB port. No external power adapter required.

    Easy plug & play installation and RS-232/RS-422/RS-485 device connection

    Works with USB 1.1 & 2.0 host port

    SECC sheet metal chassis with DIN rail bracket

    Dimensions: 57mm x 76mm x 23mm

    82mm x 76mm x 23mm (with DIN rail bracket)

    COM Port Number can be changed to COM1 to COM4 to support HyperTerminal,

    or any other COM port number required

    Supports Windows XP, 2003, 2000, ME and 9x

    Full Details PDF File

    User Guide

    Important Technical Information:
  • Features & Specifications:
  • Easy plug-and-play installation
  • Installed as a standard COM port
  • Full modem control signals & data signals supported
  • Serial port speed up to 230,400 bps or 921,600 bps depending on the model.
  • 384 byte receive / 128 byte transmit buffering.
  • USB cable included
  • The USB-COM series items support Windows 98, ME, 2000, XP, Apple MAC OS8 or higher, Linux 2.4.0 and later, OpenBSD 2.9 and later & FreeBSD 4.7 and later. Drivers for the Windows operating systems are included on a CD-ROM disc. The latest versions of the Windows drivers as well as the drivers for Apple OS8/OS9/OSX, & Windows CE.NET (version 4.2 or greater) can be downloaded from
  • Linux, OpenBSD and FreeBSD support the adapters directly, so no driver is necessary.

  • USB to Industrial Adapter Optical isolation surge protection USB to 422 Adapter Metal case with DIN Rail

    usb serial adapter from $19.95 only at serial adapter source