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USB to Serial Adapter
High Speed USB Serial RS-232 FTDI CHIPSET Adapter for all Windows, Apple or Linux Computers
FROM $19.99

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USB-8COMi-RM USB to Octal RS-232/422/485 adapter metal case w/DIN-Rail

Color: BEIGE Size\Length: 3ft. Cable Part No.USB-8COMi-RM

This Industrial Grade Rack Mount 8-Port USB Serial Adaptor Metal Case with Built-In 100-240Volt Power Supply uses FTDI chip USB serial Converters part number FT2232C, More information on this Chip at

USB-8COMi-RM USB to Octal RS-232/422/485 Adapter

The USB-8COMi-RM USB-to-Octal RS-232/422/485 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 eight RS-232, or RS-422, or RS-485 serial communication ports 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 ports don't require any additional IRQ, DMA, memory as resources on the system. The adapter is self-powered, and has built-in switching power supply of 100V/240V (input) inside the chassis.

The adapter is designed with eight external 4-pin dip switches to set RS-232, RS-422 or RS-485 mode conveniently, without the need to open the metal chassis. Each port can be independently set to RS-232, RS-422, or RS-485, depending on your requirement in application. The adapter is with DIN rail bracket for industrial environment. The adapter can be also mounted to a 19" rack, and the rack mount kits are included with the adapter. Termination and biasing option are available for data transmission lines. The USB-to-Octal RS-232/422/485 Adapter provides instant connectivity to RS-232, 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-8COMi-RM 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 & Specification

  • Model No.: USB-8COMi-RM
  • Adds eight RS-232, or RS-422, or RS-485 serial ports by connecting to USB port
  • Installed as standard Windows COM port
  • Full RS-232 modem control signals
  • RS-232 data signals: TxD, RxD, RTS, CTS, DSR, DTR, DCD, RI, GND
  • 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
  • Eight DB9 male connector
  • Full hardware and software flow control
  • Automatic transmit buffer control for 2-wire RS485 half-duplex operation
  • ESD surge protection (15KV)
  • Monitor LEDs of Power, TxD, RxD indicating power & port status
  • Four external dip switches for easy RS-232, RS-422, RS-485 mode settings
  • no need to open chassis to set different modes
  • RS-232 mode: OFF, ON, ON, ON
  • RS-422 mode: 4-wire with handshaking ON, ON, ON, ON
  • RS-485 mode: 4-wire full duplex ON, OFF, ON, ON
  • RS-485 mode: 2-wire half duplex with echo ON, OFF, OFF, ON
  • RS-485 mode: 2-wire half duplex without echo ON, OFF, OFF, OFF

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
  • Built-in switching power supply of 100V~240V
  • 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: 257 mm x 152 mm x 44 mm 277 mm x 152 mm x 44 mm (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 10, 8.1, 8, 7, Vista, & XP.
  • Supports OSX & Linux


Full Details PDF File User Guide

Compatibility:  ITEM DESIGNED and Tested with OPERATING SYSTEM
Item Works with MAC Operating System OS 9.1 or Higher    Item Works with Windows ME  Item Works with Windows 2000  Item Works with Windows XP     
  • 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 http://www.ftdic FT245Drivers.htm.
  • Linux, OpenBSD and FreeBSD support the adapters directly, so no driver is necessary.
  • Manufacturer: USBGEAR
    Warranty: ONE YEAR
    In-stock: Yes
    Size\Length: 3ft. Cable
    Color: BEIGE
    Our Low Price $279.78    Quantity Discount: 12 + $277.66 24 + $269.99
    QTY:      ITEM AVAILABLE TO SHIP SAME DAY!   We Accept Visa Master Card And American Express as Well as Purchase Orders!
     Similar Products Available:
     USB-16COM-RM...USB to Serial 16-Port RS-232 Adapter metal case w/DIN-Rail..$349.89  
     USB-4COMi-SI-M...USB-4COMi-SI-M USB to Quad RS-422/485 Metal case with DIN-Rail..$249.78  
     USB-COM-M...USB to Serial 2.0 High-Speed USB RS-232 Industrial Adapter w/DIN-Rail..$34.25  

    Have Questions? Our Tech Guys Can Help!
    Support Center Hours: 10AM EST - 6 PM EST Monday - Friday Only!

    GET Pre-Sale Help FOR Item USB-8COMi-RM



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