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USB 2.0 to RS-232/422/485 Selectable Industrial Serial Adapter w/ 15kV ESD Surge Protection

Part # USBG-COMi-M

Status: Available

RS-232 | RS-422 | RS-485 | 512 Bytes Receive | 512 Bytes Transmit

  • Superior Build Quality: Housed in a rugged steel chassis with built in mountable flanges, the serial adapter hub is perfect for installations in labs, warehouses, or heavy machinery.
  • Safe Industrial Connections: Designed for use with Bar Code Scanners, Time Clocks, Label Printers, Point of Sale Terminals, Receipt Printers, and more the USB to Serial Adapter offers 15kV surge protection for connected devices.
  • Effortless Port Configuration: The adapter is designed with external dip switches to set RS-232, RS-422 or RS-485 ports and different operation modes conveniently.
  • COM Retention: COM Ports are fully configurable, and after reboots, port assignments are preserved.
  • USB Power: Power is drawn from a USB connection, no bulky power supply or power outlet is required.
  • Upstream: 1 USB port, Type B Female Connector
  • Downstream: 1 Male DB9, w/ nuts, 1 6-pin Terminal Block
  • LEDs: Power, TX / RX


Product Documentation & Drivers

USB 2.0 to RS-232/422/485 Selectable Industrial Serial Adapter w/ 15kV ESD Surge Protection

Part # USBG-COMi-M
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The USB-COMi-M USB to RS-232 / 422 / 485 Serial Adapter is designed to make quick and easy serial port expansion in a commercial or industrial environment. Using your computer’s.

host USB port or an active USB hub connection, the USB to Serial Adapter instantly adds an RS232, or RS422, or RS485 serial communication port to your system. The USB to RS-232 Serial Adapter is designed with easy mode switching via DIP switch and installs using Plug-and-Play features with hot plug functionality.

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-232, 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.

This USB to RS-232 / 422 / 485 adapter also provides a unique feature of supplying power output of 5V/150mA through pin-6 of the terminal block to serial device and is with DIN rail bracket for industrial environment. Termination and biasing options are available for data transmission lines.

The USB-to-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-COMi-M USB to Industrial I/O provides industrial solution requiring single node or multi-drop communications over short and long distance.


  • Adds one RS-232, RS-422 or RS-485 serial port by connecting to a USB port
  • One DB9 male connector & one 6-pin terminal block for optimal flexibility of serial connection
  • Supplies power output of 5V, 150mA through pin-6 of terminal block
  • No need to open chassis to set operation modes-one external DIP switch for easy RS-232, RS-422, RS-485 mode settings
  • Installed as standard Windows COM port
  • SECC metal chassis with DIN rail bracket
  • Full RS-232 modem control signals and hardware/software flow control
  • RS-232 data signals: TxD, RxD, RTS, CTS, DSR, DTR, DCD, RI, GND
  • RS-422 data signals: TxD-, TxD+, RxD+, RxD-, GND, RTS-, RTS+, CTS+, CTS-
  • RS-485 4-wire data signals: TxD-, TxD+, RxD+, RxD-
  • RS-485 2-wire data signals: Data-, Data+
  • Automatic transmit and receive control for 2-wire RS-485 half-duplex mode
  • Built-in termination and biasing
  • High speed serial port with the baud rate up to 921.6K bps
  • Non-standard baudrates supported
  • LEDs of Power, TxD and RxD for easy port monitoring and diagnostics
  • Serial port protected with surge protection of 10KV
  • Powered by USB port, no external power adapter required
  • Easy plug and play installation and RS-232/RS-422/RS-485 device connection
  • COM port number assigned can be changed to any COM port number required
  • Works with USB 1.1 & 2.0 host port

OS Support:

  • Windows 7, Windows 8, Windows 10, and Windows 11
  • Linux and Mac OS 10.X

Package Contents:

  • USB tp RS232 selectable adapter
  • USB 2.0 A to B cable
  • Driver disc

*Surface Mounting screws not included.

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Manufacturer: CoolgearWarranty: 1 YearAvailability: Available
Barcode: 729440690960Ship Weight: 0.58Condition: New
Part Number: USBG-COMi-MColor: BlackLength/Size: in
Port Count: 1Port Type: ArrayInput Voltage: 5V DC
Temperature(Op): 0C ~ 55CESD Protection: 15kvSerial Modes: Array
LEDs: ArrayIsolation: --Chip: FTDI FT231XQ


Manufacturer: Coolgear
Barcode: 729440690960
Part Number: USBG-COMi-M
Warranty: 1 Year
Ship Weight: 0.58
Color: Black
Availability: Available
Condition: New
Port Count: 1
Port Type: Array
Input Voltage: 5V DC
Temperature(Op): 0C ~ 55C
ESD Protection: 15kv
Isolation: --
Serial Modes: Array
LEDs: Array
Chip: FTDI FT231XQ