Single Port High-Speed USB 2.0 to Serial RS-232 Industrial Adapter w/ FTDI Chipset

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Single Port High-Speed USB 2.0 to Serial RS-232 Industrial Adapter w/ FTDI Chipset

Model No. USBG-COM-M

RS-232 | 512 Bytes Receive | 512 Bytes Transmit | FTDI

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.
Expand Your Serial Capabilities: Connect a legacy 9-pin serial device through a USB-A port to add legacy functionality to newer technologies with no serial port connections.
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
LEDs: Power, TX / RX

$46.49

Model No. USBG-COM-M

In stock

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Product Documentation

Software & Drivers

FTDI Driver

Quick Links:

Description

Introduction:

The USB-COM-M USB 2.0 to Serial RS-232 Adapter is designed with an industrial metal housing with built-in surface mounting flanges to make serial port expansion quick and simple within rough environments.

Connecting to a USB port on your host computer or USB hub, the USB 2.0 to Serial Adapter instantly adds one RS-232 serial communication port to your system by taking advantage of the USB bus. The high-speed Industrial USB 2.0 to Serial Adapter makes it easy and convenient to add an additional RS-232 serial port with DB-9 Male connector and serial device to your system with plug-and-play and hot plug features.

By plugging the USB 2.0 to Serial Adapter to an available host USB port, the adapter is automatically detected and installed, no configuration is necessary with IRQ or COM port conflicts. The USB-COM-M serial adapter does not require any additional IRQ, DMA, or memory as resources on the system. The Industrial USB to Serial Adapter is self-powered.

This USB 2.0 to Serial Adapter provides instant connectivity with modems, ISDN TAs, PDAs, handheld & pocket PCs, digital cameras, POS, serial printers giving RS-232 modem control signals and hardware/software flow control. It is suitable for remote access, retail and industrial applications, data collection and other applications requiring high speed RS-232 serial communication ports.

Features:

Adds one industrial RS-232 serial port by connecting to a USB port
Installed as standard Windows COM port
SECC metal chassis with built-in surface mounting flanges (DIN rail compatible with DIN-RAIL-CLIP)
Full RS-232 modem control signals and hardware/software flow control
RS-232 data signals: TxD, RxD, RTS, CTS, DSR, DTR, DCD, RI, GND
High speed serial port with the baud rate up to 921.6K bps
512 byte transmit FIFO & 512 byte receive FIFO
Non-standard baud-rates supported
LED’s of Power, TxD and RxD for easy port monitoring and diagnostics
Serial port protected with surge protection of 15KV
Powered by USB port, no external power adapter required
Easy plug and play installation and RS-232 device connection
COM port number assigned can be changed to any COM port number required
Chipset: Utilizes an FTDI CHIPSET FT232BL
Baud Rate: 300 bps up to 921.6k bps (user configurable)
Dimensions: 82mm x 76mm x 23mm (with mounting flanges)
Works with USB 1.1 & 2.0 host port

OS Support:

Windows 7, 8, 8.1, 10, and Windows 11
Linux and Mac OS 10.X

Package Contents:

USB 2.0 to high-speed serial adapter
USB A to B cable
Driver Disc

*Surface Mounting screws not included.

Specifications

Product Specifications

Power	Bus Power Support: N – External Power Required
Compliance	Country of Origin: Taiwan Certifications: TAA, REACH, RoHS
Physical Characteristics	Color: Black Item Dimensions (L × W × H): 3.23 × 2.99 × 0.91 in. Item Weight (Oz.): 0.293 lbs. Mounting Style: Din-Rail, Din-Rail (Optional Bracket), Din-Rail Mount, Surface Mount Ports: 1 Serial Port Material of Construction: Steel Screw Lock Compatible: Yes
Serial Attributes	RS Signals: CTS, DCD, DSR, DTR, GND, RI, RTS, RXD+, TXD+ Serial Standards: RS232 Serial Baud Rate Maximum: 1Mbps FIFO Receive: 512 bytes FIFO Transmit: 512 bytes Data Bits: 7, 8 Serial Parity: None, Even, Odd, Mark, Space Stop Bits: 1, 2 Flow Control: Hardware (RTS, CTS), XON/XOFF Serial Port qty: 1
What's in the Box	Package Contents: Driver/Software Disk, USB Cable, USB Serial Adapter
Software	OS Support / Compatibility: Windows 11, Windows 10, Windows 8, Windows 7, Windows Vista, Windows XP, Mac OS, Linux
Environmental	Operating Temperature Range: 0C ~ 55C Storage Temperature: -20C ~ 75C Humidity: 5% to 95% RH
Product Information	Warranty: One Year
Hardware	Chipset: FTDI LED Indicators: Power, TX / RX Upstream Port Types: 1 Type-B Female USB
Performance & Safety	ESD Protection: 15kV
Additional Details	UPC: 729440690724 Connector: DB9 Male w/ Nuts Chip Model: FT231XQ-R, ZT213LFEA USB Specification: USB 2.0 (480Mbps) Weight: 0.6500 lbs Dimensions: 5 × 4 × 2.5 in

UPC: 729440690724

Pin-Out

DB9 RS-232 Pin-Outs

Accessories & Replacement Parts

The USB 2.0 to serial adapter has certain accessories that work with it. These accessories are what you can order if needed.

Out of stock

Serial Cable RS232 DB9 Male to Female 5ft

RS232 Male to Female Serial Data Cable Complete your serial data connection with this 5ft. RS232 DB-9 Male to Female data cable for fast reliable…

Model# 9DBMF5FT

$2.99

Out of stock

6ft. Black USB 2.0 A to B Device Cable

USB 2.0 Cable for Close Connections Enhance your connectivity with our USB 2.0 Type-A to Type-B cable, perfect for linking your desktop or laptop to…

Model# AB6FT-B

$7.29

In stock

Add to cart

DIN-Rail-Clip For USBGear, SerialGear, Cablemax, or CoolGear Adapters

DIN Rail Mount Gives DIN Rail Mounting capabilities to USB to serial adapters, IP Adapters, or Ethernet servers that are designed for mounting applications. For…

Model# DIN-RAIL-CLIP

$9.29

In stock

Add to cart

10ft. Black USB 2.0 A to B Device Cable

USB 2.0 Cable for Close Connections Enhance your connectivity with our USB 2.0 Type-A to Type-B cable, perfect for linking your desktop or laptop to…

Model# USBG-AB3B

$9.29

In stock

Add to cart

Support

Product Documentation & Drivers

Product Documentation

Software & Drivers

FTDI Driver

Need drawings, CAD files, or other compliance documentation? Click HERE

Serial F.A.Q.

Product F.A.Q.

View frequently asked product questions below. For all serial troubleshooting, visit this page.
Still need help? Reach out!

Do these adapters require an external power supply?
Most of our single and dual-port models are USB bus-powered. High-density rackmount models (8-port+) feature integrated or external power supplies for maximum signal integrity.
What is the difference between an isolated and non-isolated serial adapter?
Isolated adapters use optical barriers to physically separate the electrical signals. This protects your computer from 2,500V surges and ground loops common in factory environments.
Can I use these adapters with Windows 11?
Yes, all Coolgear Serial adapters use modern FTDI or Silabs chipsets with WHQL-certified drivers for full Windows 11, Mac, and Linux support.
What is COM Port Retention and why do I need it?
COM Port Retention ensures that your assigned COM port number remains the same every time you plug in the adapter or reboot your PC. This prevents software communication errors and eliminates the need to manually reconfigure your application settings whenever hardware is moved.
How do I clean and reinstall my FTDI drivers?
View Answer
1. Download the CDM Uninstaller HERE.
  
  Extract the zip file, or open the “CDMuninstallerGUI.exe” utility.
  
  Leave the ‘Vendor ID’ set to 0403 and ‘Product ID’ set to 6001.
  
  Click Add.
  
  Click Remove Devices.
  
  Download the corresponding driver for your operating system and follow on-screen prompts. Windows Driver | MacOS Driver
Video tutorial here.
How can I change my device’s COM port?
View Answer
1. Click on Start and navigate to the Control Panel
  
  Locate and click on Device Manager
  
  Under “Ports (COM & LPT)” you will find your serial device titled “USB Serial Port” along with its current COM Port.
  
  Right click on “USB Serial Port” and click on Properties.
  
  Navigate to the “Port Settings” tab and click on “Advanced…”
  
  Once there, the “COM Port Number:” can be changed with a dropdown menu to select the port number.
  
  Click your desired port number (i.e. COM2) and click “OK”.
  
  Click “OK” once more.
  
  Your serial device is now assigned to your chosen COM Port.
How do I check to ensure the COM port is listed properly in Windows?
View Answer
To ensure your serial device is installed properly, complete the following:
1. Press Windows Key + R to open the Device Manager. Once Run comes up, type “devmgmt.msc” into the text field and press Enter.
2. Expand the section labeled, Ports (COM & LPT).
3. You should now see a COM number in brackets to the right of each port. If the device is installed properly, no exclamation points or question marks should be present next to the device.
I have everything hooked up, but nothing is functioning correctly.
View Answer
To rule out potential issues, quickly test your individual components to ensure that they are working correctly individually, and are not the source of the problem:
- Serial cables
- Serial ports
- Serial devices
Test your components by:
- Hook up the serial cable(s), serial port(s), and serial device(s) in a different setup to see if the issue stems from a particular component, or the setup as a whole.
- Replace the serial cable, port, or device within your setup to further troubleshoot the issue’s origin.
When testing cables:
- Test each cable individually.
- Use short cables when you are testing.
When testing serial ports and devices:
- Press the Windows key + R, in Run, type devmgmt.msc, and press Enter to open the Device Manager. You can then check to see if your device is listed under Ports (COM & LPT).
- Ensure that the COM port number is the correct number for the serial device and that the software being used to connect the computer to the serial device uses the correct COM port number.
- If the device is listed with an error, follow the instructions on the website to reinstall the drivers.
Serial communication is not functioning correctly, how can I tell if the problem caused by the adapter or my serial software application?

View Answer
Older serial communication applications make use of legacy hardware addresses, often incompatible with PCI, PCIe, and USB to Serial products. Contact the software provider to troubleshoot.
I am receiving an error when I try to install the drivers in Windows 8 64 bit.
View Answer
Driver Signature Enforcement in Windows 8 may need to be disabled in order to use various drivers. After disabling this feature, the driver will be allowed to install.

Note: You are required to restart your computer after disabling the Driver Signature Enforcement. Save all open work on your computer.

Disable driver signature enforcement:
1. Press the Windows key + C.
2. Click Settings > Change PC Settings.
3. In the left pane, click General.
4. In the right pane, under Advanced startup, click Restart now.
When your system restarts:
1. Click Troubleshoot > Advanced options > Startup Settings > Restart.
2. Press 7.
When your computer restarts, Driver Signature Enforcement will be disabled and you can install the drivers.