Mini USB 2.0 to RS-232 DB-9 Serial Adapter w/ 15kV ESD Protection & 3ft. USB Extension Cable

USBG-232MINI RS232 Serial Cable Attached

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Mini USB 2.0 to RS-232 DB-9 Serial Adapter w/ 15kV ESD Protection & 3ft. USB Extension Cable

Name: Mini USB 2.0 to RS-232 DB-9 Serial Adapter w/ 15kV ESD Protection &amp; 3ft. USB Extension Cable
Brand: CoolGear
SKU: USBG-232MINI
Price: 25.95 USD
Availability: InStock
Rating: 4.70 (23 reviews)

Rated 4.70 out of 5 based on 23 customer ratings

(23 customer reviews)

Model No. USBG-232MINI

RS-232 | 128 Bytes Receive | 256 Bytes Transmit | FTDI

Expand Your Serial Capabilities: The Mini Serial Adapter can be utilized through an existing USB Port to work with your legacy serial connections. It’s great for newer technologies with no serial port connections.
Safe Connections: Designed with a unique system load reduction feature, the Mini USB to Serial Adapter also offers 15kV surge protection for connected devices.
Upstream: 1 USB port, Type A Male Connector
Downstream: 1 Male DB9, w/ nuts
RS-232 Signals: DCD, RxD, TxD, DTR, GND, DSR, RTS, CTS, RI
Transmit Buffer: 256 Bytes
Receive Buffer: 128 Bytes
LEDs: TX / RX

$25.95

Bulk Pricing

Model No. USBG-232MINI

In stock

Volume Pricing

Units	Discount	Price
1 - 4	—	$25.95
5 - 11	3 %	$25.17
12 - 24	5 %	$24.65
25 - 49	7 %	$24.13
50+	10 %	$23.36

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Product Documentation

Software & Drivers

FTDI Drivers

Quick Links:

Description

Mini USB RS-232 serial adapter banner

Mini USB RS-232 Introduction:

The USBG-232MINI serial adapter uses a Mini USB RS-232 format to synchronize your Handhelds, Digital Cameras, or other device currently using a serial port and works with your legacy serial connections. Connecting your serial devices to the newer computer equipment using USB bus technology gives you an advantage of adding one or more serial devices when needed. This adapter is hot plug compatible via its USB connector. The USBG-232MINI Mini USB RS-232 Serial Adapter is great for newer technologies with no serial port connections.

The high-speed DB-9 serial port with the 128 byte FIFO allows for high-speed communication between devices, even in heavy loaded systems. One of the unique features of this adapter is reduction of the system load. The serial port also allows unusual speed settings like 500.000bps. The USBG-232MINI also comes with a 3 foot USB Extension cable!

Mini USB RS-232 Features:

Adds one RS-232 serial port by connecting to a USB port.
Includes 3 foot USB extension cable.
Compact size cable type converter with cable length of 25 cm
Installed as standard Windows COM port
Full RS-232 modem control signals and hardware/software flow control
Transmit Buffer: 256 bytes
Receive Buffer: 128 bytes
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
Non-standard baudrates supported
LED status indicators for TxD and RxD for easy port monitoring and diagnostic
Serial port protected with ESD 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
Works with USB 1.1 & 2.0 host port
Dimensions: (Adapter only) 65.50mm(L) x37.10mm(W) x 18.80mm(H)

OS Support:

Windows Windows 7,8, 10, and 11
Linux and Mac OS 10.X
Note: As of June 2018 Windows XP is no longer supported. Please contact us if you require Windows XP support.

Package Contents:

Mini USB 2.0 to RS-232 DB-9 Serial Adapter
3ft. USB Type-A Male to Type-A Female Cable

Compatibility List:

GPS / Chartplotters / Fish Finders:

Magellan Sportrak GPS
Garmin GPS III Plus
Garmin eTrex Legend
Garmin 76S GPS
Garmin Rino 120
Garmin Etrex
Garmin GPS V
Peets weather station
Sky Caddie
SkyCaddie SG2 Golf GPS
Humminbird 767
Megellan MAP330

WEATHER STATION:

Oregon Scientific WMR-968
La Crosse WS-3610
Davis Vantage Pro II weather station

AMATEUR RADIO:

Yaseu FT-950 Amateur Radio
Kenwood TM-D710 ham radio
TenTec RX320 shortwave radio receiver
Kenwood TM-D710 dual band Amateur radio

Routers: (Connects to Cisco Console cable)

Cisco 871
Cisco 2900/3900 XL
Cisco ASA5505
Cisco 678 DSL
Cisco 2621XM

MODEMS:

US Robotics Courier dual standard V.34
Zoom 56k external fax modem

Embroidery Machines:

Bernina 180 embroidery machine

OBDII Data Analyers:

Innova 3140 / 3160 OBD2
Equus 3130 Innova Diagnostic Code Scanner
Autel MaxiDAS

Telescopes / Solar Controllers:

TS-60 Morningstar Solar Controller
Celestron 5SE Telescope
Celestron CGEM astronomy tracking mount

POLICE SCANNER RADIO:

Uniden BCD396XT programmable radio
Uniden 780XLT scanner
Uniden Bearcat BC346XT scanner

Stenograph Writers:

Stentura 200SRT
Stentura 400SRT
Stentura 500
Stentura 6000
Stentura 6000LX
Stentura 8000
Stentura 8000LX
WAVE
DIAMANTE

INDUSTRIAL EQUIPMENT:

Brother wire EDM machine
Graphtec plotter

MegaSquirt car tuning
SBC ALIX Firewall
Lynx6 AL5B robot arm (Karmic RC) Matlab 2009b
Pelouze scale
DVDO iScan Duo

CNC Machines:

Strippit HECC80-3 CNC

PlusDeck
Suunto X6HR watch
Altec Digitizer Tablet
Data Logging Digital Multi-meter
Conext uninterrupted power supply
Automation System SLC 500
Keile Micro Controller
SEL-751A relays (needs null modem adapter & acselerator software )
URC remote controls MX-850
Summa Graphics D15 vinyl cutter

AUDIO DEVICES:

Anthem MRX 300 A/V receiver
Anthem MRX 500 receiver
NuVo music system

APRS unit (Byonics RTG
iRobot Create
FreeScale Codewarrior
Technological Arts Adapt9S12C32 MCU
X10 CM11A
Crestron programmer
Zebra Label Printers

Specifications

Product Specifications

Power

Power Source	USB Connector
External Power Required	No

Compliance

Country of Origin

Taiwan

Physical Characteristics

Color	Blue
Item Dimensions (L × W × H)	2.57 × 1.46 × 0.74 in.
Ports	1 Serial Port
Material of Construction	Plastic
Screw Lock Compatible	Yes

Serial Attributes

RS Signals	DCD, RxD, TxD, DTR, GND, DSR, RTS, CTS, RI
Serial Standards	RS232
Baud Rate	921.6K bps
FIFO Receive	128 bytes
FIFO Transmit	256 bytes
Data Bits	7, 8
Parity	None, Even, Odd, Mark, Space
Stop Bits	1, 2
Flow Control	Hardware (RTS, CTS), XON/XOFF
Serial Ports	1

Software

OS Support

Win 11, Linux, Mac OSX, Win 10, Win 7, Win 8

Environmental

Operating Temperature	0°C to 55°C (32°F to 131°F)
Storage Temperature	-20 to 75°C (-4 to 167°F)
Humidity	5% ~ 95% (non-condensing)

Product Information

Warranty

1 year from date of purchase

Hardware

Chipset	FTDI
LED Indicators	TX / RX
Upstream USB Ports	1 Type-A Male USB

Performance & Safety

ESD Protection	15KV Surge Protection
Max Data Transfer Rate	12Mbps

Other Data

Connector	DB9 Male w/ Nuts
Chip Model	FT231XQ-R, ZT213LFEA
USB Interface	USB 2.0
UPC	729440625108
Weight	.2 lbs
Dimensions	3 × 2.5 × .6 in

UPC: 729440625108

Pin-Out

DB9 RS-232 Pin-Outs

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!

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.
I am receiving an error when I try to install the drivers in Windows 10 64 bit.
View Answer
Driver Signature Enforcement in Windows 10 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. Click the Windows icon in the taskbar.
2. Click Power.
3. Press and hold the Shift key and click Restart.
After your computer 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.
Why did the software not install properly in macOS High Sierra (10.13) or later?
View Answer
High Sierra 10.13 and later versions of macOS enforce strict security policy revisions. In order for the device to operate, software packages like those used in this installation must be allowed in macOS Security and Privacy settings once the software is installed.

Once the driver/software is installed, follow these steps to allow the software:
1. Open System Preferences.
2. Open Security & Privacy.
3. Click the Allow button near the bottom of the General tab.

Reviews (23)

23 reviews for Mini USB 2.0 to RS-232 DB-9 Serial Adapter w/ 15kV ESD Protection & 3ft. USB Extension Cable

Rated 5 out of 5

H. Raymond “breadvan” – November 9, 2011

Quality product with a nice build quality, driver installation went smoothly on my Windows 7 x64 notebook. Will buy from manufacturer again.
Rated 5 out of 5

Steve in DFW Texas – November 1, 2011

Plugged it into my system and it has worked like a champ.

Before you use the adapter you’ll want to run “Windows Update” off the Start menu. For Windows 7 you won’t need the mini CD-ROM that comes with the adapter. Run “Windows Update” two separate times because there are two things Microsoft wants to install.
– FTDI – Other hardware – USB Serial Port
– FTDI – Other hardware – USB Serial Converter

After those two software updates are installed you’re ready to use the adapter.
This unit also came with a very nice shielded USB extension cable too. I’m using it for a very old Garmin GPS device. The Garmin software found the serial port very easily.
Rated 5 out of 5

tmanners – September 11, 2011

This serial usb adapter that has the FTDI chipset. The Prolific chipset adapters do not work as well as these. This worked the first time I pluged it in perfectly. If you are having trouble with the prolific chipset adapters, buy this one. I don’t give 5 stars much, but this one is a 5 star item! The price is a little high, but the free shipping makes up for it!

The drivers on the CD it came with i’m sure are fine, but they may be 1 rev behind. I got the latest from the main website.
Rated 5 out of 5

H. Direen – May 23, 2011

I tried 3 or 4 other manufactures of USB to RS-232 adapters and all had issues with the software I was developing. Some USB to RS-232 adapters even blue-screened Windows. This is the only adapter that worked flawlessly. The USBGear device uses the FTDI chipset and has certified Windows drivers. I highly recommend this USB to RS-232 serial adapter.
Rated 5 out of 5

electriccafe – March 23, 2011

There’s a driver CD but it does NOT include Windows-7..

Turns out the CD is still useful.. upon insertion a web page pops up with local driver links AND a weblink to newer drivers at [..]. Meantime the CD plays a little video explaining how to install the adapter and configure COM port settings. Pretty nice!

You don’t need to save the CD since the adapter says ‘USBGEAR’ right on it, so you’ll always know where to get drivers.

5 stars for a nice gadget with good back end support!