Discontinued

USB to RS232 DB9 Serial Adapter Cable - M/M

Add one serial RS-232 port to any laptop or computer with a USB port

Product ID: ICUSB232

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  • USB to Straight-Through RS232 Serial Adapter
  • Easy to setup and install
  • No external power needed - draws power from the USB connection

The StarTech.com ICUSB232 1ft USB to DB9 RS232 Serial Adapter Cable lets you connect DB9 RS232 serial devices to your Mac or PC laptop or desktop computer through a USB port, as though the computer offered an onboard DB9M connector.

A cost-effective solution that bridges the compatibility gap between modern computers and legacy serial peripherals, as well as offering compatibility with nearly all PLC Brands (AllenBradley, Siemens, Modicon, Servos, Indramat, Siemens, AB, etc.).

Backed by a StarTech.com 2-year warranty and free lifetime technical support.

Applications

  • Perfect for IT Administrators looking to add legacy functionality to newer notebooks, PCs and servers that lack an integrated RS232 port
  • Connect a satellite receiver, serial modem, or PDA with serial sync
  • Connect bar code scanners, receipt printers and other point of sale devices
  • Connect, monitor and control industrial/automotive sensors and equipment
  • Connect and program LED and Digital signage boards with serial communication ports
  • Compatible with nearly all PLC Brands (AllenBradley, Siemens, Modicon, Servos, Indramat, Siemens, AB, etc.)

The StarTech.com Advantage

  • Simple installation and operation provides robust serial connectivity to legacy PCs
  • Drawing power from the USB bus saves the hassle of carrying an external power adapter for this add-on serial port
  • Extensive list of compatible operating systems makes this device perfect for almost any RS232 application

Partner Numbers

  • UPC 065030783392

Compatibility

  • Windows 7 logo
  • Mac OS X Mavericks (10.9) logo
  • Linux logo
  • Windows Server 2012 logo
  • Mac OS X Yosemite (10.10) logo
  • Mac OS X El Capitan (10.11) logo
  • Windows 8 logo
  • Windows 10 logo
  • macOS Big Sur (11.0) logo
Windows® 10 (32/64bit), 8 / 8.1 (32/64), 7 (32/64), Vista (32/64), XP (32/64), 2000, ME, 98SE, CE 4.2, 5.2
Windows Server® 2012, 2008 R2, 2003
macOS 10.x, 11.0 (Tested up to 11.0)
Linux 2.4.x - 3.9.x

Specifications

Warranty Information Warranty 2 Years
Connector(s) 1 - Connector Type(s) DB-9 (9 pin, D-Sub)
USB Type-A (4 pin) USB 2.0
Environmental Operating Temperature 0°C to 60°C (32°F to 140°F)
Storage Temperature -20°C to 80°C (-4°F to 176°F)
Humidity 0~65% RH
Hardware Ports 1
Interface Serial
Bus Type USB 2.0
Port Style Cable Adapters
Industry Standards USB 1.1/2.0
RS232
Chipset ID Prolific - PL2303
Packaging Information Package Length 10.5 cm [4.1 in]
Package Width 36 mm [1.4 in]
Package Height 21.4 cm [8.4 in]
Shipping (Package) Weight 90 g [3.2 oz]
Performance Serial Protocol RS-232
Max Baud Rate 921.6 Kbps
FIFO 192 Bytes
Physical Characteristics Material Plastic
Cable Length 30.5 cm [12.0 in]
Product Length 37 cm [14.6 in]
Product Width 34 mm [1.3 in]
Product Height 18 mm [0.7 in]
Weight of Product 81.6 g [2.9 oz]
Software OS Compatibility Windows® 10 (32/64bit), 8 / 8.1 (32/64), 7 (32/64), Vista (32/64), XP (32/64), 2000, ME, 98SE, CE 4.2, 5.2
Windows Server® 2012, 2008 R2, 2003
macOS 10.x, 11.0 (Tested up to 11.0)
Linux 2.4.x - 3.9.x
What's in the Box 1 - Included in Package USB to Serial Converter
User Manual

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Drivers/Downloads

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Driver(s):

Manual(s):

Datasheet

Product Support

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Frequently Asked Questions

Installation

Prior to installing this device, ensure that your operating system is up to date (for example, you have installed the most recent service pack).

To install the driver:

  1. Download the latest drivers from the StarTech.com website (http://www.startech.com/Support). You can find the part number and product ID on the product’s packaging.

Note: Windows will typically save the files to the Downloads folder that is associated with your user account (for example, C:\Users\your_name\Downloads).

  1. Once the download is complete, right-click the zip folder that you downloaded, select Extract All, and follow the on-screen instructions.
  2. In the list of extracted files, right-click the Setup.exe file and select Run as Administrator.

Note: If the Run as Administrator option is not available, you might be attempting to run the installer from within the zipped file. Extract the files using the instructions in Step 2.

  1. Follow the on-screen prompts to install the device drivers and restart the computer when prompted.
  2. Once Windows has restarted, connect the USB serial adapter to your computer.
  3. Your computer will automatically complete the driver installation and your device should be ready to use.

Prior to installing this device, ensure that your operating system is up to date (for example, you have installed the most recent service pack).

To install the driver:

  1. Download the latest drivers from the StarTech.com website (http://www.startech.com/Support). You can find the part number and product ID on the product’s packaging.

Note: Windows will typically save the files to the Downloads folder that is associated with your user account (for example, C:\Documents and Settings\your_name\My Documents\Downloads).

  1. Once the download is complete, right-click the zip folder that you downloaded, select Extract All, and follow the on-screen instructions.
  2. In the list of extracted files, double-click the Setup.exe file.
  3. Follow the on-screen prompts to install the device drivers and restart the computer when prompted.
  4. Once Windows has restarted, connect the USB serial adapter to your computer.
  5. Your computer will automatically complete the driver installation and your device should be ready to use.

Troubleshooting

When you troubleshoot issues with a serial device, there are some quick tests that you can complete to rule out potential problems. You can test to make sure that the following components are working correctly and are not the source of the issue:

  • Serial cables

  • Serial ports

  • Serial devices

To test your setup components, try the following:

  • Use the serial cable, serial port, and serial device in another setup to see if the problem is with the components or the setup.

  • Use a different serial cable, serial port, and serial device in your setup to see if the problem persists. Ideally, you should test a component that you know works in another setup.

When you test your cables, it is recommended that you do the following:

  • Test each cable individually.

  • Use short cables when you are testing.

When you test the serial ports and serial device, it is recommended that you do the following:

  • Press the Windows key + R, type devmgmt.msc, and press Enter to open Device Manager. Check to see if your device is listed under Ports (COM & LPT).

  • Make sure 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.

Note: Some serial devices work only if the COM port number is between a certain range. For example, COM1 to COM4.

To check whether or not an RS-232 serial port is working, perform an RS-232 loopback test by doing the following:

  1. If your serial port is not female, convert it by taking a female/female cable or gender changer and plugging it into the serial port.
  2. Take a metal paperclip or wire and cross pins 2 and 3. If you look closely at the female end, the pins should be numbered.
  3. Open a telnet session on the COM port number of the device that you are testing. To find out the COM port number, refer to the following FAQ: https://www.startech.com/faq/com-port-listing-windows.

Note: To open a telnet session on the COM port, you need a telnet client like PuTTY or Hyper Terminal. Windows XP comes with Hyper Terminal.

  1. When the session is open, anything you type into it you should see. The loopback test fails when you cannot see what you are typing.

If the loopback test fails, make sure that the serial cable or gender changer that you are using works and that the adapter is in the correct port. 

You can check multiple ports at the same time by opening multiple sessions, putting the loopback adapter on one port, and trying to type into each session.  When you can see what you are typing, you know that the COM port is working and you can see which port number the physical serial port is. Close the window for the port that you just tested to speed up the testing of the remaining serial ports.

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How To

To confirm that Windows detects your USB device, complete the following:

  1. Press the Windows key+R, type devmgmt.msc, and press Enter.
  2. In Device Manager, under the appropriate heading, confirm that your expansion card is listed and that there isn't an exclamation mark next to it.  For example, a USB controller card would be under Universal Serial Bus controllers.

Your USB device is listed according to the name of the chipset. To determine the name of the chipset of your USB device, navigate to www.StarTech.com and look on the Technical Specifications tab for your product.

To confirm that the Mac OS detects your USB device, complete the following:

  1. Click the Apple icon.
  2. Click About This Mac.
  3. Click More Info or System Report.
  4. Under the appropriate heading, confirm that your USB device is listed and that there isn't an error. For example, a network card would be under Ethernet Cards.

You may need to refresh the System Information page after you plug in your device.  To do so, press Command R with the System Information page open.

Your USB device is listed according to the name of the chipset. To determine the name of the chipset of your USB device, navigate to www.StarTech.com and look on the Technical Specifications tab for your product.

Compliance and safety

Compliance letters

  • RoHS
    • Language: English
  • WEEE
    • Language: English

Safety Measures

  • If product has an exposed circuit board, do not touch the product under power.
  • If Class 1 Laser Product. Laser radiation is present when the system is open.
  • Wiring terminations should not be made with the product and/or electric lines under power.
  • Product installation and/or mounting should be completed by a certified professional as per the local safety and building code guidelines.
  • Cables (including power and charging cables) should be placed and routed to avoid creating electric, tripping or safety hazards.
*Product appearance and specifications are subject to change without notice.

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