Product ID: ICUSB2321284
The ICUSB2321284 1S1P USB to Serial/Parallel Adapter Cable enables you to connect DB9 RS232 serial devices and IEEE 1284 parallel devices to your PC or Linux laptop or desktop computer, through a single USB port, as though the computer offered onboard connectors.
An innovative solution, the adapter cable features both a parallel and serial port that can be used simultaneously, delivering serial and parallel data rates of up to 921.6 Kbps and 1Mbps (respectively) to ensure optimum performance from your connected devices.
Simple to install and use, the serial/parallel USB adapter is a cost-effective solution that bridges the connectivity gap between modern computers and legacy serial peripherals.
Backed by a StarTech.com 3-year warranty and free lifetime technical support.
Warranty Information | Warranty | 3 Years |
---|---|---|
Connector(s) | 1 - Connector Type(s) | DB-25 (25 pin, D-Sub) |
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 | 2 |
Interface | Serial | |
Bus Type | USB 2.0 | |
Port Style | Cable Adapters | |
Industry Standards | RS232, IEEE 1284, USB 1.1 | |
Chipset ID | ASIX - MCS7715 | |
Packaging Information | Package Height | 1,3 in [32 mm] |
Package Length | 5,6 in [14,3 cm] | |
Shipping (Package) Weight | 4,0 oz [114 g] | |
Package Width | 6,9 in [17,5 cm] | |
Performance | Serial Protocol | RS-232 |
Max Baud Rate | 921.6 Kbps | |
Data Bits | 5, 6, 7, 8 | |
FIFO | 192 Bytes | |
Parity | Even, Odd, Mark, Space, None | |
Physical Characteristics | Weight of Product | 2,4 oz [69 g] |
Color | Black | |
Material | Plastic | |
Cable Length | 36,0 in [91,5 cm] | |
Product Length | 39,4 in [100 cm] | |
Software | OS Compatibility | Windows® CE 5.0, XP, Vista, 7, 8, 8.1, 10 Windows Server® 2003, 2008 R2, 2012, 2016, 2019 Linux 3.5.x to 4.11.x LTS Versions only |
What's in the Box | 1 - Included in Package | USB to Serial & Parallel cable |
User Manual |
Extend your EGA monitor cable or mouse cable by 6ft
Reliably extend the distance of a USB 2.0 device an additional 15ft
Extend an RS232 serial connection up to 1000 meters (3300 feet) using Cat 5 cabling
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Live Chat (opens in new window)Some driver installation packages may require you to disable driver signature enforcement in Windows 8, which will allow unsigned driver packages to be installed on your system.
Note: Before you continue, save any open documents and close all open programs.
To disable driver signature enforcement, complete the following:
When your system finishes restarting, complete the following:
When your computer restarts, driver signature enforcement will be disabled and you can install your drivers.
Note: When you restart your computer after you install your drivers, driver signature enforcement will be enabled again. This does not prevent your newly installed drivers from working, but does prevent any other unsigned drivers from being installed until driver signature enforcement is disabled.
Some driver installation packages may require you to disable driver signature enforcement in Windows 8.1, which will allow unsigned driver packages to be installed on your system.
Note: Before you continue, save any open documents and close all open programs.
To disable driver signature enforcement, complete the following:
When your system finishes restarting, complete the following:
When your computer restarts, driver signature enforcement will be disabled and you can install your drivers.
Note: When you restart your computer after you install your drivers, driver signature enforcement will be enabled again. This does not prevent your newly installed drivers from working, but does prevent any other unsigned drivers from being installed until driver signature enforcement is disabled.
You may need to disable Driver Signature Enforcement in Windows 10 to use some driver installation packages. When you disable this feature, you can install unsigned driver packages on your computer.
Note: Before you continue, save any open documents and close all of your programs. You will need to restart your computer to disable Driver Signature Enforcement.
To disable Driver Signature Enforcement, complete the following:
After your computer finishes restarting, complete the following:
When your computer finishes restarting, Driver Signature Enforcement will be disabled and you can install the drivers.
Note: When you restart your computer after you install your drivers, driver signature enforcement will be enabled again. This does not prevent your newly installed drivers from working, but does prevent any other unsigned drivers from being installed until driver signature enforcement is disabled.
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:
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).
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.
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:
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).
Before you install the device, make sure that your operating system is current (for example, the most recent service pack is installed).
Note: Windows usually saves the files to the Downloads folder that is associated with your user account (for example, C:\Users\your_name\Downloads).
Note: The Select your device’s type from the list below screen does not appear on all systems. If you do not see this screen, skip this step.
Note: To view your system type, press Windows key + R, type control /name microsoft.system, and press Enter.
Before you install the device, make sure that your operating system is current (for example, the most recent service pack is installed).
Note: Windows usually saves the files to the Downloads folder that is associated with your user account (for example, C:\Documents and Settings\your_name\My Documents\Downloads).
Note: The Hardware Type screen does not appear on all systems. If you do not see this screen, skip this step.
Note: To view your system type, press Windows key + R, type control /name microsoft.system, and press Enter.
To check whether or not an RS-232 serial port is working, perform an RS-232 loopback test by doing the following:
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.
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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If the USB device does not work after your computer has been in extended hibernation, it is likely that Windows has automatically turned off the USB Root hub to save power.
The steps below outline how to configure the USB root hub to stay on during hibernation, to prevent this from happening.
Windows 10 / 8
Note: You may need to disconnect and re-connect your USB device after applying these settings to re-establish the connection.
Windows 7 / Vista
Note: You may need to disconnect and re-connect your USB device after applying these settings to re-establish the connection.
Windows XP
Note: You may need to disconnect and re-connect your USB device after applying these settings to re-establish the connection.
When you troubleshoot issues with a serial or parallel hybrid 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 or parallel cables
Serial or parallel ports
Serial or parallel devices
To test your setup components, try the following:
Use the serial or parallel cable, serial or parallel port, and serial or parallel device in another setup to see if the problem is with the components or the setup.
Use a different serial or parallel cable, serial or parallel port, and serial or parallel 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 or parallel ports and serial or parallel 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 or LPT port number is the correct number for the serial or parallel device and that the software being used to connect the computer to the serial or parallel device uses the correct COM or LPT port number.
If you do not see the COM or LPT port number in Device Manager see this FAQ for PCI/PCIe expansion cards: https://www.startech.com/support/faqs/technical-support?topic=expansion-cards#pci-pcie-cannot-boot-os-or-detect-windows
or this FAQ for USB devices: https://www.startech.com/support/faqs/technical-support?topic=expansion-cards#usb-cannot-detect-windows
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 or LPT port number is between a certain range. For example, COM1 to COM4 for serial and LPT1 and LPT2 for parallel.
Perform a serial loopback test. See this FAQ on how to perform a RS-232 serial loopback test: http://www.startech.com/faq/serial_loopback_test_rs232_windows
Note: There is not an equivalent loopback test that can be performed for parallel devices.
To confirm that Windows detects your USB device, complete the following:
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.
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