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1-Port USB to Serial Adapter (RS-232/422/485) , DIN-rail
Model No.
USB-COMi-PRO
- Adds one RS-232, or RS-422, or RS-485 serial port via USB connection.
- Software configuration for easy RS-232, RS-422, RS-485 mode settings.
- Remote Serial Port Sharing: allows remote access to USB serial port regardless of its physical location.
- Software configuration of serial port type, operation modes, termination resistors and biasing.
- 512 byte transmit buffer and 512 byte receive buffer using buffer smoothing technology for high data throughput.
- ESD surge protection of 15 KV.
- Monitor LEDs of Power, TxD, RxD indicating power & port status.
Product Documents
Product Documents
Drivers
Quick Links:
Description
The USB-COMi PRO is an innovative Industrial USB to single port serial adapter designed completely jumperless and free of any DIP switch for easy configuration. A user-friendly configuration program of Windows and Linux is provided to allow users to select and set easily the COM port to any RS-232, RS-422 or RS-485 mode with various operation mode options. Just connecting your computer to the Internet, plugging the adapter to the USB port on the PC, then you let Windows install the driver automatically. You do not need to install the driver manually. There are no IRQ or COM port conflicts, since the serial port does not require any additional IRQ, DMA, memory as resources on the system.
Pressing the button near the DE9 male connector to activate the configuration mode, users can set the port to RS-232, RS-422, or RS-485 from the graphic interface on the screen. Besides the classical RS-232 and RS-422 port, the adapter offers three variants of RS-485 modes for user’s selection to meet different application needs. Built-in termination and biasing option are available for data transmission lines. Free from opening the metal chassis, users can conveniently configure the operation mode of RS-232, RS-422 or RS-485 serial port, enable or disable Tx, Rx termination resistors and biasing resistors by the provided configuration utility.
USB-COMi PRO provides a unique feature of Remote Serial Port Sharing that allows to share the serial port and device to other users in the network. It breaks the distance limitation of traditional serial ports and USB. When the app is activated, you can network-enable the adapter and make the serial port available to other users in the network. You can share the serial port and the connected serial device to multiple client computers in the network. USB-COMi PRO adapter makes it easy to network- enable serial devices, and allows remote RS-232, or RS-422, or RS-485 serial devices to be shared, accessed, monitored and used over the network, as if the distant serial devices were locally and physically connected to the standard COM port on the host computer.
The USB-COMi PRO Industrial 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 PRO Adapter provides industrial solution requiring single node or multi-drop communications over short and long distance in the network. Complete FTDI drivers support Windows 10, 8, 7, Vista 32-bit, Vista 64-bit, XP and Windows Servers 2016, 2012, 2008, 2003; Linux 3.2 and greater built-in driver support; Mac-OSX drivers available.
Features:
- Adds one RS-232, RS-422, or RS-485 serial port via USB connection.
- Software configuration for easy RS-232, RS-422, RS-485 mode settings.
- Remote Serial Port Sharing: allows remote access to USB serial port regardless of its
physical location. - Software configuration of serial port type, operation modes, termination resistors and
Biasing. - 512 byte transmit buffer and 512 byte receive buffer using buffer smoothing technology
for high data throughput. - ESD surge protection of 15 KV.
- Monitor LEDs of Power, TxD, RxD indicating power & port status.
OS Support:
- Windows XP, Vista, Windows 7, Windows 8, Windows 10, and Windows 11
- Linux and Mac OS 10.X
Package Contents:
- 1x USB-COMi-PRO 1-Port USB to Serial Adapter
- 1x USB-A to USB-B Cable
- 1x Driver / Installation Guide Disc
*Surface Mounting screws not included.
Specifications
Product Specifications
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Support
Product Documentation & Drivers
Product Documents
Product Documents
Drivers
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!
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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.
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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.
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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.
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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.
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How do I clean and reinstall my FTDI drivers?
View Answer
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- 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
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How can I change my device’s COM port?
View Answer
-
- 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.
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How do I check to ensure the COM port is listed properly in Windows?
View AnswerTo ensure your serial device is installed properly, complete the following:
- Press Windows Key + R to open the Device Manager. Once Run comes up, type “devmgmt.msc” into the text field and press Enter.
- Expand the section labeled, Ports (COM & LPT).
- 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.
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I have everything hooked up, but nothing is functioning correctly.
View AnswerTo 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.
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Serial communication is not functioning correctly, how can I tell if the problem caused by the adapter or my serial software application?
View AnswerOlder 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.
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I am receiving an error when I try to install the drivers in Windows 8 64 bit.
View AnswerDriver 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:
- Press the Windows key + C.
- Click Settings > Change PC Settings.
- In the left pane, click General.
- In the right pane, under Advanced startup, click Restart now.
When your system restarts:
- Click Troubleshoot > Advanced options > Startup Settings > Restart.
- Press 7.
When your computer restarts, Driver Signature Enforcement will be disabled and you can install the drivers.
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