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4 Port USB to RS485 High Speed Adapter w/12V DC Power Supply
Model No.
CG-UHS4P485
USB to RS485 Adapter with Failed Signal Check
The USB to RS485 adapter installs automatically once connected to a USB port. When a serial device is connected to it, it will check for a fail signal indicated by a RED LED. With many application uses, this USB to RS485 serial adapter is mountable and includes an attached USB cable. This USB to RS485 adapter provides instant connectivity to communication devices for factory automation equipment, multi-drop data collection devices, barcode readers, time clocks, scales, and more in harsh, rugged environments
- LEDs indicate operation mode, port status, activity and error for easy port monitoring and diagnosis
- Serial port protected with surge protection of 15kV
- Includes 12VDC power adapter with locking screw terminal power jack for reliable connection
- Each RS-485 port with 2kb receive buffer and 2kb transmit buffer
Product Documents
Quick Links:
Description
Industrial Grade USB to RS485 Adapter
Adding a USB 4 port serial adapter is easy with plug and play technology. The CG-UHS4P485 serial adapter is automatically detected and installed to your system. It’s designed for the use in environments requiring 2-wire half duplex RS-485 modes. It can operated in two modes, without echo selectable by DIP switch.
The USB to RS485 adapter features a failure warning displayed by an LED. If an incorrect signal is sent by a defective device, a red LED will illuminate indicating a fail. This USB to RS485 adapter provides instant connectivity to communication devices for factory automation equipment, multi-drop data collection devices, barcode readers, time clocks, scales, and more in harsh environments
USB to RS485 Adapter Features
- Adds four high speed half-duplex RS-485 serial ports via USB connection.
- USB2.0 interface supports high speed 480Mbps.
- Works with USB1.1, USB2.0 and USB3.0 host or USB hubs.
- Supports two operation modes: RS-485 half-duplex echo and non-echo mode.
- Installs as standard Windows COM port.
- COM port number can be changed to any available COM port number.
- Auto transmit buffer control for 2-wire RS-485 half-duplex operation.
- Built-in 15kV ESD protection for each RS-485 port.
- 600W surge protection on all RS-485 bus.
- Provides failure warning when reverse connection or incorrect signals detected.
- Protected circuits automatically shut down the breakdown RS-485 port.
- Each RS-485 port with 2kb receive buffer and 2kb transmit buffer.
- Requires no IRQ, DMA, I/O port.
- RS-485 termination installed on-board, enabled or disabled by jumper.
- Four dual color monitor LEDs indicating operation modes, port status, activity and error.
- External 4-pin DIP switch for easy setting of RS-485 echo/non-echo operation modes.
- Includes 12V DC power adapter with locking screw terminal power jack for reliable connection.
- Supports two power output of +5VDC, 100mA, through pin 1 (VCC) of terminal block, for external devices requiring power.
- Compact palm-size box with DIN rail brackets, optional DIN rail mounting kit for mounting.
- Two mounting holes on the bottom of metal case for optional DIN rail mounting.
- USB cable of 90cm (3ft) included and locked to the metal case for added security.
- Virtual COM port drivers provided for Windows 10, 8.1, 8, 7, 2008, 2003, Vista, XP, 2000, Linux, Mac OS X.
- CE, FCC approval.
- Item Dimensions: 63mm × 85mm × 23mm (W × L × H), 87mm × 85mm × 23mm (W × L × H) with DIN rail brackets
- Item Weight:
Package Contents
- USB to 4 Port RS485 Serial Adapter
- 12V DC power adapter
- Driver Disc
*Surface Mounting screws not included.
Specifications
Product Specifications
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Support
Product Documentation & Drivers
Product Documents
Product Documents
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
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- 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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