Features:
USB Type-C PD Chargers
USB Type-A Chargers
Multi-Port USB Chargers
Integration-Ready Charging PCBAs
2-Port Industrial USB 2.0 to RS-422 / 485 Optical Isolated Adapter
Model No.
USBG-2COMi-SI-M
RS-422 | RS-485 | 384 Bytes Receive | 128 Bytes Transmit
- Superior Build Quality: Housed in a rugged steel chassis with optional mountable flanges, the serial adapter hub is perfect for installations in labs, warehouses, or heavy machinery.
- Safe Industrial Connections: Designed for use with Bar Code Scanners, Time Clocks, Label Printers, Point of Sale Terminals, Receipt Printers, and more the USB to Serial Adapter offers optically isolated 25kV surge protection for connected devices.
- Expand Your Serial Capabilities: Connect 2 legacy 9-pin serial devices through a USB-A port to add legacy functionality to newer technologies with no serial port connections.
- COM Retention: COM Ports are fully configurable, and after reboots, port assignments are preserved.
- USB Power: Power is drawn from a USB connection, no bulky power supply or power outlet is required.
- Upstream: 1 USB port, Type B Female Connector
- Downstream: 2 Male DB9s, w/ nuts / 2 Terminal Blocks
- LEDs: Power, TX / RX
Quick Links:
Description
Introduction:
USB to RS-422 / RS-485 technology is the perfect compliment to serial communication to further the use of existing devices, even when the computer doesn’t offer serial ports. The USBG-2COMi-SI-M USB to RS-422 serial adapter has 128 byte FIFO to allow high-speed communication, even in heavy loaded systems.
This USB to RS-422 serial adapter also allows you to protect your equipment via 2000V optical isolation and 25KV ESD surge protection. Two 6-pin terminal block connectors located on either side for optimal flexibility of serial connection.
This 2-Port serial adapter allows you to add two RS-422 or RS-485 serial ports by connecting to your host USB port. The adapter features a rugged SECC metal chassis, which also includes DIN rail brackets for mounting. Serial COM modes settings, RS-422 or RS-485 are selectable for operation via DIP switches located on the back of the adapter.
Features:
- Two DB9 male connectors & two 6-pin terminal block connectors for optimal flexibility of serial connection
- 2000V DC optical isolation
- 25KV ESD surge protection
- No need to open chassis to set operation modes-two external DIP switches for easy RS-422, RS-485 mode settings
- Installed as standard Windows COM port
- SECC metal chassis with DIN rail bracket
- RS-422 data signals: TxD-, TxD+, RxD+, RxD-, GND, RTS-, RTS+, CTS+, CTS-
- RS-485 4-wire data signals: TxD-, TxD+, RxD+, RxD-
- RS-485 2-wire data signals: Data-, Data+
- Automatic transmit and receive control for 2-wire RS-485 half-duplex mode
- Built-in termination and biasing
- High speed serial port with the baud rate up to 921.6K bps
- Non-standard baudrates supported
- LEDs of Power, TxD and RxD for easy port monitoring and diagnostics
- Serial port protected with surge protection of 25KV
- Powered by USB port, no external power adapter required
- Easy plug and play installation and RS-422/RS-485 device connection
- COM port number assigned can be changed to any COM port number required
- Works with USB 1.1 & 2.0 host port
OS Support:
- Windows 7, Windows 8, Windows 10, Windows 11
- Linux and Mac OS 10.X
Package Contents:
- USB to RS485 2 port serial adapter
- Din Rail plates and screws
- USB A to B cable
- 10x jumpers
*Surface Mounting screws not included.
Specifications
Product Specifications
| Power |
| ||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Compliance |
| ||||||||||||||||||
| Physical Characteristics |
| ||||||||||||||||||
| Serial Attributes |
| ||||||||||||||||||
| Software |
| ||||||||||||||||||
| Environmental |
| ||||||||||||||||||
| Product Information |
| ||||||||||||||||||
| Hardware |
| ||||||||||||||||||
| Performance & Safety |
| ||||||||||||||||||
| Other Data |
|
Pin-Outs
DB9 RS-232 Pin-Outs
Terminal Block RS-232 Pin-Outs
DB9 RS-422 Pin-Outs
Terminal Block RS-422 Pin-Outs
DB9 RS-485 Pin-Outs 2-Wire
DB9 RS-485 Pin-Outs 4-Wire
Terminal Block RS-485 Pin-Outs 2-Wire
Terminal Block RS-485 Pin-Outs 4-Wire
Optional Accessories
Optional Accessories
The 4 port USB 2.0 USB Hub has certain accessories that work with it. These hub accessories are what you can order if needed for this hub.
RS232 Male to Female Serial Data Cable Complete your serial data connection with this 5ft. RS232 DB-9 Male to Female data cable for fast reliable…
Model# 9DBMF5FT
$2.99In stock
Add to cart
Replacement Parts
Replacement Parts
Did you misplace or break a part that came with your hub? Purchase it here!
Support
Product Documentation & Drivers
Product Documentation
FTDI 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!
-
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.
-
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.
-
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.
-
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.
-
How do I clean and reinstall my FTDI drivers?
View Answer
-
- 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
-
-
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.
-
-
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.
-
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.
-
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.
-
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.
Reviews (0)
Be the first to review “2-Port Industrial USB 2.0 to RS-422 / 485 Optical Isolated Adapter”
Related products
Out of stock
Terminal Block Connector - Mini Serial RS232 This DB9 to Terminal is designed to convert the RS422/485 signals in a Micro sized package. The iSerial-TB5 DB9-Female…
Model# iSerial-TB5
$23.29Out of stock
Read more
Out of stock
USB to DB9 RS485 Serial Isolation Isolated industrial USB to Serial port on USB connect RS-422 and RS485 devices, used in industrial environment. With RS-485…
Model# USB-COMi-SI
$104.49Out of stock
Read more
The USBG-232MINI Mini USB RS-232 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.
Model# USBG-232MINI
$27.29In stock
Add to cart
RS485 Serial Adapter for Factory Automation Adapting to new technology, the USB-COMi-TB USB to Industrial Single RS-422/485 Adapter is designed to take industrial serial communication port expansion…
Model# USB-COMi-TB
$73.99In stock
Add to cart
USB to Serial Adapter for RS422 and RS485 Applications The USB-4COMi-SI-M is a USB to Quad RS-422 485 Optical isolated serial adapter and is designed for…
Model# USB-4COMi-SI-M
$409.49In stock
Add to cart
USB to RS232 Adapter - 2500Vrms Isolation Industrial 8-Port DB-9 RS232 to USB Adapter to add eight new or additional serial devices to your system.…
Model# CM-41082
$430.29In stock
Add to cart
FTDI USB to Serial Adapter with Switching Power Supply Industrial Grade Rack Mount 8 Port USB RS-232, RS-422, RS485 Octal Serial Adapter with Metal Case and Built-In…
Model# USB-8COMi-RM
$439.99Not in stock - Backorder allowed
Backorder
RS-232 | 512 Bytes Receive | 512 Bytes Transmit | FTDI Superior Build Quality: Housed in a rugged steel chassis with built in mountable flanges, the…
Model# USBG-COM-M
$46.49In stock
Reviews
There are no reviews yet.