SEL CP210x USB to UART Bridge (COM4) Driver

The SEL CP210x USB to UART Bridge (COM4) driver enables Windows to recognize the USB-to-serial interface used with compatible Schweitzer Engineering Laboratories equipment. It provides a virtual COM port so supported applications can exchange serial data with connected hardware, making it useful for technicians and engineers who need to configure, monitor, or troubleshoot SEL devices.

Key Features

• USB-to-UART communication: Allows compatible software to communicate with connected SEL equipment through a USB interface using a virtual serial port.
• COM port recognition: Makes the interface available in Windows Device Manager under Ports (COM & LPT). COM4 is the assigned port in this device name; another computer or USB connection may receive a different number.
• Legacy Windows support: Intended for Windows 10, 8.1, 7, Vista, and XP, provided you select a driver package compatible with your operating system and architecture.
• Serial application access: Lets applications select the assigned COM port and use the communication settings required by the connected equipment.

How to Install SEL CP210x USB to UART Bridge (COM4) Driver

1. Check your Windows version. Confirm your operating system and whether it uses a 32-bit or 64-bit architecture. For Windows 10/11 systems, verify the package’s compatibility notes: Windows 10 is listed as supported here, but Windows 11 support is not confirmed.
2. Choose a compatible package. Before starting your SEL CP210x USB to UART Bridge (COM4) driver download for Windows, check the supported hardware and operating systems. Select the latest version that explicitly supports your setup, rather than assuming the newest release supports older Windows editions.
3. Download and extract the files. Use a trusted vendor source when available. If choosing a free download, confirm the publisher and avoid installers that bundle unrelated software.
4. Install the driver. Follow the package instructions and run its setup program if supplied. For a manual installation, open Device Manager, locate the interface, choose Update driver, and browse to the extracted driver folder.
5. Verify the connection. Connect the equipment as directed, check that the interface appears without a warning icon, and select its assigned COM port in your application. Use the serial settings specified in the equipment documentation.

Keep the driver updated when a compatible update addresses connection issues or operating-system changes. Before replacing a working driver, review the release notes and confirm support for your SEL hardware and Windows version.