| Specification | Details | | -------------------- | --------------------------------------------------------- | | | CH340G | | Interface | USB 2.0 (Type-A) to RS485 (Terminal Block) | | Communication | Half-duplex, two-way | | Baud Rate | Up to 115200 bps (user-configurable) | | Max. Distance | 1200 meters at 9600 bps | | Voltage | DC 5V (powered via USB) | | Operating Temp. | -40℃ to +80℃ | | Operating Humid. | 0% to 95% RH | | Dimensions | 70 × 27 × 13 mm |
Integrated TVS overvoltage suppression, ESD protection, and short-circuit prevention. Step-by-Step Installation Guide
To test the connection, use a serial terminal program (like PuTTY on Windows or screen on Linux/macOS). Configure it with the following settings to match your target device:
If Windows shows a yellow triangle next to the device, uninstall the driver completely from the Device Manager, restart your PC, and reinstall the CH341SER.exe file again. zk-u485 driver
The CH340 chipset requires installing the WCH CH34x driver for Mac. You may need to enable the driver in System Settings > Security & Privacy .
If you continue to experience issues after trying all the steps above, consider replacing your ZK-U485 unit. Counterfeit Prolific chips are common on the market, and they are notorious for failing driver updates. Invest in an authentic ZKTeco or FTDI-based RS485 converter for trouble-free operation.
Because the converter utilizes the CH340G hardware layout, you must use the standard CH340 / CH341 driver package provided by WCH. For Windows (7, 8, 10, & 11) U-485 USB Installation and User Manual - triplc.com | Specification | Details | | -------------------- |
A green light indicates the unit is powered, while a flashing orange light indicates active communication.
You should see a new entry labeled . The "X" will represent the assigned COM port number (e.g., COM3, COM4).
In conclusion, the ZK-U485 driver is a powerful and versatile solution for enabling communication between devices using the RS485 protocol. With its multi-protocol support, high-speed communication, and long-distance capabilities, it has become a popular choice across various industries. By understanding the features, applications, and benefits of the ZK-U485 driver, as well as following best practices and troubleshooting tips, users can unlock seamless communication and optimize system performance. | 0% to 95% RH | | Dimensions
Modern Windows operating systems often download these drivers automatically via Windows Update. If your device shows a yellow exclamation mark, follow these steps for a manual installation:
After installation, plug in the U485. Windows will automatically assign a COM port (e.g., COM4). Confirm in Device Manager under "Ports (COM & LPT)" → "Prolific USB-to-Serial Comm Port."
Select the installation package matching your operating system architecture (32-bit or 64-bit). 2. Install the Software Extract the downloaded .zip file if compressed.
The installation process may vary slightly depending on your operating system. Here are the steps for Windows, macOS, and Linux:
: For building management systems (BMS), the driver facilitates the integration of RS485-based devices, such as HVAC controllers, lighting systems, and security equipment, with computer-based monitoring and control systems.