Zk-u485 Driver

The ZK-U485 driver is integrated into the Linux kernel. In most cases, the converter works with no extra steps.

Integrated TVS overvoltage suppression, ESD protection, and short-circuit prevention. Step-by-Step Installation Guide

What are you using (Windows 10, Windows 11, macOS, Linux)? Do you know if your board uses the CH340 or CP2102 chip? What industrial device are you trying to connect to?

This article is a complete resource for the ZK-U485 driver, explaining why it's needed, where to find it, and how to install and troubleshoot it on Windows, Linux, and macOS. zk-u485 driver

Report generated: April 2026 For exact driver files, refer to the manufacturer (ZKTeco) or chip vendor’s support site.

| 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 |

Uninstall the device, restart the computer, and install the verified manufacturer driver. COM Port Disappears Intermittently Cause: Windows Power Management is turning off the port. The ZK-U485 driver is integrated into the Linux kernel

If you encounter issues with the ZK-U485 driver, try the following:

Windows Update sometimes replaces working drivers with generic ones. Roll back the driver: Device Manager → Right-click COM port → Properties → Driver → Roll Back Driver. If that fails, reinstall the official Prolific driver v3.3.2.105.

If you have used other USB-to-RS485 modules, previous drivers may cause conflicts. Uninstall the previous drivers and reinstall the CH340 driver. Step-by-Step Installation Guide What are you using (Windows

Note: You may need to grant permission to read/write to the port by adding your user account to the dialout group: sudo usermod -a -G dialout $USER (Log out and back in for changes to take effect). 4. Configuring the ZK-U485 Port Settings

When you plug the ZK-U485 into a Windows 10/11 PC for the first time, one of three things happens:

The CH340 driver is built into the kernel ( ch341.ko ). Plug it in and run dmesg | grep tty . You will see /dev/ttyUSB0 or /dev/ttyACM0 . Use screen /dev/ttyUSB0 9600 .