1. Introduction
The ATEN CS22U is a 2-port USB KVM switch designed to manage two USB-enabled computers from a single console. This device is suitable for both home and office environments, providing a streamlined solution for controlling multiple systems with one set of keyboard, mouse, and monitor. It supports a maximum video resolution of 2048x1536 and features a remote port selector for convenient switching between connected computers. The CS22U integrates two USB KVM cables directly into the main unit, simplifying installation. No additional software is required for operation.
2. Package Contents
Verify that all components are present and in good condition. If any items are missing or damaged, contact your dealer.
- 1x ATEN CS22U 2-Port USB Cable KVM Switch (with 2 attached KVM cables)
- 1x Remote Switch Module
- 1x User Guide

3. Features
- One USB console controls two USB computers.
- Supports multifunction mice.
- Multiplatform support for Windows, Mac, Linux, and Sun operating systems.
- Superior video quality, supporting resolutions up to 2048 x 1536; DDC2B.
- Compact design with integrated cables for easy setup.
- Remote port selector for convenient switching.
- No software installation required.
4. Setup
Follow these steps to connect your ATEN CS22U KVM switch:
- Power Off Computers: Ensure both computers you intend to connect are powered off.
- Connect Console Devices:
- Plug your USB keyboard into one of the USB Type-A ports on the CS22U unit.
- Plug your USB mouse into the other USB Type-A port on the CS22U unit.
- Connect your VGA monitor cable to the VGA port on the CS22U unit.
- Connect KVM Cables to Computers:
- Take the integrated KVM cables from the CS22U. Each set consists of a VGA cable and a USB cable.
- Connect the VGA cable from the first KVM cable set to the VGA port on Computer 1.
- Connect the USB cable from the first KVM cable set to an available USB port on Computer 1. This USB connection also provides power to the KVM switch.
- Repeat the process for Computer 2, connecting the second KVM cable set (VGA and USB) to its respective ports.
- Connect Remote Port Selector: Plug the remote switch module into the dedicated port on the CS22U unit. Position the remote button in a convenient location on your desk.
- Power On Computers: Power on your computers. The KVM switch will automatically detect the active computer.

5. Operating the KVM Switch
The ATEN CS22U KVM switch is operated using the remote port selector button.
- Switching Computers: To switch between the two connected computers, simply press the button on the remote port selector. Each press will toggle the KVM control to the next available computer.
- LED Indicators: The KVM unit features LED indicators that show which computer port is currently active.

6. Maintenance
To ensure optimal performance and longevity of your ATEN CS22U KVM switch, follow these maintenance guidelines:
- Cleaning: Use a soft, dry cloth to clean the exterior of the KVM switch. Avoid using liquid or aerosol cleaners, as they may damage the unit.
- Environment: Operate the KVM switch in a clean, dry environment, away from direct sunlight, excessive heat, and moisture.
- Cable Management: Ensure cables are not excessively bent or kinked to prevent damage.
- Power Source: The KVM switch draws power from the connected USB ports. Ensure your computers' USB ports provide sufficient power.
7. Troubleshooting
If you encounter issues with your ATEN CS22U KVM switch, refer to the following common troubleshooting steps:
- No Display/Video Issues:
- Verify all VGA cables are securely connected to both the KVM switch and the computers/monitor.
- Ensure the monitor is powered on and set to the correct input source.
- Try restarting the connected computers.
- Check the video resolution settings on your computers. The CS22U supports up to 2048x1536.
- Keyboard/Mouse Not Responding:
- Ensure all USB cables are firmly connected between the KVM switch and the computers, and between the keyboard/mouse and the KVM switch.
- Confirm that the active computer's LED indicator on the KVM switch is lit.
- Try connecting the keyboard and mouse directly to the computer to verify they are functional.
- Some wireless keyboard/mouse combinations may require direct connection or a powered USB hub if they draw too much power or have specific emulation requirements not met by the KVM. The CS22U does not use emulation.
- KVM Not Switching:
- Ensure the remote port selector cable is securely plugged into the KVM unit.
- Press the remote button firmly.
- Verify that both connected computers are powered on and functioning correctly.
- No Power to KVM:
- The CS22U is bus-powered via the USB connections to the computers. Ensure at least one computer is powered on and its USB cable is connected to the KVM.
- Try connecting the USB cable to a different USB port on the computer.
8. Specifications
| Feature | Detail |
|---|---|
| Model Number | CS22U |
| Ports | 2 (for computers) |
| Console Ports | 1x VGA, 2x USB Type-A (for keyboard/mouse) |
| Computer Connectors | 2x Integrated KVM cables (VGA, USB 2.0) |
| Video Resolution | Up to 2048 x 1536; DDC2B |
| Operating Voltage | 5 Volts (USB bus-powered) |
| Current Rating | 1 Amps |
| Dimensions (L x W x H) | 3.24 x 2.76 x 0.97 inches (approximate, main unit) |
| Weight | 10.58 ounces (approximate) |
| Material | Plastic |
| Supported OS | Windows, Mac, Linux, Sun |
9. Warranty Information
ATEN products are designed for reliability and performance. For specific warranty terms and conditions applicable to your region and product, please refer to the official ATEN website or the warranty card included with your purchase. Keep your proof of purchase for warranty claims.
10. Technical Support
For further assistance, technical support, or product information, please visit the official ATEN website or contact their customer service.
ATEN Official Website: www.aten.com
You can also find more information and support resources on the ATEN Store on Amazon.





