S25HH0 303DH US

S25HH0 303DH US Triple Monitor KVM Switch User Manual

Model: 303DH US

1. Introduction

The S25HH0 303DH US KVM Switch allows you to control up to three computers using a single set of keyboard, mouse, and three monitors. This device supports high-resolution video output and USB 3.0 peripheral sharing, enhancing productivity in multi-computer environments.

Please read this manual thoroughly before installation and operation to ensure proper use and to maximize the performance of your KVM switch.

2. Safety Information

  • Ensure the KVM switch is placed on a stable, flat surface.
  • Do not expose the device to water, moisture, or extreme temperatures.
  • Use only the provided power adapter. Using an incorrect adapter may damage the device and void the warranty.
  • Avoid blocking ventilation openings to prevent overheating.
  • Do not attempt to open or repair the device yourself. Refer all servicing to qualified personnel.
  • Disconnect power before cleaning. Clean the device with a soft, dry cloth.

3. Package Contents

Please check the package contents upon receipt. If any items are missing or damaged, contact your vendor.

  • S25HH0 303DH US Triple Monitor KVM Switch
  • Power Adapter
  • Wired Remote Switch
  • USB 3.0 Cables (Quantity may vary based on package)
  • HDMI Cables (Quantity may vary based on package)
  • User Manual (This document)

4. Product Overview

The KVM switch features multiple ports for connecting your computers, monitors, and USB peripherals. Familiarize yourself with the port layout before proceeding with installation.

Front and rear view of the S25HH0 303DH US KVM Switch showing all ports and buttons.

Image: Front and rear view of the S25HH0 303DH US KVM Switch. This image illustrates the various input and output ports, including HDMI, USB 3.0, and the power input, along with the physical switch buttons for PC selection.

Front Panel

  • PC Selection Buttons: Used to manually switch between connected computers.
  • USB 3.0 Ports: For connecting keyboard, mouse, and other USB 3.0 peripherals.
  • LED Indicators: Show which computer is currently selected.

Rear Panel

  • HDMI Input Ports (PC1, PC2, PC3): Connect to the HDMI output of your computers.
  • USB 3.0 Input Ports (PC1, PC2, PC3): Connect to the USB 3.0 ports of your computers.
  • HDMI Output Ports (Monitor 1, Monitor 2, Monitor 3): Connect to your monitors.
  • DC 12V Power Input: Connect the provided power adapter.
  • Remote Switch Port: Connect the wired remote control for switching.

5. Setup Instructions

Follow these steps to connect your KVM switch:

  1. Power Off Devices: Ensure all computers and monitors are powered off before making any connections.
  2. Connect Monitors: Connect your three monitors to the HDMI Output ports (Monitor 1, Monitor 2, Monitor 3) on the KVM switch using HDMI cables.
  3. Connect Computers (PC1):
    • Connect the HDMI output from your first computer to the HDMI Input (PC1) on the KVM switch.
    • Connect a USB 3.0 cable from your first computer's USB 3.0 port to the USB 3.0 Input (PC1) on the KVM switch.
  4. Connect Computers (PC2 & PC3): Repeat step 3 for your second and third computers, connecting them to the respective HDMI Input (PC2/PC3) and USB 3.0 Input (PC2/PC3) ports.
  5. Connect Peripherals: Connect your keyboard, mouse, and any other USB 3.0 peripherals to the USB 3.0 ports on the front panel of the KVM switch.
  6. Connect Wired Remote (Optional): If desired, connect the wired remote switch to the dedicated port on the KVM switch.
  7. Power On: Connect the provided 12V power adapter to the DC 12V input on the KVM switch, then plug it into a power outlet.
  8. Power On Devices: Power on your monitors, then power on your computers.
Diagram showing two computers connected to the KVM switch, sharing four USB 3.0 devices and multiple monitors.

Image: Connection diagram illustrating how two PCs share four USB 3.0 devices and multiple monitors through the KVM switch. This highlights the USB 3.0 ports for peripherals like keyboards, mice, and printers.

6. Operating Instructions

6.1 Switching Between Computers

You can switch between connected computers using two methods:

  • Physical Button Switch: Press the corresponding PC selection button (PC1, PC2, or PC3) on the front panel of the KVM switch. The LED indicator will light up for the selected computer.
  • Wired Remote Switch: Use the wired remote control to switch between computers. Press the button on the remote to cycle through the connected PCs.
Image showing the physical button switch on the KVM device and the wired remote switch.

Image: Two switching methods for the KVM switch: the physical buttons on the device and the external wired remote control. This illustrates the flexibility in controlling which computer is active.

6.2 Display Modes (Extend Mode / Copy Mode)

After connecting correctly, you can choose your desired display mode:

  • Press "Windows + P" on your keyboard.
  • A pop-up window will appear, allowing you to select between display modes such as Extend or Duplicate (Copy).
Illustration of Extend Mode showing different content on three monitors and Copy Mode showing identical content on three monitors.

Image: Comparison of Extend Mode and Copy Mode. In Extend Mode, each monitor displays unique content, expanding the desktop. In Copy Mode, all three monitors display the same content, duplicating the desktop.

6.3 USB 3.0 Device Sharing

The KVM switch allows up to four USB 3.0 devices to be shared between the connected computers. When you switch to a different computer, the connected USB peripherals (keyboard, mouse, USB drives, etc.) will automatically switch to that computer.

USB 3.0 offers a faster transfer rate of 5Gbps compared to USB 2.0's 480Mbps, ensuring efficient data transfer for your peripherals.

7. Display Resolution and Refresh Rate

The KVM switch supports high-resolution video outputs, ensuring a clear and smooth visual experience.

  • DisplayPort (DP1.4) Support: Up to 8K@30Hz, 4K@144Hz, 4K@120Hz. Backward compatible with lower resolutions and refresh rates.
  • HDMI (HDMI2.1) Support: Up to 8K@60Hz, 4K@120Hz. Backward compatible with lower resolutions and refresh rates.
Image highlighting Ultra HD 8K@60Hz resolution support and detailing DisplayPort and HDMI specifications.

Image: Visual representation of Ultra HD 8K@60Hz capability. This image details the supported resolutions and refresh rates for both DisplayPort 1.4 and HDMI 2.1 connections, emphasizing high-quality video output.

8. Maintenance

  • Keep the KVM switch in a cool, dry place away from direct sunlight.
  • Regularly clean the exterior of the device with a soft, dry, lint-free cloth.
  • Do not use liquid or aerosol cleaners, as they may contain flammable substances or chemicals that can damage the device.
  • Ensure all cables are securely connected and free from kinks or damage.

9. Troubleshooting

If you encounter issues with your KVM switch, please refer to the following common problems and solutions:

Problem Possible Cause / Solution
No display on monitors.
  • Ensure the KVM switch is powered on and the power adapter is securely connected.
  • Verify all HDMI cables are correctly connected between computers, KVM, and monitors.
  • Check if the correct input source is selected on your monitors.
  • Try restarting the computers and KVM switch.
Keyboard or mouse not working.
  • Ensure the USB 3.0 cables are securely connected from computers to the KVM switch.
  • Verify the keyboard and mouse are connected to the correct USB 3.0 ports on the KVM switch.
  • Try connecting the keyboard/mouse directly to the computer to confirm they are functional.
  • Some specialized keyboards/mice may require direct connection or specific drivers.
Cannot switch between computers.
  • Ensure all computers are powered on and properly connected to the KVM switch.
  • Check if the physical buttons or wired remote are functioning correctly.
  • Verify the USB 3.0 cables from the computers to the KVM are connected, as USB connection is required for switching.
Poor video quality or flickering.
  • Ensure you are using high-quality HDMI cables, especially for high resolutions (8K/4K).
  • Check the display settings on your computer to ensure the resolution and refresh rate are supported by both your monitors and the KVM switch.
  • Try reducing the resolution or refresh rate to see if the issue persists.

10. Specifications

Feature Specification
Brand S25HH0
Model 303DH US
Input Ports 3 x HDMI, 3 x USB 3.0
Output Ports 3 x HDMI, 4 x USB 3.0
Video Standard HDMI 2.1, DisplayPort 1.4 (backward compatible)
Max Resolution (HDMI) 8K@60Hz, 4K@120Hz
Max Resolution (DisplayPort) 8K@30Hz, 4K@144Hz, 4K@120Hz
USB Standard USB 3.0 (5Gbps)
Control Method Physical Button, Wired Remote
Operating Voltage 12 Volts
Item Weight 50 Grams
Certifications CE, RoHS

11. Warranty and Support

This product comes with a standard manufacturer's warranty. Please refer to the warranty card included in your package or contact your retailer for specific warranty terms and conditions.

For technical support or further assistance, please contact your vendor or the manufacturer's customer service. Contact information can typically be found on the product packaging or the manufacturer's official website.

© 2023 S25HH0. All rights reserved.

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