Kramer SX42HU-3 HighSecLabs Secure 2x4 4K30 UHD HDMI Mini-Matrix KVM Switch with fUSB

The SX42HU-3 from Kramer’s HighSecLabs line is a purpose-built, secure HDMI mini‑matrix KVM switch designed for environments where multiple security classifications must coexist without compromising data integrity. This compact device enables viewing and controlling up to four computers with separate security domains while securely sharing essential peripherals—keyboard, video, mouse, audio, and USB devices—across workstations, labs, data centers, and classified facilities. Built to withstand the demands of secure operations, the SX42HU-3 combines robust hardware isolation with convenient, enterprise-friendly features that simplify management, reduce clutter, and boost productivity for critical tasks.

• Secure multi-host control: Manage up to four security-cleared hosts from a single console, with hardware-enforced isolation that prevents cross-domain data leakage and preserves trusted workflows.
• 4K30 UHD video capability: Experience crisp, high‑definition visuals across compatible displays, enabling precise monitoring, analysis, and decision-making at resolutions up to 3840x2160 at 30 Hz.
• fUSB peripheral sharing: Seamlessly attach USB keyboards, mice, flash drives, and other USB devices to the matrix, with controlled access to each connected computer to support secure peripheral usage.
• Compact, rugged design for secure environments: A durable enclosure optimized for secure rooms and compliance-minded deployments, suitable for desk, rack, or wall-mount configurations to fit restricted spaces.
• Intuitive operation and fast switching: Quick, reliable matrix switching with user-friendly controls and hotkey support, delivering near‑instant transitions between hosts to maintain workflow continuity.

Technical Details of Kramer SX42HU-3

• Product family: HighSecLabs Secure 2x4 HDMI Mini-Matrix KVM Switch
• Model: SX42HU-3
• Configuration: 2x4 HDMI matrix with secure KVM functionality (supports four hosts/console endpoints in a multi-domain setup)
• Video output: 4K UHD (3840x2160) at 30 Hz per display channel
• Video input: HDMI inputs compatible with standard 4K sources
• USB/Peripheral sharing: fUSB support for shared keyboards, mice, USB storage and other USB devices across hosts
• Security features: Hardware-assisted isolation between security domains, designed for environments requiring strict data separation and controlled pathways
• Audio: Embedded audio passthrough for compatible HDMI/audio devices
• Power: External power supply required for operation
• Enclosure: Compact, durable chassis suitable for secure desk or rack installation

How to install Kramer SX42HU-3

• Plan your layout: Place the SX42HU-3 on a stable surface in a secure environment. Ensure cable routes minimize exposure to unauthorized access and maintain clean separation between security zones.
• Connect video sources: Attach your HDMI cables from each computer (host) to the HDMI input ports on the SX42HU-3. Verify the cabling is secure and runs to the correct sources for each console path.
• Connect displays/console outputs: Run HDMI cables from the matrix outputs to the respective monitors or display walls used by the consoles. Confirm each display is powered and configured for the correct input.
• Attach USB peripherals: Connect USB devices (keyboard, mouse, flash drives, etc.) to the fUSB ports on the matrix. Plan access so that each USB device is securely routed to the intended host without cross‑domain leakage.
• Power and test: Plug in the external power supply and power on the unit. Use the console controls or hotkeys to switch between hosts, verify video integrity, sound (where applicable), and USB device accessibility for each host, and confirm no data leakage across domains.
• Security configuration: If your environment requires, configure any security features or policies provided by HighSecLabs firmware to enforce isolation and access controls across the four hosts.

Frequently asked questions

• What is the Kramer SX42HU-3? A secure 2×4 HDMI mini-matrix KVM switch designed to simultaneously view and control up to four computers with different security classifications, while securely sharing peripherals such as keyboard, mouse, audio, USB devices, and HDMI video.
• What resolutions does it support? It supports UHD video up to 4K at 30 Hz on compatible displays, ensuring sharp details for monitoring, analysis, and collaboration in secure environments.
• Is hardware isolation available? Yes. The SX42HU-3 provides hardware‑assisted isolation between security domains to prevent data leakage and to maintain trusted workflows across multiple hosts.
• Do I need software to operate it? No. The device is designed for software-free operation, with intuitive hardware controls and hotkeys for fast switching and peripheral management.
• What’s included and how do I get started? The package typically includes the SX42HU-3 unit, a power supply, and instruction manual. For deployment, connect your hosts, monitors, and USB peripherals as described in the installation steps and configure security policies as required by your environment.