Discontinued.4-port HDMI 2.0 KVM switch with 4K Ultra HD resolution and USB 2.0 sharing

replaced by UHDN-4P

What is the UHDN-4Plus?

The UHDN-4Plus is a dedicated multi-platform KVM switch capable of managing four computers on one 4K Ultra-HD HDMI 2.0 screen using USB 2.0 keyboard-mouse. This is one of the first KVM switches on the market to feature 4K (3840×2160 @60Hz) support for workstations.

What is UHDN-4Plus Used For?

The UHDN-4Plus excels at remotely supervising and operating up to four computers from a single PC workstation. With its 4K-support, the UHDN-4Plus is especially useful for visual command applications where minute detail makes all the difference. Corporate IT facilites, data centers, transportation authorities, production studios, and more can benefit from UHDN-4Plus’ exceptional video output and intuitive multi-computer command.

How to use UHDN-4Plus

The UHDN-4Plus is plug-and-play, so it is ready to use as soon as it is hooked up to computers and a power source. From there, the UHDN-4Plus switches control between any four connected computers using keyboard hot-keys, the device’s easy front-panel selector buttons, or even RS-232 commands.


  • Supports Mac, PC, Linux and Sun Mac OS, Sun OS, Unix
  • Supports resolutions up to 4K Ultra HD (3820×2160 @60Hz) and 1080p (1920×1080 @60Hz) Full HD
  • Compatible with HDMI 2.0 for 4K resolution
  • Zero pixel loss with TMDS signal correction
  • Supports all USB 2.0 devices, including keyboard and mouse
  • Control Sun, Mac or PC workstations from one KVM console
  • Compatible with all major software including Windows, Linux, Mac OS, Sun OS, and Unix
  • Rack mountable in a standard 19 inch rack
  • Flash upgradeable firmware
  • Front panel keys for selecting users and channels manually
  • Supports LPCM 7.1, Dolby True HD, Dolby Digital Plus and DTS-HD Master Audio
  • RS-232 control for remote control
  • Optional TCP/IP control
  • Hot-key commands for quick channel selection.
  • Independent (asynchronous) switching of KVM and peripheral USB ports. Users can scan a document and save in another computer
  • Complete keyboard emulation for error free booting


  • (1) UHDN-4PLUS-S 4-Port 4K HDMI 2.0 and USB 2.0 KVM Switch
  • (1) Power Supply (PS5VDC4A)
  • Data Centers & Server Farms
  • Corporate Office Environments
  • Franchise Businesses
  • Air Traffic Control
  • Train and Ground Transporation Management
  • Industrial Control Rooms
  • Audio/Visual Production Studios
  • Research labs
  • Tech Start-Ups
Format HDMI 2.0
Maximum Pixel Clock 300 MHz
Input Interface (4) HDMI (female)
Output Interface (1) HDMI (female)
Resolution up to 4K x 2K (3840 x 2160 @60Hz)
1080P @ 120Hz and 1080P 3D @60Hz
DDC 5 volts p-p (TTL)
Input Equalization Automatic
Input Cable Length Up to 20 ft.
Output Cable Length Up to 20 ft.
Bandwidth Frequency 10.2Gbps
Signal Type USB 2.0, 1.1, and 1.0 w/ internal hub
Input Interface (4) USB Type B
Output Interface (2) USB 1.1 Type A for KVM Devices
(2) USB 2.0 Type A Transparent
Front Pane Tactile Switch, Display: LCD 2 x 20 Character
RS-232 Via Control @ 115200 bps
Hotkeys Via Keyboard
Power External 100-240 VAC/ 5VDC4A @ 20W
Consumtion 3W (Max)
Dimensions 1.71” H x 6.34” D x 12.5” W
Weight 3.5 lbs
Approvals UL, CE, ROHS Compliant
Operating Temp -5 to +35°C(+23 to +95°F)
Storage Temp. -4-185 °F (-20-85 °C)
Humidity 5 to 90%RH (No Condensation)
Emulation Keyboard and Mouse
Part No. Description
UHDN-4Plus-S 4-Port 4K HDMI 2.0 and USB 2.0 KVM Switch. Includes: [HDN-4Plus & (PS5VDC4A)]

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