ADDERLink XD641 Single-Head KVM Extender 4K60 video, USB2.0, and audio via CATx or Fiber Cable.


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The ADDERLink XD641 is a high-performance KVMA (Keyboard, Video, Mouse, and Audio) extender that is created to provide reliable and real-time access to crucial computers - regardless of the location while maintaining the same user desktop experience.

Produced for enterprise organizations and high-pressure control rooms, it combines the simplicity of true plug-and-play and high-performance 4K KVM extension, resulting in superior functionality and flexibility in a cost-effective, reliable and straightforward solution.

Adder XD641P-DP-US Diagram
  • Single-head 4K60 video, USB2.0 and audio via single CATx or Fiber cable
  • Point-to-point protocol for ultra-low latency
  • Flexibility between copper and fiber connectivity
  • Adder's USB emulation ensures reliable computer bootup

AdderLink XD extender modules provide support for:

  • High quality digital video
  • Video resolutions up to 4K 4096 x 2160 @60Hz
  • USB keyboard and mouse plus two other USB devices (up to USB 2.0)
  • RS232 can be passed between the units to a maximum baud rate 115K2 with RTS/CTS flow control
  • HD audio quality (stereo audio, 24-bit sampled at 96kHz) for line in/out, microphone and headphone speakers

ADDERLink XD641 Features

  • High-resolution video, real-time control

    The system supports resolutions up to 4096x2160 @ 60Hz using 8 bits per color and 4:4:4 chroma sampling.

  • Single cable

    Video, audio, USB HID (human interface device), hi-speed transparent USB and RS232 signals are transmitted over a single CATx or fiber cable.

  • Up to 4km/2.5 mile extension distances

    The ADDERLink XD641 supports both copper and fiber interfaces. It provides a range of up to 100m over a CAT6 cable link, and up to 4km over an optical fiber link.

  • Emulated USB2.0

    Enables connection of any full and low speed USB HID from mouse and keyboards through to graphics tablets and joysticks.

  • EDID management

    The system has intelligent EDID management to allow the true characteristics of the monitor to be passed back to the computer.

  • Plug and Play

    The ADDERLink XD641 extender is delivered in a zero config. state so it works, without the need for drivers or software, as soon as it is connected.

  • Digital audio

    Video: Encapsulates eight channels of 24-bit, 192kHz sampled "Pulse-code modulation" (PCM) uncompressed audio integrated with video signal. USB: Two channels of 24-bit, 96kHz sampled PCM audio.

  • HD quality analog audio

    HD audio quality (stereo audio, 24-bit sampled at 96kHz) is available for line in/out, microphone and headphone or speakers.

  • Serial communications

    RS232 can be passed between the units to a maximum baud rate 115K2 with RTS/CTS flow control.

ADDERLink XD641 Package Contents

Adder XD642 Package Contents

  • (1) XD64x Local Transmitter (TX)
  • (1) XD64x Remote Receiver (RX)
  • (1) VSCD17: DisplayPort Cable
  • (1) VSC24: USB Cable
  • (1) VSC22: 6.6ft / 2m audio cable (3.5mm jacks)
  • (2) PSU-IEC-12VDC-1.5A: Power adapter + US power cord (for TX and RX)

ADDERLink XD641 Specifications

Height 1.54 in. (39mm)

7.32 in. (186mm)

Depth 5.83 in. (148mm)
Weight TX - 2.84 lb. (1.219 kg) RX- 2.73 lb. (1.24 kg)
Operating Temperature 0°C to 40°C / 32°F to 104°F
Power Input 100-240 VAC, 47/63Hz
Power Output 12 VDC 18W output from power supply unit
Supported Hardware  
Video resolutions The system supports single-head at resolutions to a maximum of 4096x2160 @ 60Hz
Software compatibility All known operating systems. No drivers required
Extension technology 5Gb/s CATx or 10Gb/s fiber with ultra low latency adaptive video stream compression.
Local unit - Transmitter (TX)
4 x Tri-color status LEDs
1 x DisplayPort™ in
2 x USB2.0 Type B
Line in and out analog audio
RJ12 serial port
RJ45 and SFP+ ports
Remote unit - receiver (RX)
4 x Tri-color status LEDs
2 x DisplayPort™ out
4 x USB2.0 full speed Type A
Mic in, headset and speaker out
RJ12 serial port
RJ45 and SFP ports
Extension Distance Fiber (SM) 2.4M (4km)
Fiber (MM) 984ft (300m)
CAT6 328ft (100m)
CAT5e 164ft (50m)
Approved Agency CE, FCC