Dual-head KVM extender - Ultra-high-definition 4K60 video, USB2.0 and audio


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The ADDERLink XD642 is a high performance KVMA (Keyboard, Video, Mouse and Audio) extender that is designed to provide reliable and real-time access to critical computers - regardless of the location, whilst maintaining the same user desktop experience.

Developed 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 XD642P-DP-US Diagram
  • Dual-head 4K60 video, USB2.0 and audio
  • 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 single- or dual- 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)
  • An RS232 serial device at speeds up to 115200 baud
  • Mono microphone
  • Stereo speakers
  • Line-level audio in/out connections

ADDERLink XD642 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 XD642 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 XD642 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 XD642 Package Contents

Adder XD642 Package Contents

  • (1) XD64x Local Transmitter (TX)
  • (1) XD64x Remote Receiver (RX)
  • (2) 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 XD642 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 dual heads 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
2 x DisplayPort™ in
1 x USB2.0 Type B for HID
1 x USB2.0 for hi-speed
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