AdderLink Dual 4K DisplayPort Extender w/ USB, Audio & HDR10 (492ft*)


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Video Input: DisplayPort
Video Output: Dual Monitor (330ft) or Single Monitor (500ft)
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ADDERLink XD522 (XD522-DP-PAIR) is a high performance Dual-monitor DisplayPort KVM (Keyboard, Video, Mouse) extender that enables you to locate your critical computing hardware in a secure and temperature controlled environment away from the user work station whilst maintaining the same user desktop experience.

The XD522 can transmit one 4K @30Hz, or 2560x1600 at HDR10 video stream to a single monitor or two 1920x1200 video streams to two monitors. Also supports DisplayPort audio, digital audio (S/PDIF), analog audio, Hi-Speed USB 2.0 and USB 2.0 (full and low speed) over CATx cable.

ADDERLink XD522-DP-PAIR Application diagram

  • Supports DisplayPort++ 4K UHD resolutions up to 3840 x 2160 (VESA timing)
    • Dual video streams limit resolutions to 1920 x 1200
  • 500 foot (150 meter) extension distance for a single 1920 x 1080 screen
  • 330 foot (100 meter) extension distance for two 1920 x 1200 screens or a single high resolution screen to 2560 x 1600 (with HDR10 support)
  • Supports Mac Cinema and Thunderbolt Display (2560 x 1440)
  • USB 2.0 Hi-Speed for mass storage devices plus keyboard, mouse tablet and touch
  • Plug and play
  • S/PDIF, and analog audio

Adder XD522 Transmitter & Receiver Back View
ADDERLink XD522-DP-PAIR Transmitter & Receiver Rear

See Detailed Layout

Adder XD522 Features

  • Adder XD522 Extend DisplayPort KVM up to 500ft (150m) extension over single CatX cable

    Up to 500ft (150m) extension over single CatX cable

    DisplayPort video, USB 2.0 (HID-only) and audio all pass along a single CatX cable. A second CATx cable is required for the Hi-Speed USB 2.0 extension. Distance is dependent on the monitor resolution, number of monitors, cable type and the number of connection breaks for patch panels and wall plates:

    Cable vs. Distance

  • Adder XD522 Perfect DisplayPort video, with HDR10 support

    Perfect DisplayPort video, with HDR10 support (single or dual-head)

    The XD522 system is uncompressed, where by every pixel of every frame are sent without loss. The receiver supports DisplayPort Dual Mode (DP++) which means that monitors which only support HDMI or DVI can be used (with the correct adapter cable). XD522 can extend either two 1920 x 1200 screens or a single high resolution screen to 2560 x 1600. The single screen configuration supports High-Dynamic-Range (HDR10) up to 2560 x 1600 @60Hz 10bit per color.

  • Adder XD522 High-quality audio via DisplayPort, 3.5mm AUX, or S/PDIF

    HD quality audio via DisplayPort, 3.5mm AUX, or S/PDIF

    The XD522 system delivers analog stereo audio (Line in, Line out) & supports microphone input & headphones. It also delivers S/PDIF (optical input) via a 3.5mm jack line in connector (mini Toslink). The DisplayPort digital audio path can have up to eight channels of 24-bit 192 kHz uncompressed "Pulsecode modulation" PCM audio or can encapsulate compressed audio formats in the audio stream. Supported compressed formats: DRA, Dolby MAT, DTS HD.

  • Adder XD522 transparent USB

    Transparent USB 2.0 (Low, Full, High Speed)

    The transparent USB 2.0 link supports enables connection of any USB human interface device from mice and keyboards through to touch screens, graphics tablets, jog shuttles, joysticks and 3D explorers. Mass storage devices and isochronous devices such as webcams and headsets can also be used.

  • Adder XD522 Intelligent USB hub

    Intelligent USB hub

    The remote unit has an built-in 6-port USB hub to enable several USB devices to be connected. HID devices are supported on ports marked "A" and isochronous devices (i.e. USB audio or video devices) on the Hi-Speed link only marked "B".

  • Adder XD522 Serial RS232 extension

    Serial RS232

    RS232 with RTS/CTS flow control can be passed between the units to a maximum baud rate 115K2 via the options port. Adder's RC4 remote key switch is also supported.

  • Adder XD522 EDID management

    EDID management

    The XD522 extender has an intelligent EDID management to allow the true characteristics of the monitor to be passed back to the computer.

  • Adder XD522 Plug and Play

    Plug and Play

    The AdderLink XD522 extender is delivered in a zero config state so you can plug in the units and start working with them straight away. There is no need for drivers or software to be installed.

  • Adder XD522 Rack, Wall, and VESA Mounting

    Flexible mounting options

    AdderLink XD522 units can be mounted on rack (RMK4S: 1 unit in 1U, or RMK4D-R2: 2 units side-by-side in 1U), desktop, wall mounted (RMKV4) or attached to the back of your monitor using an optional VESA mounting carriage (RMKV4).

  • Adder XD522 - Built to last - 50,000 hours MTBF

    Built to last - 50,000 hours MTBF

    Adder Technology have a well-earned reputation for creating products that perform well and stay the course. AdderLink XD522 is no exception and features tough enclosure with internal components and external connectors that can an easily withstand environmental pressures. Minimum of 50,000 hours Mean-Time-Between-Failure (MTBF) based on 100% PSU load. Actual PSU load does not exceed 66%.

XD522-DP-PAIR-US Package Contents

Adder XD522 Package Contents

  • (1) XD522 Transmitter
  • (1) XD522 Receiver
  • (1) VSCD10 6ft (2m) DisplayPort cable
  • (2) VSC22 6ft (2m) Audio cable with 3.5mm stereo jacks
  • (2) VSC24 6ft (2m) USB Type A to B cable
  • (1) VSC40 6ft (2m) Serial RS232 cable
  • (8) Self-adhesive rubber feet
  • (2) 20W Power adapter with US-specific power lead
  • (1) Quick start guide
  • (1) 2-Year Limited Warranty & Lifetime World Class Support

Adder XD522-DP-PAIR Specifications

Height 1.76 in. (44 mm.)
Width 7.92 in. (198 mm.)
Depth4.8 in. (120 mm.)
Weight1.65 lbs. (0.75 kg.)
Operating Temperature0°C to 40°C / 32°F to 104°F
Connection2.5mm DC jack (power adapter included)
Power Adapter Input100-240VAC 50/60Hz, 0.8A
Power Adapter Output5VDC 20W output
DisplayPort interfaceResolutions to a maximum of 3840 x 2160 on a single screen or 1920 x1200 on two screens. The receiver unit supports DisplayPort Dual Mode (DP++) also.
DPCP and HDCP are not supported.
USB 2.0Supports up to six USB 2.0 devices (low or full speed). The system does not allow non-HID devices on ports marked 'A'. Isochronous devices are supported (i.e. USB audio or video devices) on the Hi-Speed link only marked 'B'.
Digital stereo audioThe system delivers analog stereo audio (Line in, Line out) and supports microphone input and headphones. It also delivers S/PDIF (optical input) via a 3.5mm jack line in connector (mini Toslink).
RS232RS232 can be passed between the units to a maximum baud rate of 115K2 via the options port.
HardwareAll computers with DisplayPort, USB, audio, RS232 - requirement dependent.
O/SAll known software and operating systems including: Windows (all), DOS, Linux, Unix, BSD, Sun OS, Solaris, Mac OS, NetWare etc.
Computer connections Transmitter (TX) 
VideoDisplayPort x 2
Audio3.5mm Audio-in,
3.5mm Audio-out
OtherUSB type B x 2,
RS232 10p10c options port.
Peripheral connections Receiver (RX) 
VideoDisplayPort ++ x 2
Audio3.5mm Audio-in,
3.5mm Audio-out,
Headphone 3.5mm out,
Microphone 3.5mm in
OtherUSB type A x 4,
RS232 10p10c options port
ApprovalsCE, FCC

XD522 is also known as the XD522-DP-PAIR, XD-522-DP-PAIR, XD522-DP-PAIR-US, and XD522-DP-PAIR-USA.

Question: It looks like I can run two different computers through this single box.
Answer: Thank you for your inquiry. The Adder XD522 has two DP connections for dual screen purpose. The 2 x USB for Keyboard/Mouse only supports one machine, therefore if you had two machines, one on each video feed, only one machine would be able to have control, the other being static video. In your case, you would need a 2-port extender, also available with dual monitor capabilities.

Question: Is it possible to connect MAC Thunderbolt interface via ADDERLink XD522?
Answer: Thank you for your inquiry,

It is indeed - The ADDERLink XD522 was designed ground-up for high performance support of Mac Thunderbolt (and Mac Cinema Displays) at native Mac resolution (2560 x 1440).
ADDERLinjk XD-522-DP-PARI Supported Mac Thunderbolt Resolutions

All Mac Thunderbolt ports with DisplayPort, Mini-DisplayPort, or USB-C connectors (Thunderbolt 1, 2, and 3, respectively) also support the XD522 Dual-Mode DisplayPort (DP ++) feature. This means that you can also use monitors which only support HDMI or DVI, with your Mac Thunderbolt interface, through the Adder XD522 (using the correct adapter or cable). Note, the optional adapter needs to support at least DP 1.2 standard.

- To use a Thunderbolt 1 Mac (DP connectors) with XD522: Thunderbolt 1 is backwards compatible with DisplayPort; you can simply plug in the Mac to the XD522.
- To use a Thunderbolt 2 Mac (mDP connectors) with XD522: you can simply use a Mini-DisplayPort to DisplayPort adapter or cable.
- To use a Thunderbolt 3 Mac (USB-C connectors) with XD522: Please contact us for the ideal adapter.

Also note, as of today (April 6th, 2017), the XD522 does not currently support DisplayPort MST (Multi-Stream-Transport) for chaining multiple monitors together. Standard Dual Monitor is still supported using the (2) built-in DP video ports.

To read more general information about the Thunderbolt standard, about Thunderbolt adapters and cables, how to optimize Thunderbolt performance, etc see: Apple - About Thunderbolt ports and displays.

Question: Hello, is it possible to connect 2 Extenders, to get the application of 1 Server, 2 Extender and 4 Monitors?
Answer: Thank you for your inquiry,

You could indeed use 2x Adder XD522 to extend quad-monitor DisplayPort from 1 server. Keep in mind, to get regular multi-monitor control, your server will need 4x DisplayPort outputs. If you would like to mirror one or more server outputs to multiple monitors, you can use DisplayPort Splitter(s) in combination with the Adder XD522 extender(s).

Question: Will this box work with two 2560 x 1440 screens? (Two DisplayPort cables, each cable running at 2560x1440)
Answer: Thank you for your inquiry.

The total video bandwidth supported by this device is 308 MegaPixels per second (Mpix/sec). The Max bandwidth for Video port 1 can be up to 280 Mpix/sec, while port 2 can use a maximum of 154 MPix/sec (subject to port 1 using no more than 154 MPix/sec of the available total bandwidth).

The bandwidth requirement for 2560x1440@60Hz as reported by Adder is 242Mpix/Sec. So, unfortunately it does not appear this device would support two screens with a resolution of 2560 x 1440. For two monitors, it appears the highest resolution is 2048x1080@60Hz.

Here are the tested resolutions for this device:
Combined maximum pixel clock: 308 Mpixels/sec

Video Head 1 video resolution <> Video Head 2 video resolution
2048x2048@60Hz 279Mpix/Sec <> Not supported
2560x1600@60Hz 269Mpix/Sec <> Not supported
2560x1440@60Hz 242Mpix/Sec <> Not supported
3840x2160@30Hz 263Mpix/Sec <> Not supported
4096x2160@30Hz 280Mpix/Sec <> Not supported
2048x1080@60Hz 147Mpix/Sec <> 2048x1080@60Hz 147Mpix/Sec
2048x768@60Hz 105Mpix/Sec <> 2048x768@60Hz 105Mpix/Sec
1920x1200@60Hz 154Mpix/Sec <> 1920x1200@60Hz 154Mpix/Sec
1920x1080@60Hz 138Mpix/Sec <> 1920x1080@60Hz 138Mpix/Sec
1680x1050@60Hz 119Mpix/Sec <> 1680x1050@60Hz 119Mpix/Sec
1600x1200@60hz 130Mpix/sec <> 1600x1200@60hz 130Mpix/sec

You can read more about the max resolutions supported in the PDF Manuel linked here: Please feel free to contact your KVM Switches Online representative at 1-877-586-6654 or via our online chat feature to discuss your project in greater detail.

Product Reviews

5 out of 5, Based on 1 Reviews.
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November 29, 2013

Was an easy install and has been faultless since