AV Access 4KSW21-DM User manual

4KSW21-DM
2 x 1 Dual-Monitor KVM Switcher
User Manual

Disclaimers
The information in this manual has been carefully checked and is believed to be
accurate. AV Access Technology Limited assumes no responsibility for any
infringements of patents or other rights of third parties which may result from its
use.
AV Access Technology Limited assumes no responsibility for any inaccuracies that
may be contained in this document. AV Access Technology Limited also makes no
commitment to update or to keep current the information contained in this
document.
AV Access Technology Limited reserves the right to make improvements to this
document and/or product at any time and without notice.
Copyright
Copy, Reproduce, Distribute and/or Edit of this document or part of it as well as
utilization of its contents and communication thereof to others without express
authorization are prohibited. Offenders will be held liable for payment of damages.
All rights created by patent grant or registration of a utility model or design patent
are reserved. Copyright ©2017 AV Access Technology Limited All rights reserved.
Trademarks Notice
All products or service names mentioned in this document may be trademarks of
the companies with which they are associated.
Contact Us
Email: [e-mail]

Important Safety Instructions
Do not expose this device to rain, moisture, dripping or splashing. No objects
filled with liquids, such as vases, shall be placed on the device.
Do not install or place this unit in a bookcase, built-in cabinet, or in another
confined space. Ensure the unit is well ventilated.
To prevent risk of electric shock or fire hazard due to overheating, do not
obstruct the unit’s ventilation openings with newspapers, tablecloths,
curtains, or similar items.
Do not install near any heat sources such as radiators, heat registers, stoves,
or other device (including amplifiers) that produce heat.
Do not place sources of naked flames, such as lighted candles, on the unit.
Clean this device only with dry cloth.
Unplug this device during lightning storms or when unused for long periods
of time.
Protect the power cord from being walked on or pinched, particularly at
plugs.
Only use attachments / accessories specified by the manufacturer.
Refer all servicing to qualified service personnel

www.avaccess.com
1
[e-mail]
Table of Contents
Introduction..........................................................................................................2
Overview .................................................................................................................................. 2
Features .................................................................................................................................... 2
Package Contents.................................................................................................................. 3
Panel .......................................................................................................................................... 4
Front Panel ..................................................................................................................... 4
Rear Panel ....................................................................................................................... 5
Application ...........................................................................................................6
KVM Mode................................................................................................................................ 6
USB Mode................................................................................................................................. 7
Control of the Switcher ........................................................................................8
Front Panel Control............................................................................................................... 8
Hotkey Function..................................................................................................................... 8
Specifications .......................................................................................................9
Trouble Shooting................................................................................................11
Warranty .............................................................................................................12

Introduction
www.avaccess.com
2
[e-mail]
Introduction
Overview
4KSW21-DM is a 2x1 HDMI KVM Switcher with dual-channel switching and hotkey
switching. It supports HDMI 2.0 and HDCP 2.2 compatibility, and supports
resolutions up to 4K@60Hz 4:4:4 8bit and can also transmit USB 3.0 signal up to
5Gbps for KVM function. It can share two monitors and USB devices between two
PCs and supports two modes to operate.
The switcher features virtual interaction function, and automatically wake-up the
connected PC in standby mode, which can reduce the switching time. It also
supports direct switching through buttons on front panel and hotkey through
keyboard connected to the special USB 1.1 port. It provides a wide compatibility
choice for different operating systems, such as Windows, Mac OS and Linux, no
driver required and simple plug and play.
Features
2 in 1 dual-channel KVM switcher:
Each input group support two independent HDMI input channels,
which can be connected to two HDMI output ports of the PC and
extended to two external monitors.
Each monitor has independent channel, which can support different
resolution.
Supports HDMI 2.0 with resolutions up to 4K@60Hz 4:4:4 8bit and HDCP 2.2
compatibility.
Supports all HDR format, such as HDR 10, HLG, HDR 10+ and Dolby Vision.
Supports USB 3.0 super-speed data transmission with speed up to 5Gbps.
Supports new generation PC automatic wake-up function, when switch to

Introduction
www.avaccess.com
3
[e-mail]
the PC in sleep mode, it will automatically wake up the PC and no other
operations are needed.
Fast switching, based on the virtual interaction function.
One USB 1.1 port for keyboard and three USB 3.0 ports for USB devices.
Supports microphone input and headphone output for audio application.
Supports KVM and USB operation mode, which can be selected via the DIP
switch on front panel.
Supports button switch and hotkey switch (Keyboard must be connected to
USB 1.1 port).
Supports CEC trigger on HDMI outputs.
No driver required, plug and play.
Package Contents
Before you start the installation of the product, please check the package
contents:
Switcher x 1
Power Adapter (DC 12V 3A) x 1
AC Power Cord with US Pins x 1
AC Power Cord with EU Pins x 1
AC Power Cord with UK Pins x 1
USB 3.0 Type-A to Type-B Cable (L=1.8m) x 2
User Manual x 1

Introduction
www.avaccess.com
4
[e-mail]
Panel
Front Panel
1 2 3 4 5 6 7
No.
Name
Description
1 Power Switch Press to power on/off the device.
2 Mode
KVM: Set the device to “KVM” mode (default).
USB: Set the device to “USB” mode.
Note: Detail information, please refer to “Application”
section.
3 Switch Button
and LED 1&2
Press to select input group between HDMI In 1A/1B and
HDMI In 2A/2B.
LED 1&2:
On: Select HDMI In 1A and 1B or HDMI In 2A and 2B as
input sources.
Off: The corresponding HDMI Inputs are not selected.
4 USB 1.1
USB 1.1 type-A port, can be used to connect to a USB
keyboard for hotkey function. (Detail information,
please refer to “Hotkey Function” section)
Note: It is specialized for connecting keyboard and not
recommended to connect to other USB slave devices.
5 USB 3.0
USB 3.0 type-A ports, can be used to connect to USB 3.0
high-speed device for KVM function.
Note: With one high power port of 5V 1.5A supported,
it can be used for connecting USB devices with high
power, such as connecting a USB Camera.
6 MIC In Connect to a Microphone. The Microphone follows the
USB Host port selected.
7 Line Out Connect to an earphone. The earphone follows the USB
Host port selected.

Introduction
www.avaccess.com
5
[e-mail]
Rear Panel
13 4 5 6 7 89
No. Name Description
1 DC 12V Connect to the power adapter provided.
2&4 HDMI In 1A &
1B
Connect to two HDMI output ports of PC respectively.
HDMI In 1A and HDMI In 1B can be seen as a group,
hereinafter referred to as group 1 in this manual.
3 USB Host 1
Connect to a host device. USB Host 1 is bound with
group 1. When select group 1 as sources to input, the
USB devices can be connected to the host PC
connected to USB Host 1 port.
5&7 HDMI In 2A &
2B
Connect to two HDMI output ports of PC respectively.
HDMI In 2A and HDMI In 2B can be seen as a group,
hereinafter referred to as group 2 in this manual.
6 USB Host 2
Connect to a host device. USB Host 2 is bound with
group 2. When select group 2 as sources to input, the
USB devices can be connected to the host PC
connected to the USB Host 2 port.
8 Monitor A & B Connect to HDMI displays.
9 Update Micro USB, for firmware upgrade.

Application
www.avaccess.com
6
[e-mail]
Application
Warnings:
Before wiring, disconnect the power from all devices.
During wiring, connect and disconnect the cables gently.
The switcher supports two application modes: KVM mode and USB mode. It can
be set through DIP switch on front panel. By default, the switcher is in KVM mode.
KVM Mode
Switch the DIP switch to “KVM” mode. Wiring as the following figure.
Rear Panel
Front Panel
PC 1 PC 2Power Supply
HDMI In HDMI
In
HDMI
In
HDMI In HDMI Out HDMI OutUSB
Host
USB
Host
Monitor 1 Monitor 2
PC 1A/2A PC 1B/2B
Earphone
MICMouse
Removable
Hard Disk
Keyboard
USBUSBUSB USB MIC
In
Line Out
Camera

Application
www.avaccess.com
7
[e-mail]
In this mode, when switch input source to group 1 or group 2:
The connected USB devices, microphone and earphone can be connected
to Host PC 1 or 2.
When switch to group 1, the display connected to Monitor A and Monitor B
will output video from HDMI In 1A and HDMI In 1B respectively. When
switch to group 2, the display connected to Monitor A and Monitor B will
output video from HDMI In 2A and HDMI In 2B respectively.
USB Mode
Switch the DIP switch to “USB” mode. Wiring as the following figure.
Rear Panel
Front Panel
PC 1 PC 2Power Supply
HDMI In HDMI
In
HDMI Out HDMI OutUSB
Host
USB
Host
Monitor 1 Monitor 2
PC 1A PC 2A
Earphone
MICMouse
Removable
Hard Disk
Keyboard
USBUSBUSB USB MIC
In
Line Out
Camera
In this mode, when switch input source to group 1 or group 2:
The connected USB devices, microphone and earphone can be connected
to the Host PC 1 or 2.
The displays connected to Monitor A and Monitor B will constantly output
video from HDMI In 1A and HDMI In 2A respectively.

Control of the Switcher
www.avaccess.com
8
[e-mail]
Control of the Switcher
You can choose to switch input sources at your convenience through front panel
button or Hotkey function.
Front Panel Control
Users can choose to use front panel button to do basic switching operations.
Connect the switcher as required and power on all the attached devices.
Press the button to switch sources
between Group 1 and Group 2
Hotkey Function
One USB 1.1 port on rear panel of the switcher supports keyboard Hotkey
function.
Supported Hotkey:
1. Tab (default)
2. Left Ctrl
3. Right Ctrl
4. Caps Lock
Key Operation Function
Press the “Hotkey” twice quickly Switch to this hotkey.
Press “Hotkey” +”1” Switch to input group 1.
Press “Hotkey” +”2” Switch to input group 2.

Specifications
www.avaccess.com
9
[e-mail]
Key Operation Function
Press “Hotkey” + “Left” Switch to previous input group (Cycle group
2->1).
Press “Hotkey” + “Right” Switch to next input group (Cycle group 1->2).
For example:
If you want to use the “Left Ctrl” as a hotkey, press the “Left Ctrl” key twice quickly
to switch the hotkey to it, and other hotkeys are invalid. If you need to use other
hotkeys, please repeat the above steps.
Specifications
Technical
Video Signal
HDMI: HDMI with 4K@60Hz 4:4:4, HDCP 2.2
USB Data USB 3.0, up to 5Gbps data transfer rate. With one high-
power of 5V/1.5A port included.
Input/Output Resolution
Supported
SMPTE:
1280x720P1,2,3,4,5,6,7,8, 1920x1080I6,8, 1920x1080P1,2,3,4,5,6,7,8,9,
2560x10809, 3840x10809, 3840x21602,3,5,6,8,
4096x21602,3,5,6,8
VESA:
800x6008, 1024x7688, 1280x7688, 1280x8008, 1280x9608,
1280x10248, 1360x7688, 1366x7688, 1400x10508,
1440x9008, 1600x9008, 1600x12008, 1680x10508,
1920x12008, 2560x144010
1 = at 23.98 Hz, 2 = at 24 Hz, 3 = at 25 Hz, 4 = at 29.97 Hz, 5
= at 30 Hz, 6 = at 50 Hz, 7 = at 59.94 Hz, 8 = at 60 Hz,
9 = 120Hz, 10 = 144Hz
HDR Format Supported All HDR formats, including HDR 10, HLG, HDR 10+ and
Dolby Vision
Audio Format Supported
HDMI:Fully supports audio formats in HDMI 2.0
specification, including PCM 2.0/5.1/7.1, Dolby TrueHD,
Dolby Atmos, DTS-HD Master Audio and DTS:X
MIC IN: Stereo
LINE OUT: Stereo
Max Data Rate
18 Gbps

Specifications
www.avaccess.com
10
[e-mail]
General
Operating Temperature
0°C to + 45°C (32 to + 113 °F)
Storage Temperature
-20 to +70°C (-4 to + 158 °F)
Humidity
20% to 90%, non-condensing
Power Consumption
(Maximum)
3.6W
Device Dimensions
(W x H x D)
230mm x 26.2mm x 142.6mm/ 9.06’’ x 1.03’’ x 5.61’’
Product Weight
0.83kg/1.83lbs
Transmission Distance
Cable Range Supported Video
HDMI Input/Output: 5m/10ft
1080P@60Hz 24bpp
4K@30Hz 4:4:4 24bpp
4K@60Hz 4:2:0 24bpp
Input/Output: 3m/10ft
4K@60Hz 4:4:4 24bpp

Trouble Shooting
www.avaccess.com
11
[e-mail]
Trouble Shooting
Steps of Regular Troubleshooting Routine
1Power: Please make sure all devices are powered on. (source, switcher,
display devices).
2Devices: Please make sure picture can be shown normally when connecting
source to display devices directly.
3Cable: Plug in and out HDMI/USB cable or try another HDMI/USB cable.
4Compatibility: Please test other source and display devices to determine
whether it is a compatibility issue.
Typical Questions:
1Power: The switcher is not powered on.
Please ensure the power button on front panel is pressed to turn on the
switcher.
2Video:
a. The video can’t be switched.
Please ensure the switcher is set to KVM mode. If it is in USB mode,
only the connected USB devices can be switched.
b. USB devices aren’t connected to the input source currently displayed.
Please ensure USB Host and HDMI In ports in a group are connected to
the same PC.
3Hotkey: Hotkey function is disabled.
Please ensure the keyboard is connected to the USB port specially for
keyboard (USB 1.1 port).

Warranty
www.avaccess.com
12
[e-mail]
Warranty
Products are backed by a limited1-year parts and labor warranty. For the
following cases AV Access Technology Limited shall charge for the service(s)
claimed for the product if the product is still remediable and the warranty card
becomes unenforceable or inapplicable.
1. The original serial number (specified by AV Access Technology Limited)
labeled on the product has been removed, erased, replaced, defaced or is
illegible.
2. The warranty has expired.
3. The defects are caused by the fact that the product is repaired, dismantled
or altered by anyone that is not from an AV Access Technology Limited
authorized service partner. The defects are caused by the fact that the
product is used or handled improperly, roughly or not as instructed in the
applicable User Guide.
4. The defects are caused by any force majeure including but not limited to
accidents, fire, earthquake, lightning, tsunami and war.
5. The service, configuration and gifts promised by salesman only but not
covered by normal contract.
6. AV Access Technology Limited preserves the right for interpretation of
these cases above and to make changes to them at any time without notice.
Thank you for choosing products from AV Access.

AV Access Technology Limited
V1.0.0