Safety precautions
To ensure the best from the product, please read all instructions carefully before using the device. Save this manual for further reference.
- Unpack the equipment carefully and save the original box and packing material for possible future shipment
- Follow basic safety precautions to reduce the risk of fire, electrical shock and injury to persons.
- Do not dismantle the housing or modify the module. It may result in electrical shock or burn.
- Using supplies or parts not meeting the products’ specifications may cause damage, deterioration or malfunction.
- Refer all servicing to qualified service personnel.
- To prevent fire or shock hazard, do not expose the unit to rain, moisture or install this product near water.
- Do not put any heavy items on the extension cable in case of extrusion.
- Do not remove the housing of the device as opening or removing housing may expose you to dangerous voltage or other hazards.
- Install the device in a place with fine ventilation to avoid damage caused by overheating.
- Keep the module away from liquids.
- Spillage into the housing may result in fire, electrical shock, or equipment damage. If an object or liquid falls or spills on to the housing, unplug the module immediately.
- Do not twist or pull by force ends of the optical cable. It can cause malfunction.
- Do not use liquid or aerosol cleaners to clean this unit. Always unplug the power to the device before cleaning.
- Unplug the power cord when left unused for a long period of time.
- Information on disposal for scrap devices: do not burn or mix with general household waste, please treat them as normal electrical wastes.
Introduction
The PT-PSW-21CC-KVM is an 18G dual USB-C KVM Switcher. The switcher is designed to switch two USB-C inputs to a single HDMI output and provide full Gigabit Ethernet, as well as access to 5Gbps SuperSpeed peripherals. Each USB-C input provides an ideal interface for connecting to any modern laptop or USB-C video and data source. It also provides up to100W Power Delivery (shared) to the input devices. In addition, there are built-in EDID&HDCP settings, plus balanced audio de-embedding.
Feature
- 18G 2x1 switcher with dual USB-C inputs;
- HDMI 2.0, 4K@60Hz 4:4:4, HDR 10, HDCP 2.2;
- 5G data transfer rate from peripherals;
- Support 100W Shared Power Delivery;
- Support automatic 4K down-scaling to 1080P;
- Each device port provides 5V 900mA power supply;
- Balanced analog audio for output audio de-embedding.
Package List
- 1x PT-PSW-21CC-KVM
- 2x Mounting ears & 4x Screws
- 4x Rubber feet
- 1x Power adapter (24V, 6.5A)
- 1x 5-pin Terminal block
- 1x Manual
Note: Please contact your distributor immediately if any damage or defect in the components are found.
Panel Description
Front Panel
| No. | Name | Description |
|---|---|---|
| 1 | Power LED | The LED illuminates blue when the device is powered on; The LED illuminates red when the device is in standby. |
| 2 | SELECT | The indicator light corresponding to the currently selected source is on. The indicator light of this button describes the mode: Blue light indicates Auto Mode; Red light indicates Manual Mode. |
| 3 | Input 1 & 2 | 2x Type-C USB with PD 3.0 100W shared charging to connect video sources. |

| No. | Name | Description |
|---|---|---|
| 4 | DISPLAY | Press ON to turn on the display. Press OFF to turn off the display. Press to mute/unmute display audio. |
Rear Panel
| No. | Name | Description |
|---|---|---|
| 1 | EDID/HDCP | 4-pin DIP switch for EDID/HDCP settings. |
| 2 | FW | 1x USB-C port for firmware upgrade. |
| 3 | HDMI OUT | 1x Type-A female HDMI output port to connect video display. |
| 4 | AUDIO OUT | 1x 5-pin terminal block for balanced audio output. |
| 5 | RS232 | 1x 3-pin terminal block to connect control device (e.g. PC) or third-party device for RS232 control. |
| 6 | GIGABIT | 1x RJ-45 port, network transparent transmission. Green light for Link, yellow light for data. |
| 7 | DEVICES | 2x USB3.2 Gen1 Type-A ports(5Gbps) to connect KVM devices. Each device port provides 5V 900mA power supply. |
| 8 | DC 24V | DC port for power adapter connection. |

Specification
| Video | |
|---|---|
| Input | 2x USB-C IN(USB 3.2 Gen1) |
| Input Connector | 2x Type-C USB |
| Input Resolution | Up to 4K 60Hz 4:4:4 |
| Output | 1x HDMI |
| Output Connector | 1x Type-A female HDMI |
| Output Resolution | Up to 4K 60Hz 4:4:4 |
| Resolution UHD/HD/SD | 3840x2160@60/59.9/30/29.97/24/23.98 Hz 3840x2160@30/29.97/25/24/23.98 Hz 1080p@60/59.9/50/30/29.97/25/24/23.98 Hz 720p@60/50 Hz |
| Analog Audio | |
| Format | 1x AUDIO OUT (Stereo 2-Channel) |
| Balanced Output | +6 dBu nominal gain, +8 dB headroom |
| Frequency Response | 20 Hz to 20 kHz, + 0.5 dB |
| THD+N | <0.05% at 20 Hz to 20 kHz |
| SNR | >90 dB at 1 kHz, zero clipping @ 0 dBFS, unweighted |
| Digital Audio | |
| Optical Output | PCM 2Ch (De-embedded) |
| HDMI Output | PCM 2Ch, LPCM 5.1, LPCM 7.1, Dolby® Digital, DTS® 5.1, Dolby Digital PlusTM, Dolby TrueHD, DTS-HD Master AudioTM |
| HDMI - PCM 2 | PCM 2Ch |
| Sample Rate | 44.1kHz,48kHz,96kHz,192kHz |
| Bit Rate | up to 24-bit |
| THD+N | <0.05% @ 1 kHz at maximum level |
| SNR | 130dB |
| Frequency Range | 20Hz to 20kHz |
| USB | |
| USB device version | USB 3.2Gen1 5Gbps |
| USB device connector | 2x USB-A |
| USB device power | Max 4.5W per port |
| USB Host version | USB 3.2Gen1 5Gbps |
| USB Host power | Max PD 3.0 100W shared* |
| Number of USB hubs | 2 USB hub when transmitting USB 2.0 signals 1 USB hub when transmitting USB 3.0 signals |
| * | To understand the sharing mode, please check page 10. |
| Ethernet | |
| Port | 1x RJ45 |
| Standards and Protocols | HTTPS, Telnet, mDNS |
| Speeds | 10/100/1000 Mbps |
| Addressing | DHCP, Static - selectable through rear panel, IP & RS-232 commands, and built-in web server. |
| General | |
| HDCP Version | Input: HDCP 2.2, HDCP 1.4 compliant |
| Operation Temperature | -10 to +55℃(+14° to +131°F) |
| Storage Temperature | -25 to +70℃(-13° to +158°F) |
| Relative Humidity | 10% to 90%, Non-condensing |
| Power Supply | DC24V 6.5A |
| Power Consumption | 125W(Max) |
| Dimension (W*H*D) | 195 x 24.5 x 125 mm |
| Net Weight | 545g |
Automatic Switching
Press and hold the SELECT button for at least three seconds to enable automatic switching.
When in the AUTO mode, the unit will switch according to the following rules:
- New host: Once detecting a new host, the unit will automatically select the new host.
- Pressing the SELECT button will forcibly change the host even in AUTO mode.
- After reboot: Once power is restored to the unit, it will automatically reconnect the host that was active before the reboot.
- Source removed: When an active host is removed, the switcher will switch to the other active host.
- Press and hold the SELECT button for at least three seconds and the unit will exit AUTO mode and the host will not change.
Display Control
Manual Control: Press the below DISPLAY buttons on the front panel to simultaneously send RS232 and CEC commands to control the display device.
ON: Display On.
OFF: Display Off.
: Mute/Unmute display audio.
EDID Settings
The switch represents “0” when in the lower (OFF) position, and it represents “1” in the upper (ON) position.
The Extended Display Identification Data (EDID) is used for the source device to match its video resolution with the connected display. By default, the source device obtains its EDID from the first connected display. Meanwhile, since the displays with different capabilities are connected to the switcher, pins1~3 of the DIP switch on the front panel can be used to set the EDID to a built-in fixed value.
| Switch Status | Video Resolution | Audio Format |
|---|---|---|
| 000 (Default) | Get the EDID of the display device | |
| 001 | 1920x1080p@60Hz 4:4:4 8bit | Audio 2CH PCM |
| 010 | 3840x2160@30Hz 4:4:4 8bit | Audio 2CH PCM |
| 011 | 3840x2160@60Hz 4:4:4 8bit | Audio 2CH PCM |

| 100 | 3840x2160@30Hz 4:4:4 8bit | Audio 7.1CH DTS/Dolby/HD |
|---|---|---|
| 101 | 3840x2160@60Hz 4:4:4 8bit | Audio 7.1CH DTS/Dolby/HD |
| 110 | 3840x2160@60Hz 4:4:4 8bit HDR | Audio 5.1CH DTS/Dolby |
| 111 | User Defined |
HDCP Settings
High-bandwidth Digital Content Protection (HDCP) is a copy-protection scheme to eliminate the possibility of capturing digital content from the source to the display. Pin4 of the DIP switch on the front panel can be used to set HDCP.
| Switch Status | Description |
|---|---|
| 1 | HDCP follow display. |
| 0 (Default) | If the source has HDCP, the output will be set to HDCP1.4; If the source has no HDCP, the output will be set to no HDCP. |
USB Host Power
The total USB host power supply is 100W and there are 3 modes can be set via RS232 commands, as defined below:
| Power Mode | Description |
|---|---|
| Follow Selected Source | Power supply 100W to the currently selected source, the source can be judged by the INPUT signal LED. |
| Always Input 1/ Input 2 | Fixed power supply of 100W to one input source(IN 1 or IN2 ). |
| Inputs equalization(Sharing) | Two input sources share 100W power supply, and each port is fixed at 50W. |
RS232 Control
Connect an RS232 cable to a control device (e.g. PC) with an RS232 cable. The switcher can then be controlled by sending RS232 commands. The baud rate is selectable as follows: 2400, 4800, 9600(default), 19200, 38400, 57600 or 115200.
RS232 Control Software
- Installation
Please download the latest Software Version from the link below:
https://docklight.de/download/Docklight.zip
Then follow the installation wizard for installation on Windows 7 and 10.
After the installation, Docklight can be run for the first time and should look like the below screen shot:
Registration is not necessary unless you wish to save settings on exit, so unless you wish to register click on "OK" to close the window.

The next pop-up window can also be closed with "Continue". An empty project is enough to send and receive commands easily (The default setting is always “Start with a blank project / blank script“)

Now you are in the main view, where commands are sent and feedback is received.
Click “Continue” to close this window.
Click “OK” to close this window.
The next step is to select the correct COM port of the PC. To do this, double-click on "COM1" in the corresponding setup window.
In the following window, select the drop-down menu labeled "Send / Receive on Comm Channel", select the appropriate COM port and then click on "OK" at the bottom right corner.
All other settings can be left at default for most applications, but refer to device RS232 settings to be sure.
Double click on “COM1” to change to the right COM port.

In order to be able to send commands, open communication with the device by clicking on "Play". (1)
Then the keyboard function must be activated, so that commands can be written in the "communication window". (2)
Finally enter the command, then confirmed by pressing "Enter" to send. Any response from the connected device will appear in red. (3)
Select the right COM port.

Enable the keyboard type in function.
Click “Play” to open the communication.
Monitoring area, indicates if the command sent works.
Command sending area
RS232 Command
Communication protocol: RS232 Communication Protocol
Baud rate: 9600
Data bit: 8
Stop bit: 1
Parity bit: none
Note: Commands are not case sensitive;Commands are not space sensitive;Commands end with ".";When the command is wrong, the feedback is "Invalid Command!".
| Command | Description | Feedback Example |
|---|---|---|
| POWON. | Power on | Power On! |
| POWOFF. | Power off | Power Off! |
| HDMI[x]. | Input source selection. x = 1(USB-C IN 1 selected), x = 2(USB-C IN 2 selected) | HDMI Out Switch To 01! |
| HDMIA. | Auto-switch mode on | HDMI Out Switch Auto Mode! |
| HDMIM. | Manual-switch mode on | HDMI Out Switch Manual Mode! |
| LOCK. | Turn on front panel lock | Front Panel Locked! |
| UNLOCK. | Turn off front panel lock | Front Panel UnLock! |
| RST. | Restore Factory | Factory Default! |
| SIGNALTRG[xx]MODE. | Set the detection mode xx=1, it is 5V detection; when xx=2, it is TMDS detection. | SIGNALTRG01MODE. Set Trigger Mode To 5V. |
| SIGNALTRGSTA. | Query the method of signal detection (TMDS or 5V) | Trigger Mode Is 5V. |
| STA. | Status query ...... | |
| KEYCOMMAND[X]. | Set display key command(CEC,RS232) | KEYCOMMAND1. Display Key Command CEC And RS232! KEYCOMMAND2. Display Key Command Only CEC! KEYCOMMAND3. Display Key Command Only RS232! |
| SetDevicePowerMode[XX]. | Set the device power supply mode. XX = 00-01; 00: Follow Host; 01: Always On | SetDevicePowerMode 00. SetDevicePowerMode: Follow Host! |
| SETSTANDBYTIME[yy]. | Set the delay time for disconnecting 5V output after no source :3-1800(unit: seconds) | SETSTANDBYTIME10. Set POFF Delay To 10 Second(s)! |
| TVON. | Turn on by CEC control | CEC_TV_POWON! |
| TVOFF. | Turn off by CEC control | CEC_TV_POWOFF! |
| TVMUTE. | TV mute by CEC control | CEC_TV_VOLMUTE/UNMUTE! |
| AOUTOFF. | Audio de-embedding off | Audio De-embedding Off! |
| AOUTON. | Audio de-embedding on | Audio De-embedding On! |
| SetUSBCPowerMode[XX]. | Set USB-C charging mode. [XX]=00-03; 00: Follow Selected Source; 01/02:Always Input 1/ Input 2; 03: Inputs Equalization | SetUSBCPowerMode 00. SetUSBCPowerMode: Follow Selected Source! |
| /+[X]:XXX. | RS232 sends commands to control peripheral devices. [X] = 1~7 (Baud Rate) 1--2400;2--4800;3--9600;4--19200;5--38400;6--57600;7--115200; XXX: Any ASCII code | /+3:123456. 123456 |
| CMDON/+[X]:XXX. | Set the ASCII RS232 command XXX to be sent to control the third-party device when the DISPLAY ON button is pressed. | CMDON/+3:455665. CMD_ON Save Success! |
| CMDOFF/+[X]:XXX. | Set the ASCII RS232 command XXX to be sent to control the third-party device when the DISPLAY OFF button is pressed. | CMDOFF/+3:455665. CMD_OFF Save Success! |
| CMDVOLMUTE/+[X]:XXX. | Set the ASCII RS232 command XXX to be sent to control the third-party device when the VOLUME MUTE button is pressed. | CMDVOLMUTE/+3:455665. CMD_VOLMUTE Save Success! |
| EDIDUpgrade[xx]. | The serial port upgrades EDID data. 1.[xx]=00-02 means to customize the EDID of the corresponding input port (EDID is switched to the custom EDID after customization, and will not be saved in the machine); 00 :All input ports 01-02 :Input 01-02; 2. [xx]=U1 means custom built-in EDID (can be saved in the machine and recalled at any time), only one built-in EDID can be customized, and the current EDID still used after the customization is completed will not switch to the customized EDID. After receiving the instruction, the machine will prompt to send the EDID file. The file format must be .bin within 10s (in order to ensure normal data reception, all HDBaseT must be disconnected before sending the instruction). | EDIDUpgrade01. EDIDUpgradeU1. Input XX/User Define EDID Upgrade OK! |
| Baudrate[XXX]. | Set control baud rate. Supports 2400, 4800, 9600, 19200, 38400, 57600, 115200. | Set Local RS232 Baudrate To 9600! |
| STA_HDCP. | Query the current HDCP status | STA_HDCP. DIP Passive, HDCP Management! |
| HDCP_ON. | Forced to open the output HDCP, output HDCP1.4. | HDMI Out HDCP On! |
| HDCP_DIP. | Select HDCP definition of DIP Switch | HDCP_DIP. DIP Passive, HDCP Management! DIP Active, HDMI Out HDCP Follow Display! |
After-Sales Service
If there appear some problems when running the product, please check and deal with the problems referring to this user manual. Any transport costs are borne by the users during the warranty.
- Product Limited Warranty: This product will be free from defects in materials and workmanship for three years (The purchase invoice shall prevail). Proof of purchase in the form of a bill of sale or receipted invoice which is evidence that the unit is within the Warranty period must be presented to obtain warranty service.
- What the warranty does not cover (servicing available for a fee):
- Technical Support: For any questions or problems, contact your distributor or reseller and tell them the respective product name and version, the detailed failure situation as well as the formation of the cases.
- Warranty expiration.
- Factory applied serial number has been altered or removed from the product.
- Damage, deterioration or malfunction caused by:
- Normal wear and tear.
- Use of supplies or parts not meeting our specifications.
- No certificate or invoice as the proof of warranty.
- The product model showed on the warranty card does not match with the model of the product for repairing or had been altered.
- Damage caused by force majeure.
- Servicing not authorized by distributor.
- Any other causes which does not relate to a product defect.
- Delivery, installation or labor charges for installation or setup of the product.
Asking for Assistance
Technical Support
Phone: +49 5971 800299 - 0
Fax: +49 5971 800299 – 99
Technical Support Hours:
8:30 AM to 5:00 PM Monday thru Thursday
8:30 AM to 4:00 PM Friday
Write to:
PureLink GmbH
Von-Liebig-Straße 10
D - 48432 Rheine
Legal & Compliance
Product identification
Model: PT-PSW-21CC-KVM – manual version 1.0
Trademarks and disclaimer
Product model and logo are trademarks. All other company and product names mentioned are trademarks of their respective owners. All rights reserved. No part of this publication may be copied or reproduced without prior written permission. We reserve the right to make changes to the device, packaging or manual and accept no liability for misprints.
EU conformity
PureLink hereby declares that this product PureTools PT-PSW-21CC-KVM complies with Directives 1907/2006/EU and 2011/65/EU. PureLink GmbH hereby declares that this product PureTools PT-PSW-21CC-KVM complies with Directives 2014/30/EU and 2014/35/EU.
| Directive / Regulation |
|---|
| 1907/2006/EU |
| 2011/65/EU |
| 2014/30/EU |
| 2014/35/EU |
The full text of the EU Declaration of Conformity is available at: http://www.purelink.de/ce/4251364743393_CE.pdf
FCC
Statement This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. It has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a commercial installation.
Disposal of electrical and electronic equipment
WEEE reg. no.: DE 93847290
The crossed-out wheelie bin symbol on the product, packaging or in this manual means that electrical and electronic equipment must not be disposed of with household waste at the end of its life. Hand in old devices free of charge at a public collection point or return them to a distributor obliged to take them back. Remove batteries and lamps that can be removed without destroying the device before handing it in, and delete any personal data stored on the device. Details are regulated by national law. By returning old devices you help protect the environment.
Packaging
Dispose of packaging separately by material (paper/cardboard, plastics) via the local collection systems. Keep packaging material away from children – risk of suffocation. Packaging register LUCID: DE5958616449295.

