Safety Precautions
- 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-E-U321-H is a 2x1 USB3.2 Gen1 data only switch with Cat extension. The extender is designed to transmit USB3.x data up to 100m distance. It is the host side of the extender and it contains one Type-B and one Type-C for auto switching or manual switching of a PC or laptop. It also has two local USB-A ports with 5V 500mA shared power supply for local peripherals. The extender also supports two-way 24V PoC power supply. Applications include extending conferencing cameras, video capture devices, and audio devices for boardrooms and conference rooms or for any high bandwidth data device.
Feature
- 2x1 USB 3.2 Gen1 5Gbps extender switch;
- Extends USB signals up to 100m with CAT6A cable;
- Supports RS232 pass-through/control/upgrade;
- Supports PD 3.0 100W charging to HOST;
- Auto/manual switching mode;
- Two-way 24V PoC power supply;
Package List
- 1x PT-E-U321-H
- 2x Mounting ears & 4x Screws
- 1x Manual
- 1x Power adapter (24V, 1.5A)
- 4x Rubber feet
Note: Please contact your distributor immediately if any damage or defect in the components are found. 100m range is the maximum possible range under ideal circumstances; it is recommended that around 80-90m be the limit when the quality or length of cable is unknown
Front Panel
| No. | Name | Description |
|---|---|---|
| ① | Power LED | The LED illuminates green when the unit is power on. |
| ② | HOST | 1x USB 3.2 Gen1 Type-B and 1x USB 3.2 Gen1 Type-C, connecting to the PC or Laptop. |
| ③ | SELECT | LED 1 &2: The LED illuminates blue when switching to the corresponding host. Auto LED: The LED illuminates blue when in auto switching mode and is off when in manual switching mode. AUTO/3s: Press button to switch the host. Press and hold the button 3 seconds to switch the switching mode. |

Note: The factory default switching mode is AUTO.
Rear Panel
| No. | Name | Description |
|---|---|---|
| ① | DEVICES | 2x USB 3.2 Gen1 Type-A , shared 5V 500mA total and limit 5V 500mA per port; Connecting to the speakerphone and headset. |
| ② | PD IN | 1x Type-C USB with PD 3.0 100W charging to HOST 2(USB-C). |
| ③ | MODE | 1x 3-way DIP switch for selecting the RS232 port function. CTRL: Control the unit via RS232 commands. PASS: RS232 pass-through connection. FW: Firmware upgrade. |
| ④ | RS232 | 1x 3-pin terminal block. |
| ⑤ | HDBT-USB3 | 1x RJ45 port for connecting with the device unit of the extender pair. The yellow light indicates the connection status of the HDBT connection, and the green LED is the data light. |
| ⑥ | DC 24V | DC locking barrel port for power adapter connection. |

Specification
| Category | Item | Specification |
|---|---|---|
| USB | Host Connector | 1x Type-B USB, 1x Type-C USB |
| PD Connector | 1x Type-C USB | |
| Devices Connector | 2x Type-A USB | |
| Devices Power | 5V 500mA total | |
| USB Version | USB 3.2 Gen1 | |
| Number of Hub chips | 1 internal +1 additional for extension | |
| System example | PT-E-U321-H + PT-E-U34-D = 3 Hub chips total | |
| Control | Control | 1x Host Select, 1x RS232, 1x RS232 Mode Switch |
| Control Connector | 1x White Button, 1x 3-pin Terminal Block, 1x DIP Switch | |
| General | Transmit distance | Up to 100m with CAT6A cable |
| PoC standard | Two-way 24V PoC | |
| Data Rate | 5Gbps | |
| Operation | Temperature | -10 to +55°C |
| Storage Temperature | -25 to +70°C | |
| Relative Humility | 10% ~ 90% | |
| External Power Supply | DC24V 1.5A | |
| Power Consumption | 7.5W (Max) | |
| Dimension (W*H*D) | 133.0mm x 21.5mm x 105.0mm | |
| Net Weight | 320g |
HDBT-USB3
The RJ45 port is used for data transmission and supports 24V PoC power supply and 12-48V power supply. The yellow light indicates the connection status, and the green light indicates the data transmission status.
| Status | Definition |
|---|---|
| Yellow light off | No CAT cable / active connection. |
| Yellow light blink | Connecting or unstable connection between host and device. |
| Yellow light lit | Stable connection between host and device. |
| Green light off | No USB data signal is transmitting. |

| Status | Definition |
|---|---|
| Green light flashes regularly (for every 500ms) | USB 2.0 data transmitting. |
| Green light flashes irregularly (for uncertain interval) | USB data transmission fault. |
| Green light lit | USB 3.x data transmitting. |
Automatic Switching
Press and hold the SELECT button for at least 3 seconds to enable automatic switching. The current host will not be changed, and the AUTO LED will turn blue. When in AUTO mode, the switcher will switch according to the following rules:
- Press and hold the SELECT button at least three seconds to exit AUTO mode - host will not change and the AUTO LED will turn off.
- New host: Once detecting a new host, the unit will automatically select the new host.
- Press the SELECT button to forcibly change the host.
- Reboot: Once power is restored to the unit, it will automatically reconnect the host that was connected before the reboot.
- Source removed: When an active host is removed, the switcher will switch to the other active host.
RS232 Control Software
RS232 can be transmitted bi-directionally between the PT-E-321-H and any compatible receiver, in order to control third party RS232 devices at either side of the extender pair. The supported baud rates are 2400, 4800, 9600 (default), 19200, 38400, 57600 or 115200.
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“). Click “OK” to close this window. Click “Continue” to close this window.

Now you are in the main view, where commands are sent and feedback is received. 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!".
STA. Feedback Example:
Status query
PT-E-U321-H
2x1 USB3 Cat Extender Switch(Host-Side)
FW Version: 1.0.0b
Power On!
Front Panel Locked!
Local RS232 Baudrate Is 9600!
Auto Switch Off!
Host 2 Input!
RST. Feedback Example:
Restore Factory Factory Default!
Baudrate[XXX]. Feedback Example:
Set control baud rate. [XXX] Support 2400, 4800, 9600, 19200, 38400, 57600, 115200.
Baudrate9600.
Set Local RS232 Baudrate To 9600!
LOCK. Feedback Example:
Turn on front panel lock Front Panel Locked!
UNLOCK. Feedback Example:
Turn off front panel lock Front Panel UnLock!
AUTO_ON. Feedback Example:
Auto-switch mode on Auto Switch On!
AUTO_OFF. Feedback Example:
Manual-switch mode on Auto Switch Off!
HOST[x]. Feedback Example:
Host selection.
x = 1(HOST 1 selected)
x = 2(HOST 2 selected)
HOST1.
Set Host 1 Input!
After-Sales Service
If there are some problems when running the product, please check and deal with the problems by referring to this user manual. Any transport costs are borne by the users during the warranty period.
- 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
www.purelink.de
info@purelink.de
Legal & Compliance
Product identification
Model: PT-E-U321-H – 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.
FCC
FCC FCC FCC FCC Statement 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.
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.

