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User Manual for Digitus USB 2.0 CAT Extender DA-73120

Quick installation guide and user manual for the Digitus USB 2.0 CAT Extender (DA-73120). Includes connection diagrams, technical specifications, and troubleshooting tips for extending USB signals up to 150m.

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Manual images

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Quick guide from the manual

The Digitus USB 2.0 CAT Extender (DA-73120) allows you to transmit USB signals over distances of up to 150 meters using a CAT 6 (or higher) network cable. It is designed for use in offices, conference rooms, and industrial environments. The system consists of a transmitter unit (TX) and a receiver unit (RX), supporting transfer rates of up to 480 Mbps and providing four USB-A ports on the receiver side.

Important Safety Instructions

  • Ensure all apparatus is properly grounded to prevent electric shock.
  • Place the device in a well-ventilated area and do not block ventilation openings.
  • Do not expose the device to rain or place it near water.
  • Do not place the device on uneven or unstable surfaces.
  • Do not insert metallic objects into the device.
  • If using a third-party power supply, ensure it meets the product requirements (DC 5V/1A).

Package Content

  • 1x Transmitter
  • 1x Receiver
  • 1x Quick Installation Guide
  • 1x USB-A 2.0 Cable (1.2m)
  • 1x Power supply unit (DC 5V/1A, 1.5m)

Technical Features

  • Extended Range: Up to 150m via CAT 6 or higher cable.
  • Cascading: Extension up to 300m (2x 150m) is possible using a network switch.
  • Power: Transmitter is powered via the host PC; Receiver requires the included DC 5V/1A power supply.
  • Protection: Integrated ESD protection (up to 8kV), overvoltage, and short-circuit protection.
  • Plug & Play: No software or drivers required.

Ports and Interfaces

Transmitter (TX):

Transmitter and Receiver port layout
Transmitter and Receiver port layout
  • RJ45 Port: Connects to the receiver via CAT 6 (or higher) network cable.
  • USB-A Port: Connects to the host PC.

Receiver (RX):

  • Reset Button: Press to restart the device.
  • RJ45 Port: Connects to the transmitter via CAT 6 (or higher) network cable.
  • Power Input: Connects to the DC 5V/1A power adapter.
  • USB-A Ports: Four ports for connecting USB 2.0 devices (mouse, keyboard, printer, flash drive, etc.).

Connection Instructions

Connection diagrams for one-to-one and cascading setups
Connection diagrams for one-to-one and cascading setups
  1. Connect the transmitter to the host PC using the provided USB cable.
  2. Connect the transmitter and receiver using a CAT 6 (or higher) network cable.
  3. Connect your USB devices to the receiver's USB-A ports.
  4. Plug the power supply into the receiver to power on the system.
  5. Note: For distances over 150m, connect a network switch between the transmitter and receiver using two network cables.

Troubleshooting

If you experience issues, consider the following:

  • No response after connecting a USB device: Verify that the network cable conforms to the IEEE-568B standard and is firmly connected. Try resetting the receiver using the reset button or power cycling the unit.
  • Unstable connection with web camera: High-power USB devices may require additional power.

Specifications

  • Maximum Range: 150m (via CAT 6 or higher).
  • Transfer Rate: Up to 480 Mbps (USB 2.0).
  • Operating Temperature: -20°C to 60°C.
  • Housing Material: Metal.
  • Dimensions (per unit): L 7.6 x W 6.0 x H 2.1 cm.
  • Weight: TX 123g, RX 128g.

Practical help

Common problems

No response after connecting USB device

Check if the network cable conforms to IEEE-568B standard and is firmly connected. Reset the receiver by pressing the reset button or power cycling the unit.

Receiver is unstable when connected to an external web camera

High-power USB devices may require additional power supply.

Before use

  • Ensure you have a CAT 6 (or higher) network cable (not included).
  • Verify the host PC is available for connection.
  • Ensure the power supply (DC 5V/1A) is available for the receiver.
  • Check that the installation environment is well-ventilated.

Specs in practice

Maximum range
150m using CAT 6 or higher cable.
Transfer rate
Up to 480 Mbps (USB 2.0 standard).
Power consumption
TX <= 2W, RX <= 2W.

Images and diagrams

  • Transmitter: RJ45 port for network cable, USB-A port for host PC.
  • Receiver: Reset button, RJ45 port, Power input, 4x USB-A ports for peripherals.

Model compatibility

  • Requires CAT 6 or higher network cable.
  • Cascading up to 300m possible using a network switch.

Manual page author

David Miller

Documentation analyst

Organizes user manual content into clear summaries, with attention to model details, product context, and everyday usability.