Enttec Open DMX USB
Enttec Open DMX USB Lighting Interface User Manual
Model: Open DMX USB (70303)
1. Introduction
The Enttec Open DMX USB is an entry-level DMX interface designed to provide a simple and cost-effective solution for controlling DMX lighting fixtures from a computer. It is ideal for basic DMX control, amateur lighting applications, and troubleshooting DMX setups. This device connects to your computer via USB and provides a 5-pin DMX output.

Image 1.1: The Enttec Open DMX USB device, showcasing its compact design and primary connections.
2. Safety Information
- Do not expose the device to rain or moisture. This unit is intended for indoor use only.
- Do not remove the cover; there are no user-serviceable parts inside.
- Never connect DMX GND to an electrical 'earth' connection.
- For additional flexibility and increased protection, Enttec recommends the use of a DMX splitter.
3. Setup
3.1. System Requirements
- Operating System: Windows XP, Windows 7, Windows 8, Windows 10, macOS.
- Available USB 2.0 port.
- Compatible DMX control software.
3.2. Driver Installation
The Open DMX USB is discovered as a USB Serial Device or virtual COM Port depending on the FTDI driver installed on your system. Drivers are typically installed automatically by your operating system when the device is first connected. If not, please visit the official Enttec website for the latest driver downloads.
3.3. Hardware Connection
- Connect the Enttec Open DMX USB device to an available USB port on your computer using a standard USB Type B cable. The device is designed to be powered from the computer over USB.
- Connect the 5-pin DMX XLR output of the Enttec Open DMX USB to the DMX input of your first DMX lighting fixture or DMX splitter. Ensure all DMX cables are properly terminated.

Image 3.1: Application diagram illustrating the connection flow from computer to DMX fixtures via the Open DMX USB.
4. Operating Instructions
The Enttec Open DMX USB works with a wide range of third-party DMX control software. Once connected and drivers are installed, your software should recognize the device as a DMX output interface.
4.1. Software Compatibility
This device is compatible with various DMX software applications. It provides a single DMX universe (512 channels) of output. The specific features and capabilities will depend on the software used.

Image 4.1: Overview of key features and intended uses of the Open DMX USB.
4.2. Basic Operation
- Launch your preferred DMX control software.
- In the software's settings or preferences, select the Enttec Open DMX USB as your DMX output device.
- Configure your DMX fixtures within the software, assigning them to specific DMX channels.
- Begin sending DMX data from your software to control your lighting fixtures.
The device outputs up to 512 channels, with the exact number of usable channels depending on the software's capabilities.
5. Maintenance
The Enttec Open DMX USB is a robust device designed for reliable operation. It requires minimal maintenance.
- Keep the device clean and free from dust. Use a soft, dry cloth for cleaning.
- Avoid exposing the device to extreme temperatures or humidity.
- Do not attempt to open the casing or modify the device, as this will void the warranty and may cause damage.
6. Troubleshooting
6.1. Device Not Recognized by Computer
- Ensure the USB cable is securely connected to both the device and the computer.
- Try a different USB port on your computer.
- Verify that the necessary FTDI drivers are installed. Check your computer's Device Manager (Windows) or System Information (macOS) for the device. If drivers are missing, download them from the Enttec website.
- Restart your computer.
6.2. No DMX Output / Lights Not Responding
- Confirm that the Enttec Open DMX USB is selected as the output device within your DMX control software.
- Check all DMX cable connections between the interface and your fixtures. Ensure they are 5-pin DMX cables and are not damaged.
- Verify that your DMX fixtures are properly addressed and patched within your software.
- Ensure DMX termination is correctly applied at the end of your DMX chain.
- Test with a different DMX fixture or a DMX tester if available.
- Close and reopen your DMX control software.
7. Specifications

Image 7.1: Detailed specifications from the product datasheet.
| Feature | Detail |
|---|---|
| Item Weight | 4.9 ounces (139 grams) |
| Product Dimensions (L x W x H) | 2.48 x 1.57 x 1.58 inches (63 x 40 x 40 mm) |
| Body Material | Aluminium |
| Color | Blue |
| Connector Type | XLR5 Male (DMX Out), USB Type Micro B |
| Hardware Interface | Micro USB Type B |
| Input Voltage | 5 Volts (DC) via USB |
| Input Current | 300mA |
| Power Draw | 1.5 watts |
| Maximum Output Channels | 1 universe (512 channels) |
| Maximum Output Refresh Rate | 40FPS |
| IP Rating | IP20 |
| Operating System Compatibility | Windows XP, Windows 7, Windows 8, Windows 10, macOS |

Image 7.2: Physical dimensions of the Enttec Open DMX USB.
8. Warranty
The Enttec Open DMX USB comes with a 3-year return-to-base manufacturer warranty. For warranty claims or service, please contact Enttec support or your authorized reseller.
9. Support
For further support, driver downloads, software compatibility information, and frequently asked questions, please visit the official Enttec website:
You may also contact Enttec customer service directly for technical assistance.
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