> For the complete documentation index, see [llms.txt](https://docs.ceruleansonar.com/c/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.ceruleansonar.com/c/dvl-75/electrical-drawings/using-external-power-with-serial-cable.md).

# Using External Power with Serial Cable

{% hint style="info" %}
WARNING: When using the serial port, the USB-to-serial converter power may be insufficient to power the DVL. Be sure to connect the power ground to the signal ground when wiring your system! Failure to do so will fry the serial interface circuitry!
{% endhint %}

![](/files/EIfqSxUyc1lXXT7GZrFT)