> For the complete documentation index, see [llms.txt](https://docs.jcore.io/clarity-gateway/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.jcore.io/clarity-gateway/installation/readme/mounting-and-wiring/power-and-ground-connections.md).

# Power and Ground Connections

The Iron Pi requires a 12 to 24 volt DC power supply capable of delivering at least 1 amp to the Iron Pi. Connect the power supply's positive terminal to the Iron Pi's `+12-24V` terminal, and the power supply's negative terminal to the Iron Pi's `GND` terminal. When using a typical AC/DC power supply with a floating DC output, connect the power supply negative output to ground.

<figure><img src="https://1557066017-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FSPy42kVbNL57hubF20gF%2Fuploads%2Fgit-blob-e72d54322185894ce46e194a665d51686af8e7e1%2F01%20power%20schematic.png?alt=media" alt=""><figcaption><p>Typical Power and Ground Connections</p></figcaption></figure>

{% hint style="danger" %}
To ensure equipment and operator safety, connect a properly sized fuse between the AC power entrance and the AC/DC power supply, bond the enclosure or backplate to the ground wire, and connect the Iron Pi's CHAS terminal to chassis ground.
{% endhint %}

When you apply power to the Iron Pi, the Power/CPU light should immediately turn green, and then blink orange to indicate disk activity:

![](https://1557066017-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FSPy42kVbNL57hubF20gF%2Fuploads%2Fgit-blob-ec4226b84786ee913ce5a8bc9f6b8ecaabbd3c5d%2FPower%20Connected.jpg?alt=media)