> 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="/files/EQa0XDZRqPFK7uRs4G4w" 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:

![](/files/LsAb9mhPq9Ysd41UgB71)