> For the complete documentation index, see [llms.txt](https://docs.voltmasters.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.voltmasters.io/getting-started/ems-controller-installation.md).

# EMS Controller: installation

When installing the controller, clip it onto a DIN rail and connect it as shown below.

<figure><img src="/files/X449DmvwMbzuTGxosyLu" alt="" width="273"><figcaption></figcaption></figure>

### Power and network connections

| Color         | Location | Type          |
| ------------- | -------- | ------------- |
| Orange        | Left     | +24V          |
| White         | Middle   | −24V          |
| Green-Yellow  | Right    | Ground ⏚      |
| Network cable | Top      | Network cable |

You can use a 24-volt power supply or look for a compatible power cable.

{% hint style="info" %}
To communicate with the devices, the controller must be connected to the internet. All devices to be paired must also be connected to the same network.
{% endhint %}

<figure><img src="/files/0yP8QdCB66dUYjDidlNY" alt="" width="174"><figcaption></figcaption></figure>

[Hardware datasheet](https://revolutionpi.com/fileadmin/downloads/datasheets/Technical_Datasheet_RevPi-Core-all.pdf)


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