# EMS Controller: installation

When installing the controller, it can be clipped onto a DIN rail and connected in the following way.

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

| 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.

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.

<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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