---
title: "Switch on"
slug: "switching-on"
updated: 2025-03-17T10:32:57Z
published: 2025-03-17T10:32:57Z
canonical: "docs-linescan.alliedvision.com/switching-on"
---

> ## Documentation Index
> Fetch the complete documentation index at: https://docs-linescan.alliedvision.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Switch on

| ![electricity](https://cdn.document360.io/eca58697-9c2f-461e-9f0a-e6205b74b693/Images/Documentation/hazard%20warning%20sign-optical%20radiation.png) | **![general warning](https://cdn.document360.io/eca58697-9c2f-461e-9f0a-e6205b74b693/Images/Documentation/general%20warning.svg)DANGER** |
| --- | --- |
| **Optical radiation causes serious injuries to eyes and skin** |
| Do not look into the light. Wear opaque eye protection. Install a protective cover if possible. |

| ![hot surface](https://cdn.document360.io/eca58697-9c2f-461e-9f0a-e6205b74b693/Images/Documentation/hot%20surface.png) | **![general warning](https://cdn.document360.io/eca58697-9c2f-461e-9f0a-e6205b74b693/Images/Documentation/general%20warning(3).png)WARNING** |
| --- | --- |
| **The device can heat up to 75 °C.** |
| Do not touch the hot surface. Let the device cool down before carrying out any work on it. |

Switch on the power supply of the XLC4 control unit.

The status LEDs display the stored device ID during power-up.

The input voltage and the values of the temperature sensors are checked.

The XLC4 control unit establishes a connection to the Corona modules via the 4 output channels. The red LED is on.

After successful power-up the green LED is flashing every 5 seconds. Otherwise the red LED is on.

A identification string is sent via the serial interface. The string contains the type of the control unit and the loaded firmware version and release.