> For the complete documentation index, see [llms.txt](https://drotek.gitbook.io/pixhawk-3-pro/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://drotek.gitbook.io/pixhawk-3-pro/software/qgroundcontrol/safety-switch.md).

# safety switch

The Pixhawk is sold without the switch safety. To arm your autopilot without it, you must activate the `Circuit breaker` function in QGroundControl. Setting this parameter to `22027` will disable IO safety.

{% hint style="warning" %}
Enabling this circuit breaker is at own risk. The other solution is to connect your own safety switch to the All-in-One port of your Pixhawk.
{% endhint %}

![safety switch](https://1542051135-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-LU5o-Ac6o-JIpVeYPKs%2F-LU5o4ARTNP3Gyxb_LZT%2F-LU5o4cvCqtE1YjfBh6z%2Farm_switch.png?generation=1545228806357072\&alt=media)