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 %}
