# Digital & Analog Input Functions

For instance, the input function can log status information from devices, machines, and sensors to directly determine and monitor switch and key states. You can record the data determined from the input functions, which can be used to create triggers for starting and stopping logging.

For a step-by-step guide, [<mark style="color:blue;">click</mark>](https://docs.influxtechnology.com/configuration-software-s/rexdesk-rexgen-series-configuration-software/rexdesk-manual/quick-start-guide/preparation-of-configuration/logging-digital-channels) here.

How to [<mark style="color:blue;">configure analog and digital channels</mark>](https://youtu.be/ksjbOI8hGXU?si=itNxoDHbLOjw3vcS) using ReXdesk.

{% hint style="danger" %}
Warning:

* Signal inputs (CAN, analogue or digital) should not exceed ±28 V.
* For stable operation, ensure all sensors and inputs share the same ground as the unit's power supply.
  {% endhint %}


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