# FlexSystem supervision

The AC/24 VDC power supply voltage supervision measures the 3-phase voltages.

The FlexCarrier network contains:

- Temperature sensors

- Fan controllers

- Voltage monitors

- Drive network

The device in the first slot is responsible for:

- Collecting all the information from all local networks of the FlexDrives

- Controlling the fans (optional).

Example

If a temperature sensor registers a temperature that is too high, a signal is sent through the supervision network to increase the fan speed.