You can not limit the voltage to the fan in firmware. Limiting the voltage would require a voltage divider, voltage regulator, or some other type solution. Which can be created with two resistors of the appropriate voltage rating.
Far easier to purchase the appropriate 24V fan.
You can not limit the voltage to the fan in firmware. Limiting the voltage would require a voltage divider, voltage regulator, or some other type solution. Which can be created with two resistors of the appropriate voltage rating.
Far easier to purchase the appropriate 24V fan.