IPD has an Auto Power Down (APD) feature but it is defeated by default. It can be configured to be active and then selectable on how long without signal it should run before APD by following the below steps. Please note thresholds are not configurable. 

1.    Open the IntelliDrive application.
2.    Enter the Mixer view of a device by hitting the Mixer button from the global view.
3.    When in mixer view, on the top menu bar Hardware->Configure->Auto Power Down.
4.    Activates and sets the time delay before device will go into standby mode when no signal is present at the input. A value of 0 disables Auto Power Down. Threshold for “no signal” is -48 dBu.