Hi,
I currently have the VMB6IN hooked onto my alarm system. When motion is detected approaching the staircase the staircase lights automatically turn on as the input on the VMB6IN triggers a relay on the VMB4PD. Also when the alarm is activated certain lights are also switched on in the same manner as previous point.
The VMB6IN should be used for contact closures to trigger other components as setup with the software supplied. For your questions:
No
When common and one of the other outputs are connected, they can trigger action on another component, ie switch