My sensor is triggered but no voltage is coming out of the load leads.
You have correctly wired the DS2 to your power source as evidenced by the fact that the sensor powers on but your mat has not been correctly wired to the DS.
Check to make sure that the black wire from the mat’s power lead is connected to the remaining yellow wire of the DS (the other yellow wire of the DS is going to the power source).
See installation instructions for details.
REMOVE ALL SENSOR AND CONTROLLED POWER BEFORE OPENING THE FRONT COVER!
ALWAYS CHECK WITH A LICENSED ELECTRICIAN AND OBSERVE ALL LOCAL CODES.