Yes it works, and is a clever idea that provides a major safety feature for the cost of a bit of wire, 2 connectors, and 1 digital output bit. I think it holds the contact pair low for 1-second. Be careful about how you set up the Alarm trigger. When I got mine, while testing, I inadvertently set the Alarm trigger to a condition that normally occurred when AQS service and GUI start up. The result was every time AQS started, the alarm would trigger and the computer would shut down. Oops.