Getting somewhere now! The laser turret is controlled through the signal generator switch on the wall. The push beam turret turns on the switch, which turns on the laser turret, and starts the signal countdown. When that hits zero, the laser turret is turned off and the signal generator goes into cooldown.
It has other modes too, where the number of times the signal can fire is limited, or where it can be turned off by a beam as well as on.
