I have a question about NVR PoE ports. I have been reading the spec on different NVR's with PoE. They all list the Total PoE Wattage output and the max Wattage per port. I don't see any voltage ratings. Some cameras are 12v and some are 24v. Does the NVR automatically supply the correct voltage based on the type of camera that is hooked up. I am planning on installing approx 16 turret cameras which are 12v. I also want to install 2 PTZ's which are 24v. I am looking at the Dahua Pro series NVR5424-24P-4KS2 which has a Max of 220 W PoE power and a max of 25.5 watts per port. According to the specs the Turret cameras use Less than 8.5 watts per camera and the PTZ's use 23W with the IR's on per camera. So 8.5W x16 = 136W and 23W x 2= 46W. That's a total of 182W. I'm guessing it will work. Am I correct?