I'm a little nervous with power connections at the moment after shorting out and damaging the CPU on my pixlite 16. Alan on the 2811dc30 I am using a separate power supply on the 2811dc30 to run the lights to that used by the controller sending the signal to the 2811dc30. Do I have to disconnect the +ve on the line from the controller to the 2811dc30 or are the isolated circuits so it doesn't matter. I seem to remember they are isolated but it has been a while and I figure it pays to check. i guess what I'm asking is does the 2811dc30 board get its power from the controller power supply or the power supply hooked to it that runs the lights. Thanks.