CNC Machines Laser Upgrade InstructionsAcro System & BlackBox Set-Up Manual for 2W and 6W Laser Head 4. Setting up the Power Supply. For the next part, please plug in the 24V Power Supply Unit (PSU) on the opposite side of the BlackBox. The PSU will also supply power to the PLH3D laser head. Copyright © 2021 by Tomorrow's System Sp. z o.o. All Rights Reserved.