When using multiple strobes and horns add a power Notification Appliance Circuit (NAC) power supply to provide adequate current to drive the output devices.
AL300ULXR - Single Output Power Supply/Charger. 12/24VDC @ 2.5A Class 2. Red Encl & Xfmr.
US $164.42
AL400ULXR - Single Output Power Supply/Charger. 12VDC @ 4A or 24VDC @ 3A. Red Encl. & Xfmr
US $205.43
AL600ULADA - NAC Power Extender. 12/24VDC @ 6.5A. Class 2.
US $295.10
AL1002ULADA - NAC Power Extender. 24VDC @ 10A. Class 2.