Spec Sheet Preview: The Alpha Communications® PWR2410A Power Supply is used with the AlphaRefuge™ 2100 Series Area of Refuge system. The PWR2410A can provide power for the RCB2100 series Refuge Call Boxes, which operate on 24VDC 'remote' power. It is not needed when the RCB2100 series Refuge Call Boxes are powered by 'direct' 120VAC power. Only one (1) PWR2410A is needed per system.