JDW Series for Dumbwaiters JDW SERIES FOR DUMWAITERS The NON-PROPRIETARY controllers of the JDW series are designed to control traction-machine powered dumbwaiters. They are designed using logic relay circuits or industrial programmable logic controllers, so they are easy to maintain and to troubleshoot. Download brochure Download form CHARACTERISTICS Single or three-phase supply from 208 to 600 volts; Fixed or motorized came sequence; Relay logic circuit without electronic cards. MODELS JDW-1000 Logic relay circuit controller at 120 VAC used for basic dumbwaiters. JDW-2000 PLC-based controller at 120 VAC used with custom-order dumbwaiters. JDW-3000 PLC-based controller at 120 VAC equipped with an AC drive used for dumbwaiters requiring controlled accelerations and decelerations.