JRD Series for Private Residence JRD SERIES FOR PRIVATE RESIDENCE The NON-PROPRIETARY controllers of the JRD series were designed to control hydraulic residential elevators. They are designed using relay logic or industrial PLCs which makes repairs and maintenance easy. Download brochure Download form CHARACTERISTICS Single or three phase supply from 208 volts to 600 volts; Emergency lowering by battery or UPS; Fixed or motorized cam sequence; Relay logic circuit without electronic cards. MODELS JRD-1000 Logic relay circuit controller at 120VAC and emergency lowering by a 12VDC battery. JRD-1001 Logic relay circuit controller at 120VAC and emergency lowering by UPS at 120VAC. JRD-2000 PLC-based controller at 120VAC and lowering by a 12VDC battery.