Allen-Bradley | SLC500 System | 1747-L524 SLC 5/02 ControllerSpecifications of Allen Bradley 1747 L524 SLC 5 02 Controller: Product Type: SLC 5 02 Processor 4K Memory Program Memory (Words): 4K I O Capacity: 4096 discrete Remote I O Capacity: Processor memory and chassis power limit up to 4096 inputs and 4096 outputs Chassis Slots, Max: 3 Chassis 30 Slots of I O Memory and Backup: Standard RAM: Capacitor 2 weeks; optional lithium battery 5 years; Lithium battery 2 years; Capacitor 30 minutes minimum Memory