The Allen-Bradley 1747-L40A is a versatile fixed hardware controller that forms part of the SLC 500 series, designed for efficiency and reliability in industrial automation. Featuring 24 discrete 120V AC inputs and 16 AC/DC relay outputs, this compact PLC boasts robust processing capabilities with a 1K instruction capacity and a scan speed of 8 milliseconds per 1K, powered by a capacitor-backed RAM with optional EEPROM and UVPROM memory backup. Operating efficiently across a wide voltage range from 85V to 265V AC, the 1747-L40A ensures seamless performance with its program scan hold-up time of up to 700 milliseconds and supports expansion with two additional modules via the 1746-A2 chassis, making it an adaptable solution for varying operational demands.
