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.Technical specifications for 1747-L40A Manufacturer Rockwell Automation Brand Allen-Bradley Part Number/Catalog No. 1747-L40A Module Type Fixed Controller Series SLC 500 Inputs (24) 120 V AC Outputs 16 AC/DC Relay Memory: 1K Instruction Capacity Communication Port: DH485 Integrated Inputs Twenty-Four (24) 120 Volts AC Integrated Outputs Sixteen (16) AC/DC Relay High-Speed Counter No Line Power 120/240 Volts AC Cable Belden 9463 User Power 24 Volts - 200 milliamps Weight 0.37 pounds (168 grams) Connectors 6-Pin Phoenix Connector Dimensions 5.72 x 1.37 x 5.15 inches Operating Temperature 0-60 Celsius