The Allen-Bradley 1756-L72 is a ControlLogix Processor Module by Rockwell Automation, providing 4MB of user memory and supporting up to 128,000 digital I/O. It features a USB port for programming and configuration, and integrates seamlessly with RSLogix 5000 software for diverse application needs. Manufacturer Rockwell Automation Brand Allen-Bradley Part Number/Catalog No. 1756-L72 Series ControlLogix I-O Memory 0.98 MB Module Type Processor Module User Memory 4MB Nonvolatile Memory 1 GB (1784-SD1 ships with every controller) 2 GB (1784-SD2) Maximum I-O 128,000 Communication 1 port USB USB Port Communication Programming, configuration, firmware update, and on-line edits only Maximum Analog I-O 4,000 Maximum Digital I-O 128,000 Current Draw (1.2 Volts DC) 5 milliamps Current Draw (5.1 Volts) 800 milliamps Power Dissipation 2.5 Watts Backplane Current (1.2 Volts DC) 5 mA Thermal Dissipation 8.5 BTU per hour Backplane Current (5.1 Volts DC) 800 mA Isolation Voltage 30 Volts Continuous Weight 0.25 kg (0.55 lb) Enclosure None Relative Humidity 5-95 percent Operating shock 30G Programming Software RSLogix 5000 UPC 10612598876027 Redundancy Full Support UNSPSC 32151705 Programming Languages Relay ladderStructured textFunction blockSFC"