1756-L72 Allen-Bradley Logix5572 Central Processing Unit Module

Product Description

The Allen-Bradley 1756-L72 acts as a high-performance central processing hub for complex ControlLogix automation architectures. This programmable logic controller executes multi-discipline control strategies, including advanced motion synchronization and sequential operations.

Technical Profile and Specifications

• Product Generation: ControlLogix 5570 Platform
• Processor Model Number: Logix5572
• Onboard User Memory: 4 Megabytes
• Dedicated I/O Memory: 0.98 Megabytes
• Maximum Digital I/O Capacity: 128,000 discrete points
• Maximum Analog I/O Capacity: 4,000 points
• Chassis Compatibility: Standard 1756 ControlLogix Chassis Slots
• Integrated Hardware Port: Local USB 2.0 programming interface
• Supported Fieldbus Protocols: EtherNet/IP, ControlNet, DeviceNet, SynchLink
• Energy Storage Technology: Capacitor-based non-volatile memory backup
• Thermal Performance Limits: 0 to 60 degrees Celsius (32 to 140 degrees Fahrenheit)
• Net Module Mass: 0.25 kg (0.55 lbs)
• Customs Tariff HS Code: 8537101190

Processing Power and Advanced Capabilities

This advanced control unit drives sophisticated machinery setups by utilizing an optimized double-processing engine architecture. Specifically, the CPU executes ladder logic, structured text, and function block diagrams with minimal instruction latency. Because it handles multiple programming languages natively, engineers can deploy the processor in integrated motion-over-EtherNet/IP applications. Furthermore, the architecture supports up to 100 axes of synchronized motion control simultaneously.

The module eliminates the traditional lithium battery backup system by integrating an onboard energy storage capacitor module instead. This capacitor provides enough residual power during a blackout to transfer data files to secure non-volatile memory. Consequently, plant managers avoid the costs of routine battery replacement cycles and minimize data corruption risks.

Network Integration and System Resilience

The processor manages high-density network communication loops through multiple companion interface modules across the backplane structure. The controller updates remote input assemblies and fields instrumentation data concurrently via standard EtherNet/IP topologies. Meanwhile, the localized USB port provides a convenient point-to-point interface for field engineers to perform local data logging and software updates.

The physical design easily withstands severe thermal loading and electrical noise common to heavy manufacturing plants. Additionally, the unit slide-locks into any slot of a standard 1756 chassis to simplify system layouts. Industries routinely utilize this hardware in automotive manufacturing, power generation facilities, and large-scale water treatment infrastructure.