Allen-Bradley 1756-L55M16 ControlLogix Logix5555 Controller

Description

The Allen-Bradley 1756-L55M16 ControlLogix Logix5555 Controller is a high-performance programmable logic controller (PLC) belonging to the Logix5000 series, designed for industrial automation control applications. It features 7.5 MB of data and logic memory and 208 KB of I/O memory, providing ample space for complex application code, data storage, and I/O operations. Equipped with dual CPUs—one Logix CPU and one backplane CPU—it enables optimized resource allocation: the Logix CPU executes application code and handles messaging tasks, while the backplane CPU manages data transmission and reception across the backplane and communicates directly with I/O devices.

For connectivity, the controller supports a serial port connection to workstations or other controllers via the 1756-CP3 serial cable, and is compatible with multiple industrial networks including EtherNet/IP, ControlNet, and DeviceNet. It can also broadcast and receive system-shared tags over EtherNet/IP or ControlNet networks. Key features include a modular design for flexible configuration and scalable I/O channel expansion, plus high reliability with anti-interference capabilities and long-term stability, making it suitable for harsh industrial environments. Configuration and debugging are supported via dedicated Rockwell Automation software, and it integrates seamlessly with other ControlLogix components to support sequential, process, drive, and motion control applications.