CompactLogix Controllers

The Allen‑Bradley 1769‑L33ER is a CompactLogix™ 5370 L3 programmable automation controller designed for medium‑sized machines and control systems requiring higher performance, increased memory capacity, and scalable Ethernet connectivity. It is well suited for applications that need reliable control, distributed I/O, and seamless integration into EtherNet/IP networks.
This controller features 2 MB of user memory, providing ample capacity for complex logic, device communication, and data handling. Unlike packaged L1/L2 controllers, the 1769‑L33ER is a modular controller, allowing flexibility in system design when paired with appropriate power supplies and I/O modules.
The 1769‑L33ER includes dual EtherNet/IP ports, enabling high‑speed communication with HMIs, drives, distributed I/O, and other controllers while supporting linear and star network topologies. Its Ethernet capabilities make it ideal for modern, network‑centric automation architectures.
Supporting a wide range of 1769 Compact I/O modules, the controller allows systems to scale easily as application requirements grow. It is fully programmable using Studio 5000 Logix Designer, ensuring seamless integration with Rockwell Automation’s Logix platform.
Overall, the 1769‑L33ER delivers a strong balance of processing power, memory, and Ethernet connectivity, making it an excellent choice for machine builders and system integrators seeking a reliable controller for flexible, expandable industrial automation systems.

The Allen‑Bradley 1769‑L18ERM‑BB1BK is a CompactLogix™ 5370 L1 packaged automation controller designed for compact machines that require high performance, reliable Ethernet communication, and integrated motion control in a single, space‑saving unit. With embedded I/O and advanced networking capabilities, this controller helps reduce system complexity while delivering dependable machine control.
This model features 512 KB user memory, allowing it to handle demanding control applications, and supports up to 8 local expansion I/O modules for future scalability. The controller includes 16 embedded digital inputs (sinking) and 16 embedded digital outputs (sourcing), making it ideal for standalone machines that need built‑in I/O without additional hardware.
Equipped with dual EtherNet/IP ports, the 1769‑L18ERM‑BB1BK supports Device Level Ring (DLR) topologies for network redundancy, improving system availability and minimizing downtime. It also supports integrated motion control for up to 2 axes over EtherNet/IP, making it well suited for applications such as conveyors, indexing systems, packaging machines, and basic motion control tasks.
Operating on 24 VDC, the controller supports SD card–based nonvolatile memory for program backup and easy firmware management. The “BK” suffix indicates a factory‑applied conformal coating, providing added protection against moisture, dust, and corrosive contaminants—ideal for use in harsh or industrial environments.