The Allen-Bradley 1756-L55M12 is a Logix5555 controller with 750KB of user memory. It supports multi-network communication including EtherNet/IP and ControlNet for high-performance automation.
The Allen-Bradley 1756-L55M12 is a core processing component within the Logix5555 series. This controller executes complex logic and manages high-speed automation tasks. It provides a flexible solution for distributed control systems. The unit integrates easily into standard ControlLogix chassis. Consequently, it remains a reliable choice for legacy system maintenance and upgrades.
This processor features 750 kilobytes of user memory for logic and data storage. Additionally, it reserves 208 kilobytes specifically for I/O memory operations. While this model lacks onboard non-volatile memory, it manages volatile data efficiently during active sessions. Users must utilize a 1756-BA1 lithium battery to preserve data during power loss. This configuration ensures consistent performance for medium-scale industrial programs.
The 1756-L55M12 supports a wide variety of industrial communication protocols. It interfaces with EtherNet/IP, ControlNet, and DeviceNet networks seamlessly. Furthermore, it maintains compatibility with older DH+ and Universal Remote I/O systems. This broad connectivity allows the processor to bridge different hardware generations. It also supports redundant controller architectures through ControlNet media.
Allen-Bradley engineered this controller to withstand rigorous factory conditions. It features the following technical characteristics:
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