Allen Bradley 1756-L55M16 ControlLogix 5555 Logix5555 Processor Module

Product Overview

The Allen Bradley 1756-L55M16 serves as a core processing engine within the ControlLogix 5555 platform. This high-capacity CPU manages complex control algorithms and extensive I/O configurations for large-scale industrial applications. By utilizing 7.5 MB of dedicated RAM, this processor executes sophisticated logic sequences with a rapid program scan time of just 0.08 milliseconds. It anchors the 1756 chassis system, providing the computational power necessary to synchronize motion, discrete, and process control tasks across a unified backplane.

Technical Specifications

Engineering Advantages

• Ultra-Fast Execution: The 0.08ms scan time significantly reduces command latency. This rapid processing ensures precise timing for high-speed packaging, bottling, and assembly lines where millisecond deviations result in production errors.

• Massive I/O Scalability: Supporting up to 128,000 digital I/O points, the 1756-L55M16 centralizes control for entire plant sectors. This density minimizes the number of processors required, reducing overall system architecture costs.

• Robust Memory Capacity: The 7.5 MB RAM provides ample space for extensive data logging and complex tag structures. Engineers can store comprehensive diagnostic routines directly on the controller, facilitating faster on-site troubleshooting.

• Thermal Resilience: The module operates reliably up to 60 °C. This allows for installation in high-density control cabinets without requiring specialized localized cooling systems, provided the enclosure maintains standard industrial ventilation.

• Chassis-Based Versatility: The 1756-L55M16 slides into any standard ControlLogix chassis slot. This modular design allows for hot-swapping and easy hardware upgrades, ensuring the system evolves alongside changing production requirements.

FAQs

• Is this 1756-L55M16 processor 100% Brand New?

  Yes. We supply this unit in 100% Brand New, original factory condition. It arrives in genuine Allen Bradley packaging to ensure maximum hardware integrity and longevity.

• Which battery should I use for memory retention?

  This processor requires either a 1756-BA1 or a 1756-BATM battery assembly. The battery preserves the stored program and tag data during power cycles. We recommend replacing the battery during scheduled annual maintenance to prevent data loss.

• Can the 1756-L55M16 handle analog intensive applications?

  Absolutely. It manages up to 4,000 analog inputs and 2,000 analog outputs. Its high computational speed ensures smooth PID loop control and accurate scaling for pressure, temperature, and flow sensors.

• Does this module support firmware updates?

  Yes. You can flash the firmware using ControlFlash software to align the processor with your specific Studio 5000 or RSLogix 5000 software version. Always check the revision compatibility before commissioning.