1756-L71K | Allen Bradley | ControlLogix Conformal Coated Processor Module

Product Overview

The Allen Bradley 1756-L71K serves as a high-performance central processing unit within the ControlLogix 5570 family. This module executes complex control laws, manages high-speed I/O communication, and handles motion control tasks across large-scale industrial architectures. The "K" designation signifies a Conformal Coated version, specifically treated to resist moisture, fungus, and corrosive chemical vapors. We supply this processor as 100% Brand New and Factory Original, ensuring peak computational reliability for your most critical automation assets.

Technical Specifications

The 1756-L71K integrates high-density memory and low-power processing into a single-slot ControlLogix chassis module:

Engineering Advantages

• Corrosive Environment Resilience: The specialized conformal coating protects the internal PCB and surface-mount components from environmental contaminants. This makes the 1756-L71K the ideal choice for wastewater treatment plants, oil and gas refineries, and chemical processing facilities where standard electronics fail due to atmospheric corrosion.

• High-Speed Data Throughput: This processor utilizes the high-performance ControlLogix backplane to manage up to 128,000 total I/O points. It accelerates scan times and improves system responsiveness for synchronized motion and discrete high-speed control loops.

• Efficient Energy Management: The module dissipates only 2.5 Watts of power during peak operation. This low thermal profile reduces the heat load within the control enclosure, allowing for denser module configurations without necessitating high-capacity active cooling systems.

• Integrated Energy Storage: The 1756-L71K eliminates the need for lithium batteries. It employs internal energy storage technology to facilitate the transfer of volatile memory to onboard non-volatile storage during power-loss events, simplifying long-term maintenance and compliance with transport regulations.

• Robust Signal Integrity: The 30V continuous isolation barrier shields the processor logic from electrical noise and ground loops. This ensures the CPU maintains consistent execution of the control program even in electrically noisy environments near large motor drives.

FAQs

• Is this 1756-L71K unit 100% Brand New?

  Yes. We guarantee this processor is 100% Brand New and ships in its original factory-sealed anti-static packaging. Every unit carries a unique serial number and has never been installed or programmed.

• Can I use the 1756-L71K in a standard (non-K) chassis?

  Yes. The 1756-L71K fits into any standard 1756 ControlLogix chassis. However, to maximize the protective benefits of the conformal coating, we recommend installing it in a conformal coated "K" chassis (e.g., 1756-A10K).

• Does this processor require a battery for program backup?

  No. The 5570 series processors, including the 1756-L71K, use a built-in capacitor-based energy storage module. This module provides enough power to write the program to internal flash memory if the system loses power, removing the maintenance requirement for periodic battery replacement.

• What software is required to program this module?

  You must use Studio 5000 Logix Designer software. Ensure your software version supports the 1756-L71K hardware profile and the specific firmware revision intended for your application.