Product Details
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
| Feature | Specification Details |
| Manufacturer | Allen Bradley / Rockwell Automation |
| Part Number | 1756-L55M16 |
| User Memory (RAM) | 7.5 MB |
| Maximum Total I/O | 128,000 |
| Max Analog I/O | 4,000 Input / 2,000 Output |
| Program Scan Time | 0.08 ms |
| Backplane Current (5V DC) | 1.23 A |
| Backplane Current (24V DC) | 14 mA |
| Operating Temperature | 0–60 °C (32–140 °F) |
| Vibration Tolerance | 10–500 Hz |
| Condition | 100% Brand New Original |
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.
Additional Information
- 100% Genuine Parts: All products are original and authentic, ensuring reliable industrial performance.
- 30-Day Refund Guarantee: Return any in-stock item within 30 days in original, unopened packaging for a full refund (excluding shipping and fees).
- 12-Month Warranty: Covers defects in materials or workmanship; excludes misuse, normal wear, or unauthorized modifications.
- Worldwide Shipping: We ship via USPS, UPS, FedEx, and DHL. Delivery times vary by country and may be subject to customs or import fees.
- Support & Contact: Technical and warranty assistance is available anytime. Contact us here: Contact.
- Purchase Guidance: Check product specifications and compatibility carefully before ordering to ensure proper application.
Tech & Buying Guide
Navigating Industrial Automation Failures: Types, Causes, and Mitigation Strategies
Modern manufacturing relies heavily on automated control systems to maximize throughput and maintain product quality. However, unplanned downtime in industrial automation can cost facility operators thousands of dollars per hour. Understanding how programmable logic controllers (PLCs), distributed control systems (DCS), and field instrumentation fail empowers engineering teams to implement robust preventive maintenance strategies.
Essential Motion Control Commands: A Practical Guide for Engineers
Automation engineers often rely on precise position and speed control to drive modern factory machinery. Modern industrial systems, such as Programmable Logic Controllers (PLCs) and Distributed Control Systems (DCS), depend heavily on standardized motion instructions. Mastering these commands ensures operational safety, protects mechanical components, and optimizes cycle times across production lines.
The Role of Intrinsic Safety Barriers in PLC and DCS Architectures
Implementing robust protection in hazardous industrial environments represents a fundamental safety requirement in factory automation. Process facilities often handle volatile gases, dusts, and chemical agents that pose significant combustion risks. Consequently, control system engineers must deploy energy-limiting interfaces to isolate safe-area control cabinets from hazardous-area field instrumentation. This article examines the function, selection, and electrical principles of intrinsic safety barriers within modern PLC and DCS networks.