Product Details
Overview
The 1756-L55M12 (1756-L55M12) is a high-performance Logix5555 processor designed for the Allen-Bradley ControlLogix platform. This module is engineered to handle complex control engine requirements, providing a multitasking operating environment that supports multiple programming languages including Ladder Logic, Structured Text, and Function Block Diagrams. With 750 Kilobytes of available user memory, it offers a reliable solution for medium-scale industrial applications requiring precise I/O management and fast logic execution.
Technical Specifications and Performance Data
The 1756-L55M12 (1756-L55M12) integrates directly into any slot of a ControlLogix chassis, leveraging the high-speed backplane for data distribution and peer-to-peer communication.
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Memory Configuration: 750 Kilobytes of User RAM (Non-volatile storage available via optional CompactFlash on newer Logix series, but this legacy unit utilizes battery-backed RAM).
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I/O Capacity: Supports a maximum of 128,000 total I/O points.
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Analog Scaling: Capable of managing 4,000 Analog Inputs and 2,000 Analog Outputs.
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Logic Execution Time: Typical program scan time of 0.08 milliseconds (specific to simple logic rungs).
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Current Draw: 1.23 Amps at 5.1V DC; 14 milliamps at 24V DC.
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Thermal Dissipation: Approximately 19.1 BTU per hour.
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Communication Options: Compatible with EtherNet/IP, ControlNet, DeviceNet, and Data Highway Plus through respective communication modules.
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Battery Backup: Compatible with 1756-BA1 or the 1756-BATM externally mounted battery assembly for extended program retention.
Environmental and Physical Standards
The hardware is designed for continuous operation in industrial environments, adhering to strict vibration and temperature tolerances.
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Operational Temperature: 0 to 60 degrees Celsius (32 to 140 degrees Fahrenheit).
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Storage Temperature: -40 to 85 degrees Celsius (-40 to 185 degrees Fahrenheit).
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Humidity: 5% to 95% non-condensing.
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Vibration Resistance: 2.0g @ 10 to 500 Hertz.
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Weight: 0.37 kg (0.81 lbs).
Common Technical Inquiries
How is the user memory partitioned in the 1756-L55M12?The 750KB of memory is shared between data storage and the application code. Unlike legacy PLC-5 systems, the ControlLogix platform allocates memory dynamically based on the tag-based database structure.
Which programming software is required for this module?The 1756-L55M12 (1756-L55M12) is typically programmed using RSLogix 5000 software. The firmware revision of the processor must match the major version of the software project.
What is the purpose of the 1756-BATM?While the 1756-BA1 is a standard internal battery, the 1756-BATM is an optional battery module used for applications where the controller is powered down for long periods, providing significantly higher mAh capacity to preserve memory.
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
Implementing FIFO and LIFO Data Sequencing in PLC Programming
Data management serves as a cornerstone of modern industrial automation. Whether tracking materials on a conveyor or managing batch sequences in a process, engineers frequently rely on sequential logic. Two primary structures—First-In-First-Out (FIFO) and Last-In-First-Out (LIFO)—form the bedrock of this data handling. Mastering these blocks allows programmers to optimize complex machine operations efficiently.
Evolving SCADA System Architectures in Industrial Automation
A robust Supervisory Control and Data Acquisition (SCADA) system serves as the heartbeat of modern industrial operations. Understanding SCADA system architecture is vital for engineers designing efficient control systems. These architectures have evolved from isolated, monolithic structures to highly interconnected, networked ecosystems. Choosing the right design requires balancing data visibility, processing power, and long-term scalability requirements.
Choosing the Right Controller: PLC vs. Motion Controller in Industrial Automation
Selecting the optimal control architecture is a foundational decision in industrial automation. Engineers must frequently choose between a Programmable Logic Controller (PLC) and a dedicated Motion Controller. While both systems manage machinery, their underlying design philosophies differ significantly, impacting performance, scalability, and system integration.