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
Why 24V DC Power Supplies Standardize Modern Industrial Automation
Industrial control cabinets worldwide rely on 24V DC as the universal power standard for field instrumentation, sensors, and controllers. Walk into any manufacturing plant, and you will find PLCs, human-machine interfaces (HMIs), and smart actuators running on extra-low voltage DC. Standardizing on 24V DC enhances operational safety, lowers cabinet footprint, and maintains steady control performance across factory networks.
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.
Mastering Modern Industrial Joystick Controls in Heavy Automation
Industrial joysticks play a pivotal role in human-machine interaction across heavy material handling and mobile hydraulics. These tactile controllers translate complex operator movements into precise electrical signals for PLCs, motion controllers, and DCS networks. Consequently, selecting and installing the right joystick architecture ensures operator safety, reduces fatigue, and optimizes equipment performance.