Allen-Bradley 1756-L1M2 ControlLogix 5550 Processor Module

Product Overview

The Allen-Bradley 1756-L1M2 is a processor module from the ControlLogix 5550 series. It offers reliable control for complex automation tasks. This module provides 1 MB of user memory. It supports multiple network protocols for flexible integration. The 1756-L1M2 is an open-style module for cabinet installation. Its design ensures high performance in harsh industrial environments. This processor is ideal for medium to large control systems. It delivers consistent and precise logic execution. The module uses a lithium battery for memory backup. Engineers trust this model for its durability and efficiency.

Application Scenarios

This processor works well in manufacturing plants. It controls assembly lines and material handling systems. The 1756-L1M2 manages batch processing in chemical facilities. It also handles packaging machinery in food and beverage industries. Its network support suits remote I/O applications. The module integrates with DeviceNet and ControlNet networks. It is common in automotive and automotive parts production. The processor also runs water treatment and wastewater systems. It powers conveyor systems in warehouses and distribution centers. The 1756-L1M2 is a top choice for discrete and process control.

Technical Specifications

The module has 1 MB of expansion memory. It uses 1 MB of user memory without nonvolatile storage. The average power dissipation is 4.8 W. Thermal dissipation reaches 16.4 BTU per hour. It draws 1.05 A at 5V DC on the backplane. It draws 0.02 A at 24V DC. The operating temperature range is 0 to 60 °C. Storage temperature spans -40 to 85 °C. It handles 5 to 95% non-condensing humidity. The module withstands 2 G vibration at 10 to 500 Hz. It survives 30 G operating shock for 11 ms. The isolated voltage is 30 Volts continuous. It withstands 500 Volts for 60 seconds. The emissions classification is Group 1, Class A. The 1756-LM2 supports DeviceNet, ControlNet, and Universal Remote I/O.

Installation & Maintenance Guide

Install the module in a ControlLogix chassis. Use the 1756-CP3 or 1747-CP3 programming cable. Connect the battery (1756-BA1) for memory backup. Ensure proper grounding to avoid electrical noise. Do not exceed the maximum backplane current limits. Keep the enclosure clean and free of debris. Check the operating temperature regularly. Replace the battery every few years as needed. Use ESD precautions during handling. The module is hot-swappable in most chassis. Follow the manual for detailed wiring instructions. Use only approved cables and accessories.

Packing List

1 x Allen-Bradley 1756-L1M2 processor module. 1 x product documentation. 1 x battery (1756-BA1). No other accessories are included. The module ships in an anti-static bag.