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      1756-L1M2

      ControlLogix5550 Controller
      In Stock
      Ships by Thursday, November 12
      Fast Shipping Available
      Product image is representative; revision or series may vary. Contact us to request a specific version.

      Product Describe：

      Allen-Bradley 1756-L1M2 is a ControlLogix5550 Controller for the ControlLogix5550 platform. It executes user logic, exchanges chassis I/O data and coordinates communications through installed ControlLogix modules.

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      • 1

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      • 2

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      Technical specifications for 1756-L1M2

      • Manufacturer:
        Allen-Bradley
      • Product Category:
        PLC Systems
      • Spare Part Number:
        1756-L1M2
      • Estimated shipping dimensions:
        3.5x13.8x14.5cm
      • Weight:
        0.4 kg
      • Tariff Code:
        8537101190
      • Counliy of origin:
        USA
      • Data and logic memory:
        1 MB
      • I/O memory:
        150 KB
      • Nonvolatile memory:
        Not supported
      • Backplane current at 5.1 V DC:
        1.05 A
      • Backplane current at 24 V DC:
        20 mA
      • Power dissipation:
        4.8 W
      • Thermal dissipation:
        16.4 BTU/h
      • Operating temperature:
        0-60 C
      • Storage temperature:
        -40-85 C
      • Relative humidity:
        5-95%, noncondensing
      • Operating shock:
        30 g, 11 ms
      • Nonoperating shock:
        50 g, 11 ms
      • Vibration:
        2 g at 10-500 Hz
      • Programming cable:
        1756-CP3 or 1747-CP3
      View as PDF Ask for Quote

      Information

      Overview Manuals Common Applications Product Precautions
      Allen-Bradley 1756-L1M2 is a ControlLogix5550 Controller for the ControlLogix5550 platform. It executes user logic, exchanges chassis I/O data and coordinates communications through installed ControlLogix modules.
      • Owns the chassis control task and scheduled program execution
      • Produces and consumes data through configured communication modules
      • Coordinates local and distributed I/O update paths
      • Reports controller and chassis diagnostic status to engineering tools

      1756-L1M2 operates with 1756 ControlLogix chassis, compatible 1756 power supply, communication modules, RSLogix 5000 project.
      Typical engineered duties include ControlLogix5550 installed-base control, 1756-L1M2 controller migration planning, 1756-L1M2 shutdown replacement, 1756-L1M2 program recovery and validation.

      Important Notice: A 1756-L1M2 replacement requires an engineered match of controller series, firmware, memory, project revision, chassis slot and communication dependencies before the machine is released.

      Apter Power 1756-L1M2 Manuals and Guides

      Important Notice: The first document is an Apter Power 1756-L1M2 model-specific technical reference. The second is a distinct document for installation, configuration or system engineering.

      1756-L1M2 ControlLogix5550 installed-base control
      Owns the chassis control task and scheduled program execution
      1756-L1M2 1756-L1M2 controller migration planning
      Produces and consumes data through configured communication modules
      1756-L1M2 1756-L1M2 shutdown replacement
      Coordinates local and distributed I/O update paths
      1756-L1M2 1756-L1M2 program recovery and validation
      Reports controller and chassis diagnostic status to engineering tools
      Read the applicable Allen-Bradley installation instructions before work. Verify 1756-L1M2 and the installed-system configuration.
      1
      Back up and verify the controller project before removal.
      2
      Confirm chassis slot, controller series and memory option from the nameplate.
      3
      Remove and insert the controller only under the installation conditions stated by Rockwell Automation.
      4
      After download, verify I/O ownership, produced/consumed tags and all communications.
      5
      Commission 1756-L1M2 under controlled conditions and retain the completed functional-test record before release.

      Technical notes

      Use the Rockwell Automation 1756 controller installation sequence for 1756-L1M2. Preserve the validated project and confirm chassis communication before placing outputs under program control.

      FAQ View All FAQ

      • Which chassis accepts 1756-L1M2?
        Install it in a compatible 1756 ControlLogix chassis with the approved power supply and keyed surrounding modules.
      • How should the project be prepared before replacing 1756-L1M2?
        Archive the online project, firmware information, controller properties, I/O tree and communication settings before shutdown.
      • What memory must be compared for 1756-L1M2?
        Confirm the installed catalog number against 1 MB of data/logic memory and 150 KB of I/O memory.
      • How is communication restored after fitting 1756-L1M2?
        Set the approved network path, download the validated project and confirm each configured bridge and I/O connection.
      • What power check applies to 1756-L1M2?
        Include its published backplane demand of 1.05 A at 5.1 V DC and 20 mA at 24 V DC in the chassis loading review.
      • How should 1756-L1M2 be commissioned?
        Verify controller mode, task execution, I/O ownership, inhibited modules, produced/consumed tags and output permissives.
      • Can a different ControlLogix controller replace 1756-L1M2 directly?
        Not without a migration review covering firmware, instructions, communication limits, memory and project conversion.
      • What maintenance records are needed for 1756-L1M2?
        Record the serial/revision data, firmware, project checksum, battery or memory condition, chassis diagnostics and final functional test.
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