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Allen Bradley 1756-L72 Processor 4Mb Controller Module

Allen Bradley 1756-L72 Processor 4Mb Controller Module

Item NO.: 1756-L72
Inquiry

Warranty: 1 year 


Condition : brand new in factory sealed box


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Detail

  • Product NameAllen Bradley 1756-L72 Processor 4Mb Controller Module
  • Item NO.1756-L72
  • Weight1.0000 kg = 2.2046 lb = 35.2740 oz
  • CategoryPLC
  • BrandAllen-Bradley
  • Creation Time2024-12-26
CONTROLLOGIX 5570 | 4 MB USER MEMORY | SECURE DIGITAL STORAGE

Allen-Bradley 1756-L72 ControlLogix 5570 Controller

A standard ControlLogix 5570 controller with 4 MB user memory for modular automation and motion applications.

BrandAllen-Bradley / Rockwell Automation
Model1756-L72
Product TypeControlLogix 5570 Controller with 4 MB Memory
01

Product Profile

1756-L72 is a standard ControlLogix 5570 controller with 4 MB of user memory and 0.98 MB of I/O memory. It occupies a ControlLogix chassis slot and relies on separate communication modules for industrial networks.

1756-L72 is distinct from the 1756-L72S GuardLogix safety controller. Series, firmware, Logix Designer version, SD-card load image and chassis communication architecture must be retained for dependable replacement.

02

Technical Data

Manufacturer Allen-Bradley / Rockwell Automation
Model 1756-L72
Product Family ControlLogix 5570
Product Type Standard controller
User Memory 4 MB
I/O Memory 0.98 MB
Nonvolatile Memory 1 GB 1784-SD1 Secure Digital card supplied with the controller
Local Programming Port One USB client port
Embedded Network Port None
Maximum Digital I/O 128,000
Maximum Analog I/O 4,000
Controller Tasks Up to 32
Controller Connections Up to 500
Motion Capacity Up to 100 axes supported by the controller family configuration
Energy Storage Module 1756-ESMCAP removable capacitor module supplied with the controller
Power Dissipation 2.5 W at full load
Backplane Current 5 mA at 1.2 VDC and 800 mA at 5.1 VDC
Lifecycle Status Active Mature
Important Distinction 1756-L72 is standard control; 1756-L72S is the safety controller
03

System Role

  • Executes Studio 5000 Logix Designer applications in a modular ControlLogix chassis.
  • Coordinates local and distributed I/O through installed communication modules.
  • Supports motion, redundancy and process applications when the full system is qualified.
  • Uses Secure Digital storage and an energy-storage module for controlled project retention.
04

Compatibility

  • Match controller series and major firmware to the approved project.
  • Confirm Logix Designer version, electronic keying and every chassis module.
  • Review produced/consumed tags, motion groups, time synchronization and redundancy requirements.
  • Use 1756-L72S rather than 1756-L72 when the validated application requires GuardLogix safety control.
05

Applications

  • Machine and process control requiring the 4 MB ControlLogix 5570 memory class.
  • Coordinated motion applications with the documented communication architecture.
  • Redundant or PlantPAx-style systems after firmware and module qualification.
06

FAQ

Can 1756-L72 replace a 1756-L71 without project review?

The larger memory does not guarantee a direct change; series, firmware, project controller type, redundancy, motion and electronic keying must still be checked.

Is 1756-L72 a safety controller?

No. 1756-L72 is the standard 4 MB controller. The 1756-L72S and its safety partner are used for GuardLogix safety applications.

Why might a replacement 1756-L72 show a firmware mismatch?

The project is bound to a controller major revision; load the approved firmware and use the compatible Logix Designer release before downloading.

What should be copied from the original 1756-L72 before an exchange?

Preserve the project, SD-card image and load settings, tag values where required, network configuration, motion setup, clock and fault history.

What details should accompany an 1756-L72 quotation?

Provide series, firmware, Logix Designer version, chassis inventory, network modules, redundancy use, motion requirements, energy-storage code and test expectations.

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