Allen-Bradley Allen-Bradley Home
Bulletin 1756 ControlLogix Standard Controllers

ControlLogix Standard Controllers

Our Bulletin 1756 ControlLogix® Standard Controllers are suitable for process, motion, discrete, and high-availability applications. As part of our Integrated Architecture™ system, these controllers use RSLogix™ 5000 programming software (L6 models), the Studio 5000™ environment (L7 models), and common network protocols. These high-performance controllers provide a common control engine with a common development environment for all control disciplines. Consider these controllers for more sophisticated machines and for connectivity to business systems.

  • Overview
  • Product Selection
  • Specifications
  • Software
  • Documentation
  • Resources
  • Applications


  • Provide twice the processing speed in the L7 models when compared to the L6 models
  • Support Integrated Motion on EtherNet/IP™, integrated Sercos™ motion, and analog motion
  • Support full controller redundancy
  • Support removal and insertion under power (RIUP)
  • Communicate via EtherNet/IP, ControlNet™, DeviceNet™, Data Highway Plus™, Remote I/O, SynchLink, and third-party process and device networks
  • Let you program using relay ladder logic, structured text, function block, and SFC languages
  • Offer flexible user memory options

Product Comparison

L7 Models
L6 Models
Performance Capability Twice the performance of L6 models High
Max. Controller Connections 500 250
Built-in Port USB Serial
Energy Storage Module (ESM) Included Yes No
Battery Required No Yes
On-board Display Included Yes No
Supported in Studio 5000™ Environment Yes No
Non-volatile Memory Secure Digital card CompactFlash card
Max. User Memory 32 MB 32 MB
Max. I/O Points 128,000 digital; 4,000 analog 128,000 digital; 4,000 analog
I/O Module Integration 1756 ControlLogix I/O 1756 ControlLogix I/O

Additional Information

Rockwell Automation® Integrated Architecture Solutions provide the foundation to drive plantwide optimization efficiently and effectively, enabling you to respond competitively to the economy and changes in consumer demand.


ControlLogix Controllers Specifications Technical Data1756-TD001


ControlLogix Standard Controllers, L7 models

  • c-UL-us
  • CE
  • C-Tick
  • ATEX
  • KC

ControlLogix Standard Controllers, L6 models

  • c-UL-us
  • CSA
  • CE
  • C-Tick
  • ATEX
  • KC
  • FM

For TÜV and SIL certification details, see the Safety Certificates and SIL link.

Certifications apply when product is marked. See our Product Certification site for Declarations of Conformity, certificates and other certification details.

Looking for Additional Information?

To find additional product information (CAD drawing files, 3D models, etc.) enter the complete catalog number (including dashes) below.


Use RSLogix 5000 programming software (L6 models) or the Studio 5000 Logix Designer software (L7 models) from Rockwell Software® to design and configure your ControlLogix® or GuardLogix® system.

The controllers and modules you select, along with your network configuration, determine what additional software packages you need to configure and program your system. Additional required software may include RSNetWorx configuration software and RSLinx communication software.

Learn More

Additional software products are available from Rockwell Software.


Integrated Architecture BrochureIA-BR005
ControlLogix Programmable Automation Controllers Product Profile1756-PP015
ControlLogix Redundancy Product Profile1756-PP017
Armor ControlLogix and Armor GuardLogix Product Profile1756-PP019
ControlLogix Selection Guide1756-SG001
ControlLogix Controllers Specifications Technical Data1756-TD001
ControlLogix System User Manual1756-UM001
ControlLogix Enhanced Redundancy System User Manual1756-UM535
Logix5000 Controllers Common Procedures Programming Manual1756-PM001
Logix5000 Controllers Design Considerations Reference Manual1756-RM094
More ControlLogix publications in Literature LibraryAll Languages

Can’t Find What You Need?

Browse Literature Library where you can search for additional technical and commercial publications in more languages.

Product Certifications

See our Product Certification site for Declarations of Conformity, certificates and other certification details.

Configuration & Selection Tools

Other Resources

  • Drives and Motion Accelerator Toolkit — Use selection tools, layout & wiring drawings, and HMI files to design, install, operate, and maintain a Rockwell Automation® drive system.
  • EtherNet/IP Capacity Tool — Calculate resources used by a proposed EtherNet/IP™ network.
  • Firmware Updates — Log in to get support for firmware updates.
  • Logix Designer Start Page — Use these videos (formerly RSLogix™ 5000 Start Pages) to quickly learn important tasks in Studio 5000™ Logix Designer application.
  • PLC-5/SLC Interactive Migration Tool — Migrate your PLC-5 or SLC system to a Logix-based solution using products such as the I/O Wiring Conversion System.
  • Software Updates — Log in to get support for software updates.
  • Knowledgebase — Visit our online resource for technical information, support chat and forums, software updates, and product safety advisories/notices.


Our ControlLogix® controllers offer the memory, speed, and processing capabilities to meet the demands of basic plant floor applications to high-performance process and motion applications.

For process applications, these controllers:

  • offer increased capacity, letting you execute more control strategies in each task
  • significantly improve the amount of information to be exchanged between control and supervisory layers
  • offer a significant improvement in the performance of redundant control applications

For motion applications, these controllers:

  • provide high-speed motion command and axis trajectory planner execution for complex, high-performance motion applications
  • are optimized for control of high performance motion drives on EtherNet/IP™ or Sercos™ interface
  • support as many as 100 axes of integrated motion

For discrete applications, these controllers:

  • significantly improve controller scan times using a faster dual-core CPU
  • offer improved communication rates
  • provide faster cross-loading for redundancy systems

Customer Success