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Bulletin 1756 ControlLogix I/O Chassis-Based

ControlLogix I/O

Bulletin 1756 ControlLogix® I/O modules provide a full range of digital, diagnostic digital, analog, motion control, and specialty I/O to meet your application needs. You can use any of the I/O modules in the local chassis of a ControlLogix controller or in a chassis linked to a ControlLogix controller across ControlNet™ or EtherNet/IP™ networks.

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  • What's New
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  • Specifications
  • Software
  • Documentation
  • Resources


  • Mounts in a ControlLogix® chassis
  • Requires either a removable terminal block (RTB) or a Bulletin 1492 wiring interface module (IFM) to connect all field-side wiring
  • Includes inherent time-stamping capabilities for sequence of events (SOE) applications
  • Offers comprehensive I/O diagnostics for detection of both system and field-side failures
  • Provides removal and insertion under power (RIUP) for ease of maintenance
  • Offers electronic keying to help prevent replacement errors
  • Includes I/O wizards in the Studio 5000™ Logix Designer application to enable quick and easy module configuration
  • Available with conformal coating to help protect in harsh environments

1756 ControlLogix Digital I/O Modules

  • Variety of voltages
  • 8 to 32 points per module
  • Isolated and non-isolated module types
  • Point-level output fault states
  • Direct-connect or rack-optimized communication
  • Field-side diagnostics on select modules

1756 ControlLogix Analog I/O Modules

  • Input, output, and combination modules
  • Thermocouple and RTD modules
  • On-board data alarming
  • Scaling to engineering units
  • Real-time channel sampling
  • Electronic module keying, software configurable
  • Mechanical RTB keying, user-defined
  • Per channel configuration for voltage, current or 2-wire transmitter current sourcing
  • Per channel configuration for either RTD or Thermocouple

1756 ControlLogix Specialty I/O Modules

  • Configurable flow meter modules
  • High-speed counter modules
  • Programmable limit switch modules

1756 ControlLogix Removable Terminal Blocks (RTBs)

  • Provide a flexible interconnection between plant wiring and I/O modules
  • Screw-clamp or spring-clamp terminations
  • Not shipped with I/O modules; you must order separately

1756 HART Analog Isolated I/O Modules

  • Channel-to-channel isolation
  • HART modem per channel for faster HART data update
  • Basic field device configuration via the Add-on Profile
  • Helps eliminate the need for field isolating barriers when using isolated modules

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.

The Rockwell Automation® PartnerNetwork™ offers complementary product solutions for 1756 ControlLogix I/O modules through the Encompass Product Reference program.

1756 HART Analog Isolated I/O Modules Provide Increased Functionality

  • Offers channel-to-channel isolation
  • Includes a HART modem per channel for faster HART data update
  • Provides basic field device configuration via the Add-on Profile
  • Helps eliminate the need for field isolating barriers when using isolated modules


ControlLogix I/O Modules Technical Data1756-TD002


  • ATEX
  • C-Tick
  • CE Marked
  • CSA Certified
  • cULus Marked
  • FM Approved
  • TÜV

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 Studio 5000 Logix Designer from Rockwell Software® to design and configure your ControlLogix® 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 HART I/O Modules Product Profile1756-PP016
Extreme Environment (XT) System Product ProfileXT-PP001
ControlLogix Isolated Analog I/O Product Profile1756-PP020
ControlLogix Peer-to-Peer I/O Product Profile1756-PP018
ControlLogix System Selection Guide1756-SG001
ControlLogix I/O Modules Technical Data1756-TD002
ControlLogix Digital I/O Modules User Manual1756-UM058
ControlLogix Analog I/O Modules User Manual1756-UM009
More 1756 ControlLogix I/O Module publications in Literature LibraryAll Languages

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Product Certifications

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

Configuration & Selection Tools

Other Resources

  • Electronic Data Sheets — Find DeviceNet™, ControlNet™, EtherNet/IP™, and network-independent EDS files.
  • Knowledgebase — Visit our online resource for technical information, support chat and forums, software updates, and product safety advisories/notices.