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Bulletin 1794 FLEX I/O In-Cabinet Modular


FLEX™ I/O offers the functionality of larger rack-based I/O without the space requirements. FLEX I/O offers cost-effectiveness, flexibility, modularity, and reliability. Communication options include EtherNet/IP™, ControlNet™, DeviceNet™, Universal Remote I/O, and other networks. FLEX‑I/O XT™ modules provide a distributed I/O solution for your ControlLogix‑XT™ extreme environment system.

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  • Modular design lets you independently select the I/O, termination style and network interface
  • Assembles without tools—all components snap onto a DIN rail and plug together to form the I/O system
  • Mounts horizontally or vertically on a standard DIN rail
  • Communicates on EtherNet/IP™, ControlNet™, DeviceNet™, Universal Remote I/O, and other networks
  • Removal and Insertion Under Power (RIUP) lets you replace modules and make connections while the system is in operation
  • FLEX-I/O XT™ extreme environment modules operate in a broader temperature range and are ANSI/ISA2, IEC and EMC-compliant
  • Configuration wizards speed engineering and installation


1794 FLEX™ I/O Communication Interfaces

  • Provides the interface between the FLEX I/O modules and backplane, and the desired network
  • Snaps onto the DIN rail

1794 FLEX I/O Terminal Bases

  • I/O module plugs into the terminal base
  • Provides terminal connection points for an I/O module
  • Snaps onto the DIN rail
  • Terminal bases plug into each other to form the system backplane

1794 FLEX I/O Modules

  • Provides I/O circuits
  • Plugs into a terminal base on the DIN rail
  • Connect a maximum of eight I/O modules in an assembly

1794 FLEX I/O Power Supplies

  • Two optional 120/220V AC-to-24V DC power supplies are available for powering the FLEX I/O system

1794 FLEX I/O Accessories

  • Variety of products to enhance installation flexibility and to fill special termination needs
  • Includes distribution boards, extender cables, marking kits, and other accessories


  • UL; UL Class I, Div 2; CE; CE / ATEX, CSA Class I, Div 2; C-Tick, Marine certification, SIL 2

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

Learn More

Our Extreme Environment (XT) System [PDF] includes control, communication, and distributed I/O products that extend the benefits of the Rockwell Automation Integrated Architecture to applications with more demanding environmental conditions.

Related Products

Communication Interfaces

Bulletin 1794 FLEX™ I/O Communication Adapter Modules enable the FLEX I/O modules to exchange data with an I/O scanner across a communication network. Communication adapters are available for EtherNet/IP™, ControlNet™, DeviceNet™, Universal Remote I/O, and other networks. A ControlNet adapter for extreme environments is also available.

I/O Modules

Bulletin 1794 FLEX™ I/O offers flexibility for your application with digital, analog, HART analog, and specialty I/O, with 4…32 points per module. You can mix and match digital and analog I/O with mounting and wiring options.

Power Supplies

Bulletin 1794 FLEX™ I/O power supplies provide power for the FLEX I/O communication adapter and I/O modules.

Terminal Bases

Each FLEX™ I/O module requires a terminal base unit that provides terminal connection points for I/O wiring. The terminal bases snap onto the DIN rail and plug together to form the backplane.


FLEX I/O and FLEX-I/O XT Product Profile1794-PP019
Extreme Environment (XT) System Product ProfileXT-PP001
FLEX I/O and FLEX Ex I/O Selection Guide1794-SG002
FLEX I/O System with ControlLogix for SIL2 Reference Manual1794-RM001
More 1794 FLEX I/O publications in Literature LibraryAll Languages

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Product Certifications

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