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Bulletin 1794 FLEX I/O In-Cabinet Modules

FLEX 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.

  • Overview
  • Product Selection
  • Specifications
  • Documentation
  • Resources


  • Digital and analog modules plus a breadth of specialty modules support a wide variety of applications
  • Removal and Insertion Under Power (RIUP) lets you replace modules and make cable connections while the system is in operation
  • FLEX-I/O XT™ extreme environment modules are rated for -20...70 °C (-4....185 °F) and are compatible with the ControlLogix-XT™ extreme environment system
  • Conformal coated modules are available
  • Each I/O module requires a terminal base for connection points for I/O wiring

1794 FLEX™ I/O Digital Modules

  • Cover a wide electrical range
  • Densities range from 8…32 points
  • Isolated inputs or outputs, protected outputs, electronic fusing, or diagnostics available on some modules

1794 FLEX I/O Analog Modules

  • Individually configurable channels
  • Selectable input filters on many modules
  • Single-ended or differential inputs
  • On-board scaling
  • Internal calibration
  • Thermocouple, RTD, and HART (Highway Addressable Remote Transmitter) modules available

1794 FLEX I/O Specialty Modules

  • Frequency modules
  • Very High Speed counter module
  • Pulse counter modules

Additional Information

The Rockwell Automation® PartnerNetwork™ offers complementary product solutions for 1794 Flex I/O modules through the Encompass Product Reference program.


FLEX I/O and FLEX Ex I/O Selection Guide1794-SG002


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

FLEX I/O conformal coated products meet or exceed the following standards:

  • ANSI / ISA-S71.04-1985, Class G1, G2, and G3 environments
  • CEI IEC 6065A-4 Class 1 and 2 environments
  • UL 746E

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.


FLEX I/O and FLEX I/O XT Product Profile1794-PP019
FLEX I/O and FLEX Ex I/O Selection Guide1794-SG002
FLEX I/O Analog Modules User Manual1794-UM002
FLEX I/O Analog Isolated Modules User Manual1794-UM008
FLEX I/O Diagnostic Modules User Manual1794-UM061
FLEX I/O Frequency Input Module User Manual1794-UM011
FLEX I/O HART Modules User Manual1794-UM063
FLEX I/O HART Isolated Modules User Manual1794-UM065
FLEX I/O Pulse Counter User Manual1794-UM016
FLEX I/O Thermocouple/Millivolt Module User Manual1794-UM007
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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