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.


  • 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