1794-IR8 | Allen-Bradley FLEX I/O RTD Input Module, 8 RTD Inputs
1794-IR8 | Allen-Bradley FLEX I/O RTD Input Module, 8 RTD Inputs
1794-IR8 | Allen-Bradley FLEX I/O RTD Input Module, 8 RTD Inputs
    1794-IR8 | Allen-Bradley FLEX I/O RTD Input Module, 8 RTD Inputs
1794-IR8 | Allen-Bradley FLEX I/O RTD Input Module, 8 RTD Inputs

1794-IR8 | Allen-Bradley FLEX I/O RTD Input Module, 8 RTD Inputs

Part #: 1794-IR8 Manufactured by: Allen-Bradley
$739.00
$739.00
5 in Stock
Condition: New – Open box
Shipping calculated at checkout.
Product Overview
The Allen-Bradley 1794-IR8 Flex I/O RTD Module has 8 Channels Inputs, a 1 to 433 ohms Nominal Input Ranges, and a 16 bits ...  Read more
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Product Description P/N: 1794-IR8

Description / Specifications

Description 

The Allen-Bradley 1794-IR8 is an eight-channel RTD input module for the FLEX I/O platform, designed to interface directly with resistance temperature detectors in distributed control systems. It provides high-resolution signal processing and mounts on a DIN rail or panel for compact cabinet integration.


 

Technical Specifications 

Condition New/Never Used Surplus
Brand Allen-Bradley
Category I/O Modules
Part Number 1794-IR8
Subcategory RTD Input Modules
Number of Channels 8
Input Type RTD (Resistance Temperature Detector)
Resistance Range 1–433 ohms nominal
Resolution 16-bit
Power Supply 24 VDC
Mounting Type DIN Rail / Panel
Terminal Connection Screw
Operating Temperature 32–131 °F
Enclosure None (open-style)
Certifications C-TICK, CE, CSA, CUL, GOST, KC, Marine, UL
Application Distributed RTD Temperature Monitoring
Weight 0.3 lb

 

 

Information About 1794-IR8

The 1794-IR8 is part of the FLEX I/O family and supports eight RTD input channels with a nominal resistance range of 1–433 ohms, making it suitable for temperature monitoring in industrial applications. It offers 16-bit resolution for accurate measurement and operates on a 24 VDC power supply with screw-type terminals for secure field wiring. The module installs on a DIN rail or panel and is rated for use between 32 °F and 131 °F within typical cabinet environments. With global certifications including UL, CE, CSA, CUL, KC, Marine, GOST, and C-TICK, the 1794-IR8 integrates reliably into distributed temperature sensing architectures.

Key Features:

  • Eight RTD Input Channels: Supports multiple temperature sensing points for distributed monitoring.
  • Wide Resistance Range: Accepts RTD signals from 1 to 433 ohms to accommodate various sensor types.
  • High 16-Bit Resolution: Provides precise measurement capability for temperature-critical processes.
  • FLEX I/O Compatibility: Integrates seamlessly with FLEX adapters and terminal bases for modular architectures.
  • 24 VDC Power Operation: Runs on standard 24 VDC control power for simple panel integration.
  • Secure Screw Terminals: Provides reliable field wiring connections suited for industrial use.
  • DIN-Rail or Panel Mounting: Enables flexible installation in compact or distributed control panels.
  • Certified for Global Use: Meets CE, UL, CUL, KC, Marine, GOST, and C-TICK standards for international compliance.

The 1794-IR8 delivers the reliability and precision required for multi-point temperature monitoring in distributed FLEX I/O installations.

Frequently Asked Questions about 1794-IR8
Question: What is the module’s operating temperature range?
Date Update:04/06/2025
Answer:

The operating temperature range for the 1794-IR8 is 0°C to 55°C (32°F to 131°F). It can be stored in temperatures from -40°C to 85°C (-40°F to 185°F), making it suitable for most industrial environments. It also tolerates 5g vibration from 10 to 500 Hz and shock up to 30g during operation. The rugged construction allows it to maintain reliable performance in harsh conditions. Proper panel ventilation helps maximize accuracy and longevity.

Question: What is the resolution and accuracy of this module?
Date Update:04/06/2025
Answer:

The 1794-IR8 features a 16-bit resolution across the 435-ohm measurement range. This allows it to detect minute changes in resistance, providing high-precision temperature readings. In normal mode, accuracy is up to 0.05% of full scale, and in enhanced mode, it improves to 0.01% (typical) at low humidity. Such precision is ideal for applications requiring tight temperature control. This high accuracy makes it suitable even for laboratory or high-spec industrial environments.

Question: How much does the 1794-IR8 module weigh?
Date Update:04/06/2025
Answer:

The Allen-Bradley 1794-IR8 module weighs approximately 85 to 100 grams (or about 0.19 to 0.22 pounds) without the terminal base. This lightweight design supports easy installation on DIN rails and minimizes mechanical stress on the panel. When combined with a terminal base and wiring, the total weight increases slightly but remains suitable for compact I/O systems. The low mass also allows the module to withstand vibration up to 5g without compromising performance. For transport or shipping calculations, consult the Rockwell Automation packaging specifications.

Question: How does the 1794-IR8 handle noise and signal integrity?
Date Update:04/06/2025
Answer:

The module includes advanced A/D filtering and noise rejection features. It has a normal mode noise rejection ratio of -60 dB at 60 Hz, which effectively filters out power line interference. Its A/D filter cutoff is set at 10 Hz, optimizing accuracy while maintaining responsiveness. Enhanced mode offers additional filtering and averaging to reduce sensor noise. These features make the 1794-IR8 reliable in electrically noisy industrial environments.

Question: Is the 1794-IR8 still in production?
Date Update:04/06/2025
Answer:

Yes, the 1794-IR8 is currently in production and actively supported by Rockwell Automation. It remains part of the FLEX I/O family, which continues to be used in modern control systems. The module is available from authorized Allen-Bradley distributors and is included in current Rockwell catalogs. It is suitable for both new installations and retrofitting existing systems. As always, it’s wise to verify long-term availability if used in critical projects.

IQElectro is not an authorized distributor.
IQElectro LLC (IQElectro) is NOT an Authorized Distributor or in any way affiliated with Rockwell Automation, Siemens, or any other Manufacturers. IQElectro is NOT an Authorized Dealer of this product. The product may be of older version, date codes, or design than that available from authorized dealers. As IQElectro is not an authorized dealer of this product, the Original Manufacturer's Warranty and Support DO NOT apply. IQElectro sells SURPLUS only and DOES NOT SELL SOFTWARE or FIRMWARE licenses For more detailed information, please refer to the full version of our disclaimer policy Disclaimer Policy.
Description / Specifications

Description 

The Allen-Bradley 1794-IR8 is an eight-channel RTD input module for the FLEX I/O platform, designed to interface directly with resistance temperature detectors in distributed control systems. It provides high-resolution signal processing and mounts on a DIN rail or panel for compact cabinet integration.


 

Technical Specifications 

Condition New/Never Used Surplus
Brand Allen-Bradley
Category I/O Modules
Part Number 1794-IR8
Subcategory RTD Input Modules
Number of Channels 8
Input Type RTD (Resistance Temperature Detector)
Resistance Range 1–433 ohms nominal
Resolution 16-bit
Power Supply 24 VDC
Mounting Type DIN Rail / Panel
Terminal Connection Screw
Operating Temperature 32–131 °F
Enclosure None (open-style)
Certifications C-TICK, CE, CSA, CUL, GOST, KC, Marine, UL
Application Distributed RTD Temperature Monitoring
Weight 0.3 lb

 

 

Information About 1794-IR8

The 1794-IR8 is part of the FLEX I/O family and supports eight RTD input channels with a nominal resistance range of 1–433 ohms, making it suitable for temperature monitoring in industrial applications. It offers 16-bit resolution for accurate measurement and operates on a 24 VDC power supply with screw-type terminals for secure field wiring. The module installs on a DIN rail or panel and is rated for use between 32 °F and 131 °F within typical cabinet environments. With global certifications including UL, CE, CSA, CUL, KC, Marine, GOST, and C-TICK, the 1794-IR8 integrates reliably into distributed temperature sensing architectures.

Key Features:

  • Eight RTD Input Channels: Supports multiple temperature sensing points for distributed monitoring.
  • Wide Resistance Range: Accepts RTD signals from 1 to 433 ohms to accommodate various sensor types.
  • High 16-Bit Resolution: Provides precise measurement capability for temperature-critical processes.
  • FLEX I/O Compatibility: Integrates seamlessly with FLEX adapters and terminal bases for modular architectures.
  • 24 VDC Power Operation: Runs on standard 24 VDC control power for simple panel integration.
  • Secure Screw Terminals: Provides reliable field wiring connections suited for industrial use.
  • DIN-Rail or Panel Mounting: Enables flexible installation in compact or distributed control panels.
  • Certified for Global Use: Meets CE, UL, CUL, KC, Marine, GOST, and C-TICK standards for international compliance.

The 1794-IR8 delivers the reliability and precision required for multi-point temperature monitoring in distributed FLEX I/O installations.

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