1794-IRT8 | Allen-Bradley Flex I/O Analog Input Module 8-In Thermocouple/RTD/Mv
1794-IRT8 | Allen-Bradley Flex I/O Analog Input Module 8-In Thermocouple/RTD/Mv
1794-IRT8 | Allen-Bradley Flex I/O Analog Input Module 8-In Thermocouple/RTD/Mv
    1794-IRT8 | Allen-Bradley Flex I/O Analog Input Module 8-In Thermocouple/RTD/Mv
1794-IRT8 | Allen-Bradley Flex I/O Analog Input Module 8-In Thermocouple/RTD/Mv

1794-IRT8 | Allen-Bradley Flex I/O Analog Input Module 8-In Thermocouple/RTD/Mv

Part #: 1794-IRT8 Manufactured by: Allen-Bradley
$934.00
$934.00
32 in Stock
Condition: New-Surplus Original Box
Shipping calculated at checkout.
Product Overview
The 1794-IRT8 module is an Allen-Bradley FLEX I/O millivolt, thermocouple, and RTD module. The Series B version of the All...  Read more
We accept:
  • American Express
  • Apple Pay
  • Diners Club
  • Discover
  • Google Pay
  • Mastercard
  • PayPal
  • Shop Pay
  • Venmo
  • Visa

Do you need help?

Call our Sales Manager
phone
+1 (828) 222-3490
Mon./Sat.: 7:00AM - 8:00PM
Write to us now
email
sales@iqelectro.com
Mon./Sat.: 7:00AM - 12:00PM
warranty
IQElectro 2-Year Warranty
Warranty for Product #: 1794-IRT8
IQElectro offers a free 2-year warranty on all products. You can trust that every purchase is a reliable investment in the future of your company. Warranty Terms
2-3 Day Free Shipping
Packed Ready to Ship
24/7 Expert Support
Return within 30-Days
IQElectro LLC BBB Business Review
IQElectro is Not an authorized distributor for Allen-Bradley
Original Manufacturer's Warranty Not Covered, This Product is SURPLUS.

Product Description P/N: 1794-IRT8

Description / Specifications

Description 

The Allen-Bradley 1794-IRT8 is a Flex I/O combination module. This module supports both RTD and Thermocouple sensors. It has Eight (8) channels in Two (2) groups of Four (4) with nominal input ranges of -40…100 mV dc for thermocouples for Thermocouple and 0…325 mV for RTDs for RTD. This module has a resolution of 14 bits.

 

Technical Specifications 

 

Brand Allen-Bradley
Series Flex I/O 1794
Part Number 1794-IRT8
Operating Shock 30 g
Vibration  5g 10 to 500 Hz
Storage Temperature –40…85 °C (–40…185 °F)
Operating Temperature 0 to 55 C (32 to 131 F)
Wire Size Determined by installed terminal base
Indicators 1 green power status indicator 8 red open input indicators
Mounting DIN Rail
Accuracy 0.05% of full range in mV mode with filtering selected Hardware only = 0.10% of full range in mV mode
Resolution 14 bits
Nominal input voltage ranges -40…100 mV DC for thermocouples 0…325 mV for RTDs mV default
Terminal base 1794-TB3G, 1794-TB3GS, 1794-TB3GK
Product Description Flex IO 8-Channel RTD / Thermocouple Input Module
Manufacturer Rockwell Automation
Nominal voltage 24 Volts DC
Indicator Power indicator
Inputs 8

  

 

Information About 1794-IRT8

The 1794-IRT8 module is an Allen-Bradley FLEX I/O millivolt, thermocouple, and RTD module. In a FLEX I/O system, the 1794-IRT8 module is connected to a terminal base and a power adapter.

The Allen-Bradley 1794-IRT8 is shipped with 2 cold junction compensators. This cold junction compensator increases the accuracy of the module for Thermocouple mode. 1794-IRT8 module has a nominal voltage rating of 24 Volts DC and 8 analog inputs. It can connect to up to 8 RTD or thermocouple inputs. The front panel of the 1794-IRT8 module has a nameplate that identifies the module, a removable label that the users can customize, a keyswitch position indicator, and LED status indicators.

Compatible RTD sensors for this module are 2-wire, 3-wire and 4-wire RTDs such as 100  Pt  = 0.00385 Euro -200…870 °C (-328…1598 °F) 200  Pt  = 0.00385 Euro -200…400 °C (-328…752 °F) 100 Pt  = 0.003916 U.S. -200…630 °C (-328…1166 °F) 100  Pt  = 0.003916 U.S. -200…400 °C (-328…752 °F) 100 ? Nickel -60…250 °C (-76…482 °F) 200 Nickel -60…200 °C (-76…362) °F) 120 Nickel -80…320 °C (-112…608 °F) 10 Copper -200…260 °C (-328…470 °F). While supported Thermocouple sensors by this module are Thermocouple Type B, E, J, K, TXK/XK(L), N, R, S, and T.

This module has a resolution of 14 bits with selectable data formats such as °C (implied decimal point XXX.X) °F (implied decimal point XXX.X) °K (implied decimal point XXX.X) -32767…32767 0…65535 0…5000 ohms mode (implied decimal point XXX.X) -4000…+10000 millivolt mode (implied decimal point XXX.XX).

The 1794-IRT8 has diagnostic functions embedded including an open circuit detection wherein module reading upscales or defaults to max value when in RTD and Thermocouple mode. It also has an open input detection time of 2 scans, overvoltage capability of 15V DC continuous at 25 °C.

When wiring signal wirings, recommended wires are Thermocouple wires as specified by the TC manufacturer and Belden 8761 for millivolt signal.



Manufacturer information

Allen-Bradley, a brand of Rockwell Automation, specializes in manufacturing industrial automation equipment. The product range includes programmable logic controllers (PLCs), motion control systems, safety devices, motor control equipment, automation software, and HMI panels. Allen-Bradley products are known for their reliability and integration with other systems.

Frequently Asked Questions about 1794-IRT8
Question: What is the 1794-IRT8?
Date Update:06/06/2025
Answer:

The Allen-Bradley 1794-IRT8 is a Flex I/O module that supports both thermocouple and RTD sensors. It is designed to collect temperature data from up to eight different channels in a single module. This module integrates seamlessly into distributed control systems, providing high-density temperature measurement in industrial environments. Its 14-bit resolution ensures precise readings. The 1794-IRT8 is essential for applications requiring accurate temperature monitoring and control.

Question: How does the 1794-IRT8 handle thermocouple and RTD signals?
Date Update:06/06/2025
Answer:

The 1794-IRT8 is designed to accommodate both thermocouple and RTD signals with precision:

  • It features 8 analog inputs, split into 2 groups of 4 channels each.
  • Nominal input voltage ranges are -40…100 mV DC for thermocouples and 0…325 mV for RTDs.
  • Cold junction compensation improves accuracy for thermocouple inputs.
  • A 14-bit resolution ensures accurate and reliable measurements.

The module also includes open circuit detection, which defaults to a maximum reading if a signal wire is broken.

Question: Does the 1794-IRT8 have diagnostic functions?
Date Update:06/06/2025
Answer:

Yes, the 1794-IRT8 includes built-in diagnostic functions. It supports open circuit detection, which causes the reading to upscale or default to the maximum value if the circuit is broken. The module can also detect an open input after two scan cycles. Overvoltage protection is included, with the module able to handle up to 15V DC continuously at 25°C. These features ensure safe and reliable operation.

Question: How should the 1794-IRT8 be wired and installed?
Date Update:06/06/2025
Answer:

The 1794-IRT8 should be installed on a compatible Flex I/O terminal base such as the 1794-TB3G, 1794-TB3GS, or 1794-TB3GK. For thermocouple inputs, users should select thermocouple wires specified by the thermocouple manufacturer to ensure accurate temperature readings. For millivolt signals, shielded cables like Belden 8761 are recommended to reduce electrical noise and interference. It’s essential to connect the module to a 24V DC power supply, ensuring all wiring is properly grounded and secured to maintain system reliability and measurement accuracy.

Question: Is the 1794-IRT8 still in production?
Date Update:06/06/2025
Answer:

Yes, the 1794-IRT8 is still in production, but it is currently classified as Active Mature. This means it remains available for purchase and supported by Rockwell Automation, but users are encouraged to plan for future migration to newer modules.

IQElectro is not an authorized distributor.
QElectro 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-IRT8 is a Flex I/O combination module. This module supports both RTD and Thermocouple sensors. It has Eight (8) channels in Two (2) groups of Four (4) with nominal input ranges of -40…100 mV dc for thermocouples for Thermocouple and 0…325 mV for RTDs for RTD. This module has a resolution of 14 bits.

 

Technical Specifications 

 

Brand Allen-Bradley
Series Flex I/O 1794
Part Number 1794-IRT8
Operating Shock 30 g
Vibration  5g 10 to 500 Hz
Storage Temperature –40…85 °C (–40…185 °F)
Operating Temperature 0 to 55 C (32 to 131 F)
Wire Size Determined by installed terminal base
Indicators 1 green power status indicator 8 red open input indicators
Mounting DIN Rail
Accuracy 0.05% of full range in mV mode with filtering selected Hardware only = 0.10% of full range in mV mode
Resolution 14 bits
Nominal input voltage ranges -40…100 mV DC for thermocouples 0…325 mV for RTDs mV default
Terminal base 1794-TB3G, 1794-TB3GS, 1794-TB3GK
Product Description Flex IO 8-Channel RTD / Thermocouple Input Module
Manufacturer Rockwell Automation
Nominal voltage 24 Volts DC
Indicator Power indicator
Inputs 8

  

 

Information About 1794-IRT8

The 1794-IRT8 module is an Allen-Bradley FLEX I/O millivolt, thermocouple, and RTD module. In a FLEX I/O system, the 1794-IRT8 module is connected to a terminal base and a power adapter.

The Allen-Bradley 1794-IRT8 is shipped with 2 cold junction compensators. This cold junction compensator increases the accuracy of the module for Thermocouple mode. 1794-IRT8 module has a nominal voltage rating of 24 Volts DC and 8 analog inputs. It can connect to up to 8 RTD or thermocouple inputs. The front panel of the 1794-IRT8 module has a nameplate that identifies the module, a removable label that the users can customize, a keyswitch position indicator, and LED status indicators.

Compatible RTD sensors for this module are 2-wire, 3-wire and 4-wire RTDs such as 100  Pt  = 0.00385 Euro -200…870 °C (-328…1598 °F) 200  Pt  = 0.00385 Euro -200…400 °C (-328…752 °F) 100 Pt  = 0.003916 U.S. -200…630 °C (-328…1166 °F) 100  Pt  = 0.003916 U.S. -200…400 °C (-328…752 °F) 100 ? Nickel -60…250 °C (-76…482 °F) 200 Nickel -60…200 °C (-76…362) °F) 120 Nickel -80…320 °C (-112…608 °F) 10 Copper -200…260 °C (-328…470 °F). While supported Thermocouple sensors by this module are Thermocouple Type B, E, J, K, TXK/XK(L), N, R, S, and T.

This module has a resolution of 14 bits with selectable data formats such as °C (implied decimal point XXX.X) °F (implied decimal point XXX.X) °K (implied decimal point XXX.X) -32767…32767 0…65535 0…5000 ohms mode (implied decimal point XXX.X) -4000…+10000 millivolt mode (implied decimal point XXX.XX).

The 1794-IRT8 has diagnostic functions embedded including an open circuit detection wherein module reading upscales or defaults to max value when in RTD and Thermocouple mode. It also has an open input detection time of 2 scans, overvoltage capability of 15V DC continuous at 25 °C.

When wiring signal wirings, recommended wires are Thermocouple wires as specified by the TC manufacturer and Belden 8761 for millivolt signal.



Manufacturer information

Allen-Bradley, a brand of Rockwell Automation, specializes in manufacturing industrial automation equipment. The product range includes programmable logic controllers (PLCs), motion control systems, safety devices, motor control equipment, automation software, and HMI panels. Allen-Bradley products are known for their reliability and integration with other systems.

Check Out These Related Products