Rated 4.7 with 17 reviews


Revisions: Ser A


The Allen-Bradley 1794-IT8 Flex I/O Thermocouple Input Analog Module has 8 Channels Inputs, a -76.5-76.5mV Nominal Input Ranges, and a 16 bits Resolution. It also operates with a -60db @ 60Hz Normal Mode Noise Rejection and a 0-2.62Hz Channel Bandwidth.


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About 1794-IT8

The Allen-Bradley 1794-IT8 is a FLEX Thermocouple input module that can receive 8 signals from thermocouple sensors. The 1794-IT8 thermocouple input module allows thermocouple temperature sensors interaction with PLCs that are performing various calculations based on temperature readings. This module performs the initial digital processing of the thermocouple signal. As a part of the Allen-Bradley FLEX I/O system, the 1794-IT8 is mounted on the terminal base and it encompasses the bus interface and circuitry needed to perform temperature-generated millivolt signal processing related to the users’ applications. The module can be mounted on 3 terminal base units: the 1794-TB2, 1794-TB3, and the 1794-TB3T. Before inserting the 1794-IT8 module on the terminal base, the users should rotate the key switch on the base to Position 3 because this position is required for the safe mounting and operation of the thermocouple/mV module.

The Allen-Bradley 1794-IT8 FLEX I/O thermocouple module communicates with PLCs through the block-transferring option. Block transfer programming relies on input signal data words moving between the thermocouple module’s memory and a designated area in the PLC’s data table. Block transfer programming also supports the moving of the configuration words from the PLC data table to the thermocouple module. The Allen-Bradley 1794-IT8 module comes with 2 cold junction compensators that are engineered to be mounted in designated positions on the terminal base unit. The module is able to accept grounded and ungrounded thermocouples. The nominal input range for the input signals is -7.65 to 7.65 mV. The module is supplied with 24 Volts DC voltage and it has 16-bit input signal resolution. On the front side of the module, there is 1 inserted label with 8 fields reserved for individual input designations. The 1794-IT8 has a normal mode rejection ratio of -60 dB at 60 Hertz, a common mode input range of +/-10 Volts, and a common mode rejection ratio of -115 dB at 60 Hertz and 100 dB at 50 Hertz.

Technical specifications:

Part Number:1794-IT8
Product Type:Flex I/O Thermocouple Input Analog Module
Inputs:8 Channels
Nominal Input Ranges: -76.5 to 76.5 mV
Resolution:16 bits
Isolation Voltage:850 Volts DC
Normal Mode Noise Rejection: -60db at 60 Hertz
Channel Bandwidth:0 to 2.62 Hertz
Normal Mode System Throughput:325 milliseconds
Flexbus Current:20 mA
Power Dissipation:3W at 31.2 Volts DC maximum
Thermal Dissipation:10.2 BTU/hour at 31.2 Volts DC maximum


Question: What is the price of 1794-IT8?

Answer: Submit a quote request, send us an email, or call 800-730-0292 for our best price. 


Question: How many indicators are on 1794-IT8?

Answer: 1794-IT8 has 1 red/green power status indicator.


Question: What is the resolution of 1794-IT8?

Answer: The resolution of 1794-IT8 is 16 bits. 

Please refer to the manual for more information about the 1794-IT8 such as the wiring diagrams, data sheets, firmware information and migration or obsolescence details.

Revision Part # Also Known as Availability
1794-IT8 Ser A
1794-IT8/A, Series A, Rev A Request Quote

Common misspellings: 1794IT8
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