What is the 1794-IRT8？

The Allen-Bradley 1794-IRT8 is an 8-channel, non-isolated thermocouple, RTD, and millivolt input module used in FLEX I/O systems.

What are the primary input capabilities of the module?

The module features 8 analog inputs divided into two isolated groups of four channels each. It handles nominal input voltage ranges from -40 to 100 mV DC for thermocouples and 0 to 325 mV for RTD sensors.

Which terminal base units are compatible with the module?

It mounts onto 1794-TB3G, 1794-TB3GS, and 1794-TB3GK terminal base units.

Does the module utilize electrical isolation?

Yes, it features a continuous isolation voltage rating of 50V (Basic Insulation Type) between the field side and the system backplane.

What is the maximum current limit allowed through the terminal base?

The total current draw passed through any single terminal base unit is strictly capped at 10 A. If your configuration draws more, you must isolate the lines and utilize separate power connections.

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1794-IRT8

Name: 1794-IRT8
Brand: Allen-Bradley
SKU: 1794IRT8

Call us: +86-18020776786

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Product image is representative; revision or series may vary. Contact us to request a specific version.

Product Information

Product Describe

1794IRT8
INPUT MODULE
FLEX I/O
8 POINT
THERMOCOUPLE
RTD
MVOLT MODULE
140 MA
24 VOLT DC

Technical specifications for 1794-IRT8

Product Model

1794-IRT8
Spare Model

1794IRT8
Product Parameters

FLEX I/O INPUT MODULE
Tariff Code

8537101190
Country of origin

USA
Place of shipment

Xiamen, China
Estimated Shipping Size

13x13x8.7cm
Manufacturer

Allen-Bradley
Weight

0.2 kg
Number of inputs

8 channels
Nominal input voltage ranges

-40…+100 mV DC for thermocouples
Resolution

14 bits
Common mode input range, min

+15V
Overvoltage capability

15V DC continuous at 25 °C
Overall drift with temperature, max

50 ppm/°C of span
External DC power supply voltage

24V DC nom
Voltage range

19.2…31.2V DC
Supply current

95 mA @ 24V DC
Power dissipation, max

3.0 W @ 31.2V DC

Warranty Period & Disclaimer

Amikon is not an authorized distributor unless otherwise specified, representative, or affiliate of the manufacturer of this product. All trademarks and documents are the property of their respective owners and are provided for identification and informational.

FAQs

What is the 1794-IRT8？+

The Allen-Bradley 1794-IRT8 is an 8-channel, non-isolated thermocouple, RTD, and millivolt input module used in FLEX I/O systems.
What are the primary input capabilities of the module?+

The module features 8 analog inputs divided into two isolated groups of four channels each. It handles nominal input voltage ranges from -40 to 100 mV DC for thermocouples and 0 to 325 mV for RTD sensors.
Which terminal base units are compatible with the module?+

It mounts onto 1794-TB3G, 1794-TB3GS, and 1794-TB3GK terminal base units.
Does the module utilize electrical isolation?+

Yes, it features a continuous isolation voltage rating of 50V (Basic Insulation Type) between the field side and the system backplane.
What is the maximum current limit allowed through the terminal base?+

The total current draw passed through any single terminal base unit is strictly capped at 10 A. If your configuration draws more, you must isolate the lines and utilize separate power connections.

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Revisions

Revision Part #

Also known as

1794-IRT8/A

1794-IRT8-A Rev A

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1794-IRT8/B

1794-IRT8-B Rev B

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Product

MORE INFORMATION

Overview Manuals Technical notes Product Applications Signal Wiring & Sensors

Features:

FLEX I/O Thermocouple/RTD Input Analog Module
Flex I/O 1794
Wire-off, overrange, and underrange detection

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. 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.

The 1794-IRT8 Allen-Bradley FLEX I/O INPUT MODULE may still be available for purchase and support from Amikon Limited beyond End-Of-Life (EOL) by the manufacturer (OEM).

Allen-Bradley 1794-IRT8 FLEX I/O INPUT MODULE Manuals, Datasheets, Drivers, Link

Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description. All prices are shown in USD.

The module accepts up to eight thermocouple or RTD inputs. The inputs are nonisolated and areselected with analog multiplexers. The inputs accept millivolt or resistive inputs. Default inputspans are -40.00 mV… +100.00 mV or 0.0…500.0 Ω. Fault indicators are located field side.No switches or jumpers are used on the TC and RTD Input module. The inputs have both fixedhardware filters and selectable firmware digital filters

Process Manufacturing:Precise heat regulation for kilns/ovens/furnaces quality
Energy & Power:Gas turbine exhaust & boiler temp tracking
Machinery & Equipment:Prevents diesel engine/compressor overheating.
Oil, Gas, & Chemical:Piping/reactor temps in hazardous areas (FLEX I/O XT)

This content has been produced using multiple sources.Amikon takes no responsibility for the accuracy of this information. Always consult the original equipment manufacturer for the most up to date instructions and information.

Thermocouple Configurations: Attach the two provided 1794-CJC2 cold junction compensator sensors to the base terminals to actively adjust for localized temperature drifts. Use appropriate shielded thermocouple extension wire.

RTD Configurations: The hardware supports 2-wire, 3-wire, and 4-wire RTD options. For 3-wire variants, route the matching compensated leads directly to the dedicated return pins.

Millivolt (mV) Signals: Use high-quality shielded twisted-pair wiring (such as Belden 8761) to minimize industrial electromagnetic noise interference.

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