Features:
- 8-Channel Thermocouple/RTD Input Interface for Flex I/O Terminal Base Units
- Integrates 14-Bit Resolution Signal Conversion with Open-Circuit Fault Detection
- Functions with 1794-TB3G, 1794-TB3GS, and 1794-TB3GK Terminal Bases
The 1794-IRT8XT operates as the dedicated temperature input module in a Flex I/O rack, providing precise analog-to-digital conversion for thermocouple and RTD signals. This 1794-IRT8XT module, specifically designed for industrial temperature measurement challenges, solves the problem of interfacing diverse temperature sensors directly with control systems without external signal conditioners. It continuously processes incoming low-level voltage inputs ranging from -40 to +100 mV DC for thermocouples and 0 to 325 mV for RTDs, converting these sensor signals into accurate digital data and distributing this information through the rack backplane to the controller.
The 1794-IRT8XT provides essential temperature measurement functions for the entire Flex I/O rack and is a critical component of the process monitoring path, directly affecting the accuracy and reliability of thermal control systems. One 1794-IRT8XT module is required per terminal base unit depending on the number of temperature points to be monitored.
For flexible temperature monitoring applications, the 1794-IRT8XT organizes its eight input channels into two isolated groups of four, allowing independent configuration of sensor types and measurement ranges. Primary application areas include chemical processing, food and beverage manufacturing, pharmaceutical production, and HVAC control, where precise thermal regulation is essential. In addition to standard continuous sampling, the module performs real-time fault monitoring through its internal circuitry. Using this method, the 1794-IRT8XT continually monitors the health of all input channels.
The 1794-IRT8XT Allen-Bradley Thermocouple/RTD Input Analog Module may still be available for purchase and support from Apter Power beyond End-Of-Life (EOL) by the manufacturer (OEM).
Allen-Bradley 1794-IRT8XT Thermocouple/RTD Input Analog Module Manuals,Datasheets,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.
Allen-Bradley 1794-IRT8XT Thermocouple/RTD Input Analog Module Specs
General
- Manufacturer Allen-Bradley
- Model 1794-IRT8XT
- Condition New Original ready stock
- Product Family 1794-IRT8,1794-IR8
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.
- Extreme Environments: Operates reliably in harsh oil pipelines and petrochemical facilities under severe temperatures (-20 °C to 70 °C).
- Thermal Management: Tracks high temperatures inside manufacturing furnaces, industrial kilns, and large commercial baking ovens.
- Safety Integration: Integrates directly into SIL 2 industrial safety architectures when deployed in dual-channel configurations.
- Power Systems: Measures real-time turbine bearing temperatures and generator core thermal shifts across utilities plants.
- Multi-Protocol Support: Connects to EtherNet/IP, ControlNet, and DeviceNet protocols using standard FLEX I/O network adapters.
- Backplane Integration: Links directly to the primary controller via the internal slide-in FlexBus backplane network.
- Universal Sensors: Accepts direct wiring from 2-wire, 3-wire, or 4-wire RTD sensors and millivolt signals.
- Thermocouple Types: Processes native voltage inputs from Type B, C, E, J, K, N, R, S, and T thermocouples.
- Cold Junction Compensation: Uses external 1794-CJC2 thermistor sensors attached at the terminal base block for error correction.
- High Resolution: Converts analog sensor inputs into precise 16-bit digital values for PLC data tables.
- Fast Sampling: Executes rapid channel updates to provide immediate data feedback for closed-loop control applications.
- Noise Suppression: Combines built-in fixed hardware filters with selectable digital filters to remove industrial electrical interference.
- Channel Diagnostics: Detects open-circuit sensor wire breaks, over-range value limits, and critical module hardware faults.
- Visual Status: Shows operational health and specific channel faults immediately via front-facing LED diagnostics indicators.
- Live Maintenance: Allows Removal and Insertion Under Power (RIUP) to swap modules without interrupting system power.