Allen-Bradley Analog Input Module 1794-IRT8XT

Product Description

It provides 8 isolated input channels that can be configured for Resistance Temperature Detectors (RTDs) or thermocouples (TCs). This module is part of the Flex I/O family, which is known for its modularity and flexibility in distributed I/O applications. The 'XT' suffix indicates an extended temperature range and conformal coating, making it suitable for harsh environments, including hazardous locations (Class I, Division 2). The 1794-IRT8XT supports a wide range of RTD types (e.g., 100Ω platinum, 120Ω nickel, 10Ω copper) and thermocouple types (J, K, T, E, R, S, B, N). It offers high-resolution temperature conversion with 16-bit (RTD) and 15-bit (thermocouple) resolution. The module communicates with the PLC via the Flex I/O backplane, using the 1794-IB10XTB6 or similar terminal bases. It features channel-to-channel isolation of 75V (continuous) and 850V (hipot) for robust signal integrity. Designed for demanding applications, the 1794-IRT8XT operates in an extended temperature range of -20°C to +70°C (with conformal coating). It is certified for use in Class I, Division 2 hazardous locations, making it ideal for oil & gas, chemical, and pharmaceutical industries. The module supports both RTD and thermocouple inputs, allowing users to mix sensor types on the same module, reducing the number of modules required. With its rugged design and high accuracy, the 1794-IRT8XT is a reliable choice for temperature monitoring and control in process automation. The Allen-Bradley 1794-IRT8XT is a Flex I/O module designed for temperature measurement in industrial automation.

Basic Product Information

• Supports multiple RTD types: 100Ω Pt, 120Ω Ni, 10Ω Cu, and more
• Supports thermocouple types: J, K, T, E, R, S, B, N
• Extended temperature range (-20°C to +70°C) with conformal coating
• Channel-to-channel isolation (75V continuous, 850V hipot)
• High resolution: 16-bit for RTD, 15-bit for thermocouple
• Hazardous location certification: Class I, Division 2
• Compatible with Flex I/O communication adapters (e.g., 1794-AENT, 1794-ASB)
• 8 isolated input channels for RTD or thermocouple sensors

Technical Specifications

Version & Model Difference

The 1794-IRT8XT is the extended temperature (XT) version of the standard 1794-IRT8 module. The XT version includes conformal coating on the circuit board, which protects against moisture, dust, and corrosive gases. It also has a wider operating temperature range (-20°C to +70°C) compared to the standard module (0°C to +55°C). The XT version is designed for use in harsh environments and hazardous locations. Functionally, both modules have the same input specifications and features, but the XT variant is more robust for demanding applications.

Application Scenarios