Thermocouple Input Module Allen-Bradley 1794-IT8 Flex I/O

Product Overview

The Allen-Bradley 1794-IT8 is a Flex I/O thermocouple and millivolt input module. It has 8 analog input channels. The module supports thermocouple types J, K, E, R, N, S, B, C, T, and L. It also accepts ±76.5 mV signals from transducers. This module provides 16-bit resolution for precise measurement. It uses block transfer for data exchange. The 1794-IT8 works with any Flex I/O communication adapter. Its key features include a FlexBus current draw of 20 mA and power dissipation of 3W at 31.2V DC.

Application Scenarios

This module is ideal for temperature monitoring in industrial processes. Use it with ovens, furnaces, and chemical reactors. It also connects to transducers that output millivolt signals. Industries include manufacturing, power generation, and oil & gas. The 1794-IT8 fits automated assembly lines and process control systems. It ensures accurate data collection for quality control.

Technical Specifications

• Input Channels: 8
• Resolution: 16 bits (2.384 microvolts typical)
• Nominal Input Range: -76.5 to 76.5 mV
• FlexBus Current: 20 mA
• Power Dissipation: 3W maximum at 31.2V DC
• Isolation Voltage: 850V DC
• Normal Mode Rejection: -60 dB at 60 Hz
• Channel Bandwidth: 0 to 2.62 Hz
• System Throughput: 325 ms
• CJC Unit: A-B Part Number 969424-0
• Keyswitch Position: 3
• Module Location: 1794-TB2, -TB3, -TB3T Terminal Base Units

Installation & Maintenance Guide

Mount the module on a compatible terminal base unit. Set the keyswitch to position 3 before insertion. Connect grounded or ungrounded thermocouples. Use block transfer programming to configure data exchange. The cold junction compensators (CJC) attach to designated spots on the base. The module requires 24V DC power. It has a red/green status indicator. Regular inspection of connections ensures reliable operation.

Packing List

• 1 x 1794-IT8 Thermocouple Input Module
• 1 x Product Label
• 1 x User Manual

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