1734-IT2I | Allen-Bradley | POINT I/O 2-Channel Isolated Thermocouple Input Module

Product Overview

The 1734-IT2I provides high-precision temperature sensing within the Allen-Bradley POINT I/O family. This module accepts millivolt signals from thermocouples and converts them into digital temperature data for the controller. It features two individually isolated channels, making it the ideal choice for applications where ground loops or electrical noise threaten signal integrity. We supply this unit as 100% Brand New and factory-original, ensuring your thermal loops maintain laboratory-grade accuracy in rugged industrial environments.

Technical Specifications

The 1734-IT2I utilizes advanced delta-sigma conversion to deliver stable, high-resolution data even in electrically "dirty" environments.

Engineering Advantages

• Superior Noise Immunity: Individual channel-to-channel isolation prevents common-mode noise and ground loop currents from affecting temperature readings. This hardware architecture allows you to connect sensors located in different parts of a machine without worrying about voltage potential differences.

• High-Resolution Precision: The 15-bit delta-sigma converter filters out high-frequency interference. It delivers granular data that allows the PID loop to maintain tighter temperature tolerances, directly improving product quality in plastic extrusion, heat treating, or food processing.

• Predictive Maintenance with Open-Wire Detection: The module immediately identifies a broken thermocouple wire or a disconnected sensor. It sends a specific fault code to the controller, enabling the system to trigger a safe shutdown or alarm before process deviations occur.

• Hot-Swappable Efficiency: Like other POINT I/O modules, the 1734-IT2I supports Removal and Insertion Under Power (RIUP). You can replace a module without powering down the entire I/O rack, significantly reducing downtime during routine maintenance.

FAQs

• Does the 1734-IT2I require an external power supply?

  No. The module draws its operating power directly from the POINTbus. However, you must calculate the total current draw (175 mA for this module) to ensure your 1734-PDN or adapter power supply provides sufficient capacity for the entire rack.

• What type of terminal base should I use with this module?

  The 1734-IT2I typically installs onto a 1734-TBCJC (Thermocouple Cold Junction Compensation) terminal base. This base contains the necessary thermistor to perform accurate cold-junction compensation at the termination point.

• How does this module handle different thermocouple types (J, K, T, etc.)?

  You configure the specific thermocouple type via the Studio 5000 Logix Designer software. The module internalizes the linearization curves for all standard thermocouple types, providing temperature data directly in Celsius or Fahrenheit.

• Is the 1734-IT2I better than the non-isolated 1734-IT2?

  Yes, specifically in environments with high EMI or different ground potentials. The "I" in 1734-IT2I stands for isolation. While the standard IT2 is sufficient for simple, localized loops, the IT2I prevents a failure or noise on one channel from migrating to the other.