Product Overview

The Allen Bradley 1756-IR6I functions as a high-precision temperature-measuring module for the ControlLogix platform. It provides six individually isolated channels designed specifically for Resistance Temperature Detectors (RTD) and direct resistance signals. By isolating each channel from the others and the backplane, this module eliminates ground loops and maintains signal integrity in electrically noisy industrial environments. We deliver this module as 100% Brand New original stock to ensure the highest accuracy for your thermal process monitoring.

Technical Specifications

Engineering Advantages

• Individual Channel Isolation: The 1756-IR6I features 250V continuous isolation between every channel. This architecture prevents common-mode noise and ground loops from affecting adjacent readings, which is critical when sensors are located far from the PLC chassis across different ground potentials.

• High-Resolution Sigma-Delta Conversion: The module utilizes Sigma-Delta conversion technology to filter out high-frequency noise and provide stable, 16-bit resolution. This ensures precise temperature data for applications requiring tight PID control loops.

• Broad Resistance Compatibility: Beyond standard Platinum RTDs, the module measures general resistance up to 3000 Ohms. This allows engineers to interface specialized sensors or potentiometers without requiring dedicated conversion hardware.

• Advanced Diagnostics: The 1756-IR6I continuously monitors each channel for "Open Wire" or "Short Circuit" conditions. The module flags these faults in the controller software, allowing for rapid identification of cable damage or sensor failure without physical probing.

FAQs

What is the benefit of the "I" suffix in 1756-IR6I compared to standard modules?

The "I" stands for Individually Isolated. While standard modules may group inputs together, the 1756-IR6I isolates every channel. This setup allows you to connect RTDs from different power zones or equipment without worrying about cross-channel interference or damage from potential differences.

Can I mix different RTD types on a single module?

Yes. You can configure each of the six channels independently within the Studio 5000 software. For example, you can monitor a Pt100 sensor on channel 0 and a Ni120 sensor on channel 1 simultaneously.

Does this module require a specific Removable Terminal Block (RTB)?

Yes, for 1756 Analog modules, we recommend using the 1756-TBNH (20-pin Cage Clamp) or 1756-TBSH (20-pin Spring Clamp). Ensure you use shielded twisted-pair cable to maintain the accuracy specifications listed.

Can the 1756-IR6I measure thermocouples?

No. This module is strictly for RTD and resistance-based measurements. If your application requires thermocouple inputs, you should select the 1756-IT6I or 1756-IRT8I modules instead.