Allen-Bradley 1746-INT4 SLC 500 Isolated Thermocouple Input Module
Buy the Allen-Bradley 1746-INT4 SLC 500 Isolated Thermocouple/mV Input Module. Four isolated channels, 16-bit resolution, and support for ten thermocouple types.
Product Summary
The Allen-Bradley 1746-INT4 is a precise SLC 500 module that converts thermocouple and millivolt signals into digital data. Engineers use this unit for accurate temperature monitoring in demanding industrial processes. Its four isolated channels protect your system from electrical noise and ground loops.
Expert Technical Evaluation & Performance Review
High-Resolution Signal Acquisition
The 1746-INT4 delivers exceptional measurement fidelity using a 16-bit Sigma-Delta ADC. This conversion method provides high noise rejection and stable readings. You can trust this module for critical temperature control loops.
Robust Channel Isolation
Each input channel on this module provides galvanic isolation from the other channels. The module also isolates all inputs from the SLC 500 backplane. This design eliminates ground loop currents that cause measurement errors.
Wide Thermocouple Compatibility
This module supports ten different thermocouple types including J, K, T, E, R, S, B, N, C, and D. You can also use it for -50 to 50 mV or -100 to 100 mV dc signals. This flexibility makes the 1746-INT4 suitable for diverse applications.
Advanced Noise Filtering Capabilities
The module uses an analog low-pass filter combined with a digital filter. It achieves a normal mode rejection greater than 60 dB at 60 Hz. The common mode rejection exceeds 120 dB between inputs and chassis ground.
Cold Junction Compensation and Accuracy
Built-in cold junction compensation ensures high accuracy across the operating range. The module maintains accuracy of ±1.5 °C from 0 to 70 °C ambient. This performance meets the needs of most industrial temperature sensing tasks.
Open-Circuit Detection for Safety
You can configure the module for upscale, downscale, or zero detection on open thermocouples. The detection time is typically 5 seconds. This feature alerts operators to sensor failures quickly.
Product Procurement & Buyer Guide
Matching the Module to Your Application
Verify that your SLC 500 chassis has an available slot for this module. The 1746-INT4 draws 110 mA at 5V DC and 85 mA at 24V DC. Ensure your power supply can handle this additional load.
Understanding Calibration Requirements
This module requires field calibration at least once every year. Plan your maintenance schedule accordingly. Proper calibration ensures the module maintains its specified accuracy.
Selecting the Correct Thermocouple Type
Configure the module for your specific thermocouple type using the SLC 500 programming software. The module supports linearization per the IPTS-68 standard. You can select temperature scales in °C or °F.
Input Range and Resolution Considerations
Choose between the -50 to 50 mV or -100 to 100 mV input ranges for millivolt signals. The module provides a resolution of 0.1 mV or 0.01 mV. Select the range that matches your sensor output for best accuracy.
Environmental and Certification Compliance
The module operates from 0 to 60 °C with 5 to 95 percent non-condensing humidity. It holds CE, CSA, and UL certifications for global use. This compliance simplifies acceptance in regulated industries.
Logistics & Standard Packaging Details
- One Allen-Bradley 1746-INT4 SLC 500 Isolated Thermocouple/mV Analog Input Module
- Installation and user manual
- Anti-static packaging for safe transport
- Express shipping available via FedEx, UPS, and DHL
