Product Overview
The Schneider Electric 140ATI03000C is an I/O expansion module designed for Modicon Quantum automation platforms. This module focuses exclusively on analog input functionality, providing eight channels for thermocouple measurements. With a 16-bit resolution, it ensures precise signal conversion for accurate temperature readings in industrial control systems.

Technical Specifications Breakdown
Key parameters for the 140ATI03000C are listed below for quick reference:
| Feature | Specification |
|---|---|
| Manufacturer | Schneider Electric |
| Product Line | Modicon Quantum |
| Part Number | 140ATI03000C |
| Number of Input Points | 8 |
| Input Type | Analog |
| Analog Input Nature | Thermocouple |
| Analog Input Resolution | 16 bits |
| Update Time | 1000 ms |
| Bus Current Requirement | 280 mA |
| Power Dissipation | 1.5 W |
| Filter Type | Notch filter - 3 dB at 50/60 Hz, Single pole low pass - 3 dB at 20 Hz |
Industry Applications
This module excels in temperature monitoring applications where thermocouple inputs are required. Typical use cases include:
- Process heating control: Monitoring furnace or oven temperatures using J, K, or T thermocouples.
- Environmental chambers: Accurate temperature sensing for test and simulation chambers.
- Industrial ovens and kilns: Reliable data acquisition for high-temperature processes.

Installation & Setup Guidance
When installing the 140ATI03000C, ensure the Modicon Quantum rack is powered down. Insert the module into an available slot and secure it with the locking mechanism. The module requires 10 input words for addressing. Connect thermocouple wires to the appropriate terminals, observing polarity. Use shielded twisted-pair cables for long runs to minimize noise. The module supports cold junction compensation internally from 32 to 140 °F (0 to 60 °C).
Maintenance & Reliability
Periodically inspect the module for dust accumulation and ensure adequate airflow. The module features conformal coating (Humiseal 1A33) for protection against moisture and contaminants. Operating temperature range is 32 to 140 °F (0 to 60 °C), with storage from -40 to 185 °F (-40 to 85 °C). Relative humidity should be kept below 95% without condensation.
Compatibility & Integration
The 140ATI03000C integrates seamlessly with Modicon Quantum automation platforms. It supports various thermocouple types: J, E, K, T, R, and S, covering wide temperature ranges. The module uses a notch filter at 50/60 Hz and a single pole low pass filter at 20 Hz to reduce electrical noise.
Selection Guide & Purchasing Advice
For reliable temperature input in your Modicon Quantum system, the 140ATI03000C is a specialized solution. SpareTechPLC offers this module with fast shipping and expert support. Verify current lifecycle status and availability with SpareTechPLC before ordering.
Troubleshooting & Common Issues
- Broken wire detection: The module can detect broken thermocouple wires; check connections if a fault LED illuminates.
- Overtracking scale: If readings exceed expected ranges, verify thermocouple type and configuration.
- LED indicators: One green LED for bus communication, one red LED for external fault, eight green LEDs for channel status, and eight red LEDs for channel faults.