Introduction to the 140ATI03000C
When precise temperature monitoring is critical to your process, the Schneider Electric 140ATI03000C delivers reliable performance. This I/O expansion module is designed for Modicon Quantum systems, providing eight analog input channels specifically for thermocouple measurements. With 16-bit resolution and advanced filtering, it ensures accurate readings in demanding industrial environments.

Technical Specifications That Matter
The 140ATI03000C offers eight analog input points with 16-bit resolution, translating to fine temperature measurement granularity. It supports multiple thermocouple types: J, E, K, T, R, and S, covering a wide temperature range. For example, type K handles -270 to 1370 °C, while type S covers -50 to 1665 °C. The module includes a notch filter at 3 dB for 50/60 Hz and a single-pole low-pass filter at 20 Hz, effectively reducing electrical noise. Update time is 1000 ms, suitable for many temperature control loops. Bus current requirement is 280 mA, and power dissipation is 1.5 W. The module weighs 0.3 kg and operates in temperatures from 0 to 60 °C.
| Specification | Value |
|---|---|
| Input Points | 8 analog |
| Resolution | 16 bits |
| Thermocouple Types | J, E, K, T, R, S |
| Update Time | 1000 ms |
| Bus Current | 280 mA |
| Power Dissipation | 1.5 W |
| Isolation | 1780 V AC between channels and bus |
| Operating Temperature | 0…60 °C |
Why Choose the 140ATI03000C for Your Application
This module excels in industries where temperature accuracy is non-negotiable. In oil and gas processing, it monitors critical points like reactor temperatures or pipeline heating. Its 16-bit resolution and thermocouple compatibility make it ideal for furnace control in metal treatment, where even minor deviations affect product quality. The built-in filters ensure stable readings despite electrical interference from heavy machinery. For power generation, the module provides reliable data for turbine temperature monitoring, helping prevent costly downtime.

Installation and Maintenance Insights
Installing the 140ATI03000C is straightforward for those familiar with Modicon Quantum systems. Ensure proper grounding and follow manufacturer guidelines for wiring thermocouples. The module’s conformal coating (Humiseal 1A33) protects against harsh environments, but periodic inspection of connections is recommended. Since it has no output points, it focuses solely on input reliability. For maintenance, check for fault LEDs: red indicates channel faults or external issues, while green shows active channels. Regular calibration checks help maintain accuracy over time.
Compatibility and Integration
The 140ATI03000C integrates seamlessly with Modicon Quantum PLCs. It requires 10 input words for addressing. When incorporating into your system, verify that your Quantum rack supports the module’s power and space requirements. For network integration, consult your supplier about any needed gateways or cables. Oil AutoTech provides hands-on technical selection help to ensure compatibility with your existing setup.
Buyer’s Guide: Is the 140ATI03000C Right for You?
Before purchasing, confirm your thermocouple types and temperature ranges match the module’s capabilities. Check that your Quantum system has available slots and sufficient bus current. Consider the update time of 1000 ms—if your application requires faster sampling, evaluate alternatives. The module’s certifications (UL 508, CSA C22.2 No 142, cUL, FM Class 1 Division 2) make it suitable for hazardous locations. Oil AutoTech offers fast dispatch worldwide, so you can get spares when you need them. Contact Oil AutoTech today for pricing and availability.
