The Schneider Electric TM3AI4 is a high-precision analog input expansion module, part of the Modicon TM3 I/O system. Designed specifically for Modicon M221, M241, and M251 controllers, the TM3AI4 allows seamless expansion of analog input capacity, providing 4 channels for processing voltage or current signals from various analog sensors.

This module plays a crucial role in automation applications requiring accurate analog signal acquisition, such as monitoring temperatures, pressures, fluid levels, or other continuously variable process parameters. Its compact size, rugged design, and plug-and-play configuration make it an ideal choice for both OEMs and end-users across industrial sectors.

Whether used in standalone machine applications or complex multi-device systems, the TM3AI4 delivers consistency, accuracy, and flexibility — ensuring that your control system stays responsive and scalable.

Product Specifications

Applications

The TM3AI4 is suitable for a wide variety of industrial and commercial automation applications, especially where analog signal acquisition is crucial:

• Temperature Monitoring: Integrates with RTDs or analog temperature transmitters in HVAC or processing plants.

• Pressure and Flow Control: Interfaces with 4–20 mA pressure or flow transmitters in water treatment or oil & gas facilities.

• Machine Condition Monitoring: Captures real-time analog values for vibration, load, or speed feedback.

• Level Measurement: Used in chemical or beverage industries for tank level monitoring.

• Building Automation: Reads analog signals from environmental sensors in smart building systems.

• Process Control Systems: Gathers continuous input from instrumentation devices for accurate process regulation.

Advantages

• Compact Design: Its small footprint allows easy integration into limited-space control panels.

• Flexible Signal Support: Accepts both current (0–20 mA / 4–20 mA) and voltage (0–10 V) inputs.

• High Accuracy: With 12-bit resolution and ±0.5% full-scale accuracy, it delivers reliable data.

• Rapid Conversion: Fast conversion time of 3 ms per channel ensures real-time performance.

• Simple Integration: Connects directly to M221, M241, and M251 controllers via TM3 expansion port.

• Built-In Diagnostics: Channel-specific LEDs for fast troubleshooting and commissioning.

• Low Power Consumption: Efficient design with minimal impact on base controller power draw.

• Field-Proven Durability: Designed to perform under industrial temperatures and electrical noise.

Frequently Asked Questions (FAQ)

1. Q: What controllers are compatible with TM3AI4?

   A: It is compatible with Modicon M221, M241, and M251 programmable controllers.

2. Q: Can TM3AI4 accept both voltage and current input signals?

   A: Yes, each input channel can be configured individually for 0–10V, 0–20mA, or 4–20mA signals.

3. Q: Does this module require a separate power supply?

   A: No, it is powered through the TM3 bus from the base controller.

4. Q: Is it hot-swappable?

   A: No, it must be powered down before installing or removing the module.

5. Q: Are the inputs isolated from each other?

   A: The inputs share common isolation from the control system, not individually isolated.

6. Q: What software is used to configure the TM3AI4?

   A: Use EcoStruxure Machine Expert (formerly SoMachine) for setup and programming.

7. Q: How do I know if an input is active or faulted?

   A: Each channel has a dedicated LED indicator for quick visual feedback.

8. Q: Can the module handle thermocouples directly?

   A: No, TM3AI4 is designed for analog voltage or current transmitters, not direct thermocouple input.

9. Q: What is the recommended cable length for analog signals?

   A: Up to 30 meters using shielded twisted-pair cable to minimize signal degradation.

10. Q: Is there any calibration required for the module?

    A: No field calibration is needed. The module comes factory-calibrated for industrial accuracy.