Introduction
The Schneider TM3AI2H Analog Input Module is a precision expansion unit from the Modicon TM3 series, designed to interface analog signals from field sensors directly into TM3 logic controllers. Whether measuring temperature, pressure, level, or flow, this module provides accurate and reliable analog acquisition, enabling PLC logic and HMI/SCADA systems to analyze real‑world process variables effectively. Its industrial‑grade design ensures stable performance in demanding automation environments.
Technical Specifications
| Specification | Details |
|---|
| Model Number | TM3AI2H |
| Module Type | Analog Input Expansion Module |
| Compatible Series | Modicon TM3 Logic Controllers |
| Analog Input Channels | 2 |
| Input Signal Types | 0–10 V DC, 0–20 mA / 4–20 mA |
| Input Resolution | 12‑bit (4096 counts) |
| Input Impedance | High impedance for voltage; low for current mode |
| Sampling Rate | ≤ 10 ms per channel |
| Common‑Mode Rejection | High industrial CMRR |
| Supply Voltage | 24 V DC |
| Power Consumption | Low‑power design |
| Connection Type | Removable screw or spring‑clamp terminals |
| Mounting | DIN‑rail or symmetrical rail mount |
| Protection Rating | IP20 |
| Operating Temperature | 0°C to 60°C |
| Storage Temperature | −25°C to 70°C |
| Humidity | 5–95% non‑condensing |
| Dimensions | Approx. 90 mm × 23.5 mm × 70 mm |
| Weight | Approx. 85 g |
Applications
The TM3AI2H is suitable for automation systems where precise analog measurements are required:
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Temperature, pressure, and level measurement loops
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Feedback for PID control in machine and process automation
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Analog signal logging for historical analysis and quality control
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Integration with HMI/SCADA systems for process visualization
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Acquisition of sensor data in building and facility automation
Its dual‑channel design enables efficient handling of multiple analog inputs in compact control systems.
Advantages
Dual Analog Input Channels
Two input channels allow simultaneous acquisition of separate analog signals for improved system efficiency.
Flexible Signal Compatibility
Supports both voltage (0–10 V DC) and current (0–20 mA / 4–20 mA) input types — ideal for various industrial sensors.
High Resolution and Stability
12‑bit resolution delivers fine granularity for accurate process control and system feedback.
Industrial‑Grade Design
Designed to operate reliably in harsh automation environments with robust electrical characteristics and broad operating conditions.
Simple Integration and Wiring
Removable terminals and standard DIN‑rail mounting make installation and maintenance straightforward.
Technical FAQs
1. How many analog inputs does the TM3AI2H support?
It supports two analog input channels.
2. What types of input signals are compatible?
It accepts both 0–10 V DC voltage signals and 0–20 mA / 4–20 mA current signals.
3. What resolution does the module use?
The module operates with 12‑bit resolution for accurate signal conversion.
4. What controllers can this module connect to?
It is designed for use with Modicon TM3 logic controller families.
5. How is the module mounted?
Standard DIN‑rail or symmetrical rail mounting is supported.
6. Can it be used in industrial environments with noise?
Yes, it has high common‑mode rejection and industrial‑grade design for noise resilience.
7. What is the typical sampling rate?
Sampling time is approximately 10 ms per active channel.
8. Does it require a specific supply voltage?
Yes, it operates on a 24 V DC supply.
9. What is the operating temperature range?
Rated for 0°C to 60°C industrial conditions.
10. Can it be hot‑swapped?
Hot‑swap capability depends on the controller’s support for live I/O replacement.
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