Schneider TM3AI4 Analog Input Module

Description

The Schneider Electric TM3AI4 is a compact and reliable analog input module designed to expand the signal-acquisition capabilities of Modicon M221, M241, M251 and M262 controllers. It supports four independent voltage or current inputs, enabling engineers to capture precise process values in demanding industrial environments. The module delivers stable performance with low noise and consistent measurement accuracy, even during continuous operation. Moreover, its modular design allows effortless installation on standard DIN rails, making system expansion fast and predictable for machine builders.

Key Features

• Supports four analog input channels for current or voltage signals

• Provides 12-bit or 11-bit + sign resolution for stable signal processing

• Offers flexible configuration for 0–10 V, ±10 V, 0–20 mA and 4–20 mA inputs

• Ensures robust electrical isolation between input, logic and supply circuits

• Integrates smoothly with EcoStruxure Machine Expert for intuitive setup

• Designed for long-term reliability in harsh industrial conditions

• Enables scalable I/O expansion for Modicon M2xx controllers

Technical Specifications

General

• Product Type: Analog Input Module

• Series: Modicon TM3

• Compatible Controllers: M221, M241, M251, M262

• Input Channels: 4

Input Signal Types

• Voltage: 0–10 V, ±10 V

• Current: 0–20 mA, 4–20 mA

Performance

• Resolution: 12-bit or 11-bit + sign

• Conversion Time: 1 ms + 1 ms/channel + controller cycle

• Impedance: ≥1 MΩ (voltage), ≤50 Ω (current)

• Accuracy: ±0.1% FS at 25°C

• Temperature Drift: ±0.006% FS/°C

• Crosstalk: ≤1 LSB

• Overload Capacity: 13 V (voltage), 40 mA (current)

Electrical

• Supply Voltage: 24 VDC (20.4–28.8 V)

• Current Consumption:

• 35 mA at 5 V (no load)

• 45 mA at 5 V (full load)

• 30 mA at 24 V external supply

• Isolation:

• 1500 VAC (input–supply)

• 500 VAC (input–logic)

Physical & Environmental

• Connection: Removable 3.81 mm screw terminal block

• Dimensions: 23.6 × 70 × 90 mm

• Weight: 0.11 kg

• Protection Rating: IP20

• Operating Temperature: –10…55°C (horizontal)

Typical Applications

The TM3AI4 suits machine automation scenarios requiring precise analog measurement. For instance, integrators can use it to monitor process pressure, temperature transmitters, valve feedback, and general industrial sensors. In addition, its stable acquisition performance helps OEMs build repeatable and scalable control systems for packaging machinery, HVAC equipment, conveyors and small manufacturing cells.

Support & Reliability

The module is built for long operational life with high immunity to electrical interference, ensuring dependable measurements in noisy industrial environments. Furthermore, Schneider Electric provides extensive documentation, firmware updates and global lifecycle services to reduce maintenance downtime.

FAQ

Q1: Can the TM3AI4 mix current and voltage inputs on different channels?
Yes, each channel can be configured independently for voltage or current signals.

Q2: Do I need an external power supply for the analog inputs?
Yes, the module requires an external 24 VDC supply in addition to the 5 V bus power.

Q3: Which software is recommended for configuration?
EcoStruxure Machine Expert provides full configuration, diagnostics and commissioning tools.

Q4: Is the module hot-swappable?
No, the controller must be powered down before adding or removing TM3 modules.

Q5: Can the TM3AI4 handle long cable runs for sensors?
Yes, twisted and shielded cable up to 30 m is supported for stable signal integrity.