Schneider TM3AI4 Analog Input Module 4 Channels

Buy TM3AI4 | Modicon TM3 4-Channel Analog Input Module

Product Introduction

The TM3AI4 analog input module expands the Modicon TM3 controller family with four versatile analog channels. Schneider Electric engineered this module to accept both voltage and current signals, covering standard industrial ranges including -10 to 10 V, 0 to 10 V, 0 to 20 mA, and 4 to 20 mA. Therefore, it serves as an ideal solution for connecting sensors, transmitters, and other analog field devices to your control system.

This input module stands out due to its impressive resolution and speed. The TM3AI4 offers 11-bit plus sign resolution for voltage inputs and 12-bit resolution for current inputs. Additionally, the conversion time reaches only 1 ms plus 1 ms per channel, ensuring responsive data acquisition for time-critical applications. The module also features a screw terminal block for secure and reliable wiring connections.

Compatibility and System Integration

The TM3AI4 integrates seamlessly with the Modicon TM3 controller family. It offers full compatibility with Modicon M221, M241, and M251 logic controllers. This flexibility allows you to use the same analog input module across different controller platforms within the TM3 ecosystem. Furthermore, the module communicates with the controller via the bus connector, simplifying system assembly and reducing wiring complexity.

Technical Specifications

Focusing on input performance, the TM3AI4 accepts both voltage and current signals across multiple ranges. For voltage inputs, the module supports -10 to 10 V and 0 to 10 V ranges. For current inputs, it handles 0 to 20 mA and 4 to 20 mA ranges. The input impedance measures 50 Ω for current inputs and at least 1 MΩ for voltage inputs, ensuring minimal loading on your signal sources.

The resolution details are as follows: for the 0 to 10 V range, the LSB value is 2.44 mV; for the -10 to 10 V range, it is 4.88 mV. For current inputs, the LSB value is 4.88 µA for the 0 to 20 mA range and 3.91 µA for the 4 to 20 mA range. Moreover, the absolute accuracy reaches +/-0.1% of full scale at 25 °C, with a temperature drift of only +/-0.006% FS/°C. The repeat accuracy is +/-0.5% of full scale, and non-linearity stays within +/-0.01% FS.

The TM3AI4 permits permanent overload up to 13 V for voltage inputs and 40 mA for current inputs, protecting the module from accidental over-ranging. The conversion time is 1 ms plus 1 ms per active channel plus one controller cycle. Sampling time is less than or equal to 1 ms, ensuring timely data updates for your control loops.

Electrical and Isolation Characteristics

Power supply requirements for the TM3AI4 include a 24 V DC external supply with limits of 20.4 V to 28.8 V. Current consumption is 35 mA at 5 V DC (no load) and 45 mA at 5 V DC (full load) via the bus connector, plus 30 mA at 24 V DC via the external supply. Local signalling is provided by a green PWR LED for power status indication.

Isolation is robust. The TM3AI4 provides 500 V AC isolation between input and output, and 1500 V AC isolation between inputs and power supply. This design protects your controller from potential ground loops and voltage transients. The module also carries CE marking, confirming compliance with European safety and EMC standards.

Mechanical and Environmental Parameters

The TM3AI4 features a slim design, measuring 23.6 mm in width, 70 mm in depth, and 90 mm in height. It weighs only 0.11 kg, making it ideal for space-constrained panels. Mounting options include TH35-15 or TH35-7.5 DIN rails conforming to IEC 60715, or panel mounting with an optional fixing kit.

The module operates within a temperature range of -10 to 55 °C for horizontal installation and -10 to 35 °C for vertical installation. Storage temperature ranges from -25 to 70 °C. Relative humidity tolerance is 10 to 95% without condensation in operation and storage. The IP20 protection degree ensures safe installation in typical control cabinets.

Environmental compliance is confirmed by Schneider's Green Premium status. The TM3AI4 contains no SVHC above the threshold and meets REACH and RoHS requirements. The warranty period is 18 months.

Installation Guidelines

Proper installation ensures optimal performance of the TM3AI4. Begin by securely mounting the module on a DIN rail or panel surface. The screw terminal block accepts up to 10 wires of 1.5 mm² cross-section with a 3.81 mm pitch. For signal wiring, use twisted shielded cables with a maximum length of 30 meters to maintain signal integrity.

When connecting inputs, ensure correct polarity for both voltage and current signals. For current inputs, the module requires the loop power to be supplied externally. For voltage inputs, the signal source should have low output impedance for accurate measurement. Additionally, avoid routing analog signal wires parallel to high-voltage or high-current cables to prevent noise coupling.

Packaging List

Your shipment of the TM3AI4 includes the following items:

• Analog input module TM3AI4 (1 unit)

• Screw terminal block (1 piece, pre-attached)

• DIN rail mounting clip (factory-installed)

• Quick-start installation leaflet

Note: Cables, sensors, and panel mounting hardware are sold separately.

Shipping and Logistics

All orders are dispatched through premium carriers such as FedEx, UPS, and DHL. We ensure robust packaging to protect your module during transit. Tracking information will be provided once your order ships.

Frequently Asked Questions (FAQ)

1. What signal ranges does the TM3AI4 support?
The TM3AI4 supports voltage ranges of -10 to 10 V and 0 to 10 V, and current ranges of 0 to 20 mA and 4 to 20 mA. Each channel can be configured independently.

2. What resolution does this module provide?
For voltage inputs, the resolution is 11 bits plus sign. For current inputs, the resolution is 12 bits. The LSB values vary by range as detailed in the specifications.

3. How fast is the conversion time?
The conversion time is 1 ms plus 1 ms per active channel plus one controller cycle. Sampling time is less than or equal to 1 ms.

4. Can I use this module with Modicon M221 controllers?
Yes, the TM3AI4 is fully compatible with Modicon M221, M241, and M251 controllers within the TM3 family.

5. What cable type is recommended for wiring?
Use twisted shielded cables for analog signal wiring. The maximum cable length is 30 meters to ensure accurate signal transmission.