Schneider Electric TM3TI4 Modicon TM3 Analog Input Module

Model: TM3TI4
Brand: Schneider Electric
Series: Modicon TM3
Core Function: 4-channel analog input expansion module designed for temperature and process signal acquisition. Supports voltage, current, thermocouple, and RTD inputs with high resolution for Modicon M221, M241, M251, and M262 logic controllers.
HS Code: 8538.90 (Parts suitable for use solely or principally with apparatus of heading 8535, 8536 or 8537)

Product Parameters

Parameter	Specification
Product Type	Analog Input Expansion Module
Number of Inputs	4 channels
Input Types	Voltage: 0…10 V, –10…+10 V Current: 0…20 mA, 4…20 mA Thermocouple: K, J, R, S, B, E, T, N, C RTD (3-wire): PT100, PT1000, NI100, NI1000
Resolution	16 bits or 15 bits + sign (65536 points)
Accuracy	±0.2% of full scale (typical at 25 °C for voltage/current)
Power Supply	24 V DC (20.4…28.8 V DC)
Current Consumption	Approx. 40 mA (5 V bus) / 35–40 mA (external 24 V)
Connection Type	Removable screw terminal block
Isolation	Input to supply: 1500 V AC Input to logic: 500 V AC
Compatible Controllers	Modicon M221, M241, M251, M262
Mounting	DIN rail (TM3 bus connection)
Protection Degree	IP20
Operating Temperature	–10…+55 °C (horizontal), –10…+35 °C (vertical)
Dimensions (W × H × D)	Approx. 23.6 × 90 × 70 mm
Weight	Approx. 110 g

Advantages and Features

Versatile multi-signal support: voltage, current, thermocouple, and RTD on the same module
High 16-bit resolution for accurate temperature and process measurement
Easy expansion of Modicon M2xx controllers via the TM3 bus
Removable screw terminals for convenient wiring and maintenance
Compact design that saves panel space
Integrated diagnostics and status LED (PWR)
Seamless configuration in EcoStruxure Machine Expert / SoMachine software
Cost-effective solution for multi-channel temperature monitoring applications

Application Cases in Application Fields

Temperature monitoring in packaging and plastics machinery
Process temperature control in food & beverage equipment
HVAC and building automation temperature acquisition
Industrial ovens, furnaces, and heat treatment systems
Machine automation requiring multiple thermocouple or RTD inputs
OEM machine builders using Modicon M221 / M241 / M251 / M262 platforms
Retrofit projects needing additional analog temperature channels

Comparisons with Competing Products

Aspect	Schneider TM3TI4	Standard Analog Input Modules	High-End Temperature Modules
Input Flexibility	Voltage + Current + Thermocouple + RTD	Usually voltage/current only	Specialized temperature only
Channel Count	4	2–8	4–8
Resolution	16-bit	12–16 bit	16-bit or higher
Controller Compatibility	Native Modicon TM3 bus	May require adapters	Platform-specific
Ease of Use	Plug-and-play with EcoStruxure	Varies	Advanced configuration
Best For	Multi-signal temperature applications	Simple process signals	High-precision temperature systems

Selection Suggestions and Precautions

Selection Suggestions:

Choose TM3TI4 (screw terminals) for standard wiring; select TM3TI4G if spring terminals are preferred.
Ideal when you need a mix of voltage/current and temperature (thermocouple/RTD) inputs on one module.
Confirm total TM3 expansion module limit of the host controller (M221/M241/M251/M262).
Use shielded twisted-pair cables (max. 30 m recommended) for best accuracy.

Precautions:

Use only isolated thermocouples when required by the application.
Sensor cable shields should be connected to the controller ground.
Do not exceed the rated input ranges (voltage or current overload protection is limited).
Ensure proper 24 V DC power supply quality and grounding.
Configure each channel correctly in the programming software (input type, range, filter, etc.).
Observe ambient temperature limits, especially for vertical mounting.
Follow Schneider Electric wiring and installation guidelines for reliable operation.