TM3TI4 | Schneider Analog Input Module for Modicon M221/M241/M251/M262

What Is the TM3TI4?

When you need reliable analog input monitoring in a compact form factor, the TM3TI4 from Schneider Electric delivers. This Modicon TM3 analog input module accepts current (0–20 mA, 4–20 mA), voltage (0–10 V, -10 to 10 V), thermocouple (types J, K, R, S, B, T, N, E, C), and temperature probes (Ni100, Ni1000, Pt100, Pt1000). It operates on a 24 VDC supply and integrates seamlessly with Modicon M221, M241, M251, and M262 controllers.

Key Features & Technical Specs

• Four analog/temperature inputs with 16-bit resolution (15 bits + sign).
• Input impedance: ≤50 Ω for current, ≥1 MΩ for voltage, thermocouple, and temperature probe.
• Conversion time: 10 ms + 10 ms per channel for voltage/current; 100 ms + 100 ms per channel for thermocouple and temperature probe.
• Absolute accuracy error: ±0.2% of full scale at 25°C for voltage/current inputs.
• Supply voltage: 24 VDC (limits 20.4–28.8 V).
• Power consumption: 45 mA at 5 VDC via bus connector, 35 mA at 24 VDC via external supply.
• Mounting on TH35-15 or TH35-7.5 DIN rail, or panel with fixing kit.
• Dimensions: 90 mm height, 70 mm depth, 23.6 mm width; net weight 0.11 kg.
• IP20 protection, pollution degree 2.

Real-World Applications

In process control and machine monitoring, the TM3TI4 excels at reading temperature from thermocouples or RTDs, as well as standard analog signals. For example, a packaging line can use the module to monitor heater temperature via a type K thermocouple, ensuring consistent seal quality. Its 16-bit resolution provides the precision needed for accurate data logging and closed-loop control.

Installation & Setup

Mount the TM3TI4 on a standard DIN rail (TH35-15 or TH35-7.5) or a panel using the optional fixing kit. Use twisted shielded pairs for input wiring, keeping cable runs under 30 meters to minimize noise. Connect the 24 VDC supply to the removable screw terminal block (10 x 1.5 mm², 3.81 mm pitch). The module automatically powers up when connected to the Modicon bus.

Maintenance & Reliability

Routine inspection of the TM3TI4 should focus on verifying the green PWR LED and checking for loose connections. The module operates reliably from -10°C to 55°C (horizontal) or -10°C to 35°C (vertical), with storage from -25°C to 70°C. Its immunity to electrostatic discharge (8 kV air, 4 kV contact) and fast transients (1 kV) ensures stable performance in industrial environments.

Compatibility & Integration

The TM3TI4 is designed for Modicon M221, M241, M251, and M262 controllers. It communicates via the backplane bus, requiring no external wiring for data exchange. The module supports both current and voltage inputs, making it versatile for various sensor types. For thermocouple and RTD measurements, the built-in cold junction compensation and linearization simplify programming.

Common Questions About the TM3TI4

Q: What is the input resolution of the TM3TI4?

A: The module offers 16-bit resolution (15 bits + sign) for all analog inputs.

Q: Can the TM3TI4 measure temperature directly?

A: Yes, it supports thermocouple types J, K, R, S, B, T, N, E, C and RTD probes (Pt100, Pt1000, Ni100, Ni1000).

Q: What is the supply voltage range?

A: The rated supply is 24 VDC, with limits of 20.4 to 28.8 VDC.

Q: How do I mount the module?

A: It mounts on a TH35-15 or TH35-7.5 DIN rail, or on a panel with the optional fixing kit.

Q: What certifications does the TM3TI4 have?

A: It carries CE, UKCA, RCM, EAC, cULus, and cULus HazLoc marks.

Product Support & Availability

The TM3TI4 is in stock and ready to ship from Petro Auto Tech. As a trusted industrial automation parts supplier, we ensure fast delivery and reliable service. Contact our team for pricing and lead times.