TM3TI8T 8-Channel Temperature Input Module TC/RTD/NTC Screw Terminal | Schneider Electric

The Original New Schneider Electric TM3TI8T is an 8‑channel analog input module for the Modicon TM3 I/O system, designed to expand the temperature measurement capability of Modicon M221, M241, M251, and M262 logic controllers. It provides 8 configurable input channels supporting thermocouple (types B, C, E, J, K, N, R, S, T), NTC/PTC thermistor, and resistance (ohmmeter) sensors with 16‑bit resolution (15 bits + sign). A removable screw terminal block ensures secure field wiring. Part of the Modicon TM3 expansion family, it features a simple interlocking assembly mechanism for quick DIN rail mounting.

Core Engineering Highlights:
8 configurable temperature input channels | Thermocouple (B, C, E, J, K, N, R, S, T), NTC/PTC thermistor, and resistance sensors | 16‑bit resolution (15 bits + sign) | 100 ms sampling duration per enabled channel | 1500V AC isolation (external supply to inputs) | Removable screw terminal block (3.81 mm pitch) | IP20 protection | –10°C to +55°C operating temperature | 23.6 mm width | 0.11 kg weight

Key Features:

• Original New Schneider Electric TM3TI8T module

• 8 input channels configurable for thermocouple, thermistor, or resistance measurement

• Supports thermocouple types: B, C, E, J, K, N, R, S, T

• Supports NTC thermistor: 100 Ω…200 kΩ (–90…150 °C)

• Supports PTC thermistor: 100 Ω…10 kΩ

• Supports resistance measurement: 100 Ω…32 kΩ

• 16‑bit resolution (15 bits + sign) for high‑precision measurement

• 100 ms sampling duration per enabled channel

• 1500V AC isolation between external power supply and inputs

• 500V AC isolation between inputs and internal logic circuits

• Input filter configurable: 0…10 s (per 0.01 s unit)

• Removable screw terminal block (10 x 1.5 mm², pitch 3.81 mm)

• Green LED for module power status indication

• Simple interlocking assembly with Modicon TM3 controllers

• DIN rail mounting (35 mm, TH35-7.5 or TH35-15)

• IP20 protection with protective cover in place

• Use only isolated thermocouples

• Cable type: twisted shielded pairs, <30 m

Applications:

• Multi‑zone temperature monitoring with thermocouples or RTD sensors

• Industrial furnace and oven temperature control

• HVAC system temperature measurement

• Machine condition monitoring (bearings, windings, hydraulic systems)

• Process control and data acquisition systems

• OEM equipment requiring Modicon TM3 temperature input expansion

Technical Specifications:

Input Types & Ranges:

Accuracy & Performance:

Power & Physical:

System Compatibility:

• Schneider Electric Modicon M221 logic controllers

• Modicon M241 logic controllers

• Modicon M251 logic controllers

• Modicon M262 logic controllers

• EcoStruxure Machine Expert (formerly SoMachine) programming software

• Modicon TM3 I/O expansion bus

Installation Notes:

• Use only isolated thermocouples

• All shields of sensor cables must be referenced to the logic controller ground

• The module operates in self‑scan mode with Sigma‑Delta ADC conversion

• Thermocouple R and S accuracy: ±6°C at 0…200°C

• Thermocouple B: Not available at 0…300°C

• Thermocouple K, J, E, T, N: ±0.4% of full scale under 0°C

Related Products:

• TM3TI8TG – Spring terminal version of the 8‑input temperature module

• TM3TI4 – 4‑channel temperature input module (screw terminal)

• TM3AI8 – 8‑channel analog input module (voltage/current)

• TM3AQ4 – 4‑channel analog output module

• TM3DI16 – 16‑channel discrete input module

• TM3DQ16T – 16‑channel transistor output module

PLC ERA is an independent industrial automation distributor supplying 100% genuine Original New products through established global supply channels. All products are factory sealed when applicable and undergo quality inspection prior to shipment. Schneider Electric, Modicon, and EcoStruxure are trademarks of Schneider Electric SE.