TM3AI2H | Schneider Electric 16-Bit Analog Input Module

TM3AI2H: Precision Analog Input for Modicon TM3 Systems

When process signals demand faithful digital representation, conversion quality determines control quality. The Schneider Electric TM3AI2H is a two-channel analog input module from the Modicon TM3 series. It delivers 16-bit resolution across voltage and current signals, making it a precise front end for the M221, M241, M251, and M262 platforms.

Why This Module Fits Precision Control Loops

Each channel is software configurable for ±10 Vdc, 0-10 Vdc, 0-20 mA, or 4-20 mA. Consequently, one module covers mixed sensor inventories without hardware changes. Accuracy is ±0.1% of full scale at 25 °C, with ±1% FS drift over the operating temperature range. For engineers sizing control loops, that figure defines the achievable measurement uncertainty.

TM3AI2H Key Specifications

• Channels: 2 analog inputs, individually configurable
• Resolution: 16 bits (15 bits + sign)
• Signal ranges: ±10 V, 0-10 V, 0-20 mA, 4-20 mA
• Accuracy: ±0.1% FS at 25 °C; ±1% FS over temperature
• Isolation: 500 V AC input-to-logic; 1500 V AC input-to-supply
• Response time: 1 ms conversion + 1 ms per channel + one controller cycle
• Supply: 24 Vdc via TM3 bus; 40 mA at 5 V DC, 25 mA at 24 V DC
• Operating temperature: 0 to +55 °C
• Protection rating: IP20
• Dimensions: 90 × 23.6 × 70 mm; 0.115 kg

Isolation and Diagnostics in Practice

Isolation is a decisive parameter in industrial environments. The TM3AI2H provides 500 V AC between analog inputs and internal logic, plus 1500 V AC between inputs and supply. This separation limits ground-loop interference and protects the controller backplane from field transients. Additionally, channel, module, and bus status diagnostics give maintenance teams early fault visibility.

Applications and Integration

Typical uses include pressure, flow, and temperature transmitters feeding Modicon controllers. The 4-20 mA range suits long cable runs; the ±10 V range serves fast analog sources. Because the module is software configurable per channel, commissioning requires no jumper changes. Wiring uses a removable screw terminal block with 3.81 mm pitch, which simplifies field replacement.

Availability

The TM3AI2H is active and in stock. Contact AutoDCSTech with your exact requirements for precise matching.