Schneider TM3AI2H 2-Channel Analog Input Module TM3 Series

TM3AI2H Schneider Modicon TM3 Analog Input Module

The TM3AI2H is a 2-channel high-resolution analog input module for Schneider Electric Modicon TM3 systems. It reads ±10 V, 0-10 V, 0-20 mA, and 4-20 mA signals. Each channel is software configurable. The module delivers true 16-bit resolution (15 bits + sign). It suits precise measurement tasks on Modicon M221, M241, M251, and M262 PLCs.

Oiltech Controls Review

Oiltech Controls supplies tested TM3AI2H modules for industrial users. Every unit is verified before shipment. We support legacy and active Modicon platforms. Our team helps you match the right analog input module to your PLC. We ship worldwide by FedEx, UPS, and DHL.

Oiltech Controls’s Insight

The TM3AI2H fits applications that need stable analog measurement. Its 16-bit resolution helps detect small signal changes. The 4-20 mA mode resists electrical noise over long cable runs. Use it for pressure, flow, temperature, and position feedback. It is a strong choice for machine builders and retrofit projects.

Suitable Equipment

• Modicon M221 logic controllers
• Modicon M241 and M251 PLCs
• Modicon M262 motion controllers
• Modicon TM3 expansion racks
• Process skids and test benches
• Legacy panels needing analog upgrades

Technical Specifications

• Brand: Schneider Electric
• Model: TM3AI2H
• Series: Modicon TM3
• Module Type: Analog input, high resolution
• Channels: 2, software configurable
• Signal Types: ±10 Vdc, 0-10 Vdc, 0-20 mA, 4-20 mA
• Resolution: 16 bits (15 bits + sign)
• Accuracy: ±0.1% FS at 25 °C; ±1% FS over temperature
• Isolation: 500 V AC input to logic; 1500 V AC input to supply
• Conversion Time: 1 ms + 1 ms per channel + 1 controller cycle
• Sampling: 1 ms per channel
• Wiring: Removable screw terminal block, 3.81 mm pitch
• Supply Voltage: 24 Vdc via TM3 bus
• Bus Current: 40 mA at 5 Vdc; 25 mA at 24 Vdc at full load
• Operating Temperature: 0 to +55 °C
• Storage Temperature: -25 to +70 °C
• Protection Rating: IP20
• Dimensions: 90 × 23.6 × 70 mm
• Weight: 0.115 kg

Installation Notes

• Snap the module onto the TM3 bus rail.
• Use shielded twisted-pair cable for analog signals.
• Keep analog wiring away from motor and drive cables.
• Tighten screw terminals to the rated torque.
• Confirm the 24 Vdc supply is stable and clean.
• Set channel mode in the PLC software before startup.

Diagnostics and Maintenance

• Check channel status, module status, and bus status LEDs.
• Verify readings with a calibrated signal source.
• Inspect terminal blocks for loose or oxidized wires.
• Log temperature drift in high-accuracy loops.
• Replace faulty modules with tested spares.

Why Buy From Oiltech Controls?

• Over 15 years in industrial automation spare parts.
• Worldwide shipping by FedEx, UPS, and DHL.
• Tested surplus and refurbished options in stock.
• 12-month warranty on eligible modules.
• Technical verification before every shipment.
• Support for obsolete and legacy control systems.
• Fast dispatch in 24-28 hours after order confirmation.

Email info@oiltechcontrols.com or message +86 158 8020 0923 on WhatsApp.

FAQ

Q: Can the TM3AI2H read both voltage and current on the same module?

A: Yes. You can set each channel for ±10 V, 0-10 V, 0-20 mA, or 4-20 mA in software.

Q: How does the 16-bit resolution help real measurements?

A: It resolves smaller signal steps. This helps detect slow pressure or flow changes in process loops.

Q: Which PLCs support this module in practice?

A: It works with Modicon M221, M241, M251, and M262 controllers with TM3 expansion support.

Q: What should I check before buying a used TM3AI2H?

A: Confirm channel count, signal mode, firmware compatibility, and terminal block condition. Ask for a test report.

Q: How do I choose between 0-20 mA and 4-20 mA wiring?

A: Use 4-20 mA for long cable runs and noise rejection. Use 0-20 mA only when the transmitter requires it.

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