Schneider Electric TM2AMM3HT Analog Input Module | Replacement, Equivalent & Selection Guide
Technical Specifications
- Part Number: TM2AMM3HT
- Manufacturer: Schneider Electric
- Series: Modicon TM2 Expansion I/O
- Compatible Controllers: Modicon M238, M221, M241, M251
- Analog Input Channels: 3 channels (2 × current/voltage + 1 × thermocouple/temperature)
- Input Signal Types: 0–10 V, 0–20 mA, 4–20 mA, thermocouple (J, K, R, S, B, E, T, N)
- Resolution: 12-bit (0–4095)
- Conversion Time: ≤ 1 ms per channel
- Power Supply: 5 VDC via bus connector (from controller)
- Operating Temperature: 0 °C to +55 °C
- Storage Temperature: −25 °C to +70 °C
- Protection Rating: IP20
- Mounting: DIN rail (35 mm), snap-on to controller or expansion bus
- Dimensions (W × H × D): 27.4 × 90 × 70 mm
- Weight: 85 g
- Certifications: CE, UL, cUL, RoHS
- Communication: TM2 expansion bus (proprietary, direct plug-in)
Compatible Replacement & Equivalent Models
When the TM2AMM3HT is unavailable or under evaluation, engineers consider the following alternatives. Always verify electrical and firmware compatibility before substitution.
- TM2AMI2HT — 2-channel analog input (voltage/current only, no thermocouple); direct TM2 bus replacement with reduced channel count
- TM3AI4 — 4-channel analog input for Modicon M241/M251/M262; requires TM3 bus adapter (TMBSEND) for M238 use
- TM3AI8 — 8-channel analog input, TM3 series; higher density alternative for larger I/O requirements
- TM2AMI2HT + TM2AVO2HT — Combined pair to replicate mixed current/voltage + temperature functionality
- Siemens SM 1231 AI — S7-1200 series analog input; cross-brand alternative requiring full controller migration
- Mitsubishi FX5-4AD — MELSEC iQ-F series; cross-brand, 4-channel, suitable for migration projects
Note: Cross-brand replacements require controller, software, and wiring changes. Consult Konmask engineering support for migration assistance.
Why Choose the Original Model
- Thermocouple Support Built-In: The HT suffix indicates high-temperature thermocouple input — a unique feature not present in standard TM2AMI2HT variants, eliminating the need for a separate temperature module
- Plug-and-Play Expansion: Snaps directly onto Modicon M238/M221 without additional bus adapters or wiring harnesses
- Compact Footprint: 27.4 mm width saves panel space versus adding two separate modules
- Native SoMachine/EcoStruxure Integration: Auto-detected by Schneider programming software with pre-built function blocks
- Proven Field Reliability: Widely deployed in food processing, HVAC, and water treatment applications globally
- Single SKU Simplicity: One part number covers voltage, current, and thermocouple inputs — simplifying BOM and spares inventory
Typical Applications
- HVAC Systems: Monitoring supply air temperature via thermocouple + duct pressure via 4–20 mA transmitter on a single module
- Food & Beverage Processing: Oven temperature control (thermocouple channel) combined with flow rate monitoring (current input)
- Water & Wastewater Treatment: pH sensor (0–10 V), flow meter (4–20 mA), and temperature probe inputs on one compact module
- Plastics & Rubber Machinery: Barrel temperature monitoring with thermocouple + hydraulic pressure feedback via current loop
- Building Automation: Multi-zone temperature sensing integrated with BMS via Modicon M221 controller
- Energy Monitoring Panels: Analog transducer inputs for power, current, and temperature in compact MCC panels
System Compatibility
- Directly Compatible Controllers: Modicon M238, M221 (all variants)
- Compatible via TM3 Bus Adapter: Modicon M241, M251, M262 (requires TMBSEND adapter)
- Programming Software: SoMachine V4.x, EcoStruxure Machine Expert V1.x and later
- Maximum Expansion Modules per Controller: Up to 7 TM2 modules on M238; check controller datasheet for M221 limits
- Bus Position: Any slot in the TM2 expansion chain; no fixed slot requirement
- Not Compatible With: Modicon M340, M580, Quantum, Premium series (different bus architecture)
Selection Guide
Use this guide to confirm TM2AMM3HT is the right module for your application:
- Step 1 — Controller Check: Confirm your PLC is Modicon M238 or M221. If M241/M251, consider TM3AI4 with adapter.
- Step 2 — Channel Count: Need 3 or fewer analog inputs? TM2AMM3HT is optimal. Need 4+? Evaluate TM3AI4 or TM3AI8.
- Step 3 — Signal Types: Require thermocouple input? TM2AMM3HT (HT suffix) is the only TM2 module with this capability. Voltage/current only? TM2AMI2HT may suffice.
- Step 4 — Panel Space: DIN rail space ≤ 30 mm available? TM2AMM3HT at 27.4 mm fits; TM3 modules are wider.
- Step 5 — Software Version: Verify SoMachine ≥ V4.1 or EcoStruxure Machine Expert ≥ V1.0 for full thermocouple function block support.
Quality Assurance & Sourcing
- All TM2AMM3HT units sourced by Konmask.com are genuine Schneider Electric components from authorized distribution channels
- Each unit undergoes incoming inspection: label verification, firmware version check, and packaging integrity review
- Traceability documentation (batch/lot records) available upon request for MRO and OEM customers
- Anti-counterfeit verification: holographic Schneider Electric labels and factory serial number validation
- Warranty: 12 months from shipment date; DOA replacement within 7 business days
How to Order
- Part Number: TM2AMM3HT
- Minimum Order Quantity: 1 unit
- Lead Time: In-stock items ship within 1–3 business days; contact us for bulk order scheduling
- Quote Request: Email [email protected] with quantity and delivery location
- Phone / WhatsApp: +0086 19859288691
- Export: Available for international shipment; DDP/DAP terms negotiable for orders ≥ 10 units
Replacement & Compatibility FAQ
Q: Can TM2AMM3HT replace TM2AMI2HT directly?
A: Partially. TM2AMI2HT has 2 voltage/current channels only. TM2AMM3HT adds a third thermocouple channel. If your application uses only voltage/current, TM2AMI2HT is a functional substitute; if thermocouple input is used, it is not interchangeable.
Q: Is TM2AMM3HT compatible with Modicon M241?
A: Not directly. M241 uses the TM3 expansion bus. You would need a TMBSEND adapter to connect TM2 modules, or switch to TM3AI4 for a native fit.
Q: Can I use a third-party analog input module as a drop-in replacement?
A: No. The TM2 bus is a proprietary Schneider Electric interface. Only genuine TM2-series modules are electrically and protocol-compatible without hardware modification.
Q: What is the difference between TM2AMM3HT and TM2AMM3HT1?
A: The suffix “1” typically denotes a regional or packaging variant. Core electrical specifications are identical; confirm with Schneider Electric or Konmask for your specific region.
Q: How many TM2AMM3HT modules can I add to one M238 controller?
A: Up to 7 TM2 expansion modules total per M238 controller, across all module types combined.
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