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TM3AI8G Schneider Electric
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Product Details
Specifications provided for reference. Verify critical details against official manufacturer documentation before installation.
Product Overview
The TM3AI8G is a Schneider Electric Modicon TM3 series analog input expansion module with eight single-ended analog channels and spring-style removable terminals. It operates as an I/O expansion for Modicon M2xx controller families (e.g., M221, M241, M251, M262), providing measurement of voltage or current signals such as 0…10 V, -10…+10 V, 0…20 mA, 4…20 mA, including extended current ranges. It uses 12-bit (or 11-bit + sign) sigma-delta ADC, suitable for applications requiring multiple analog measurements in compact machine-level control systems. (Part number TM3AI8G)
Best Suited For
- Expansion of Modicon M2xx series PLC analog inputs
- Machine-level analog signal acquisition
- Applications requiring both voltage and current input compatibility
- Compact control panels with spring-clamp wiring
Input channels
8
Resolution
12 bit (or 11 bit + sign)
Signal types
Voltage and current (0…10 V, -10…+10 V, 0…20 mA, 4…20 mA, extended ranges)
Connection type
Spring removable terminal block
Internal supply current
35 mA (5 V bus, no / full load)
Technical Specifications
I/O & Electrical
Analog input channels
8 single-ended
Input ranges
0…10 V, -10…+10 V; 0…20 mA, 4…20 mA; extended 0…20 mA, 4…20 mA
Input impedance
Voltage: ≥ 1 MΩ; Current: ≤ 50 Ω
Sampling time
1 ms per enabled channel
ADC conversion
Sigma-delta
Resolution
12 bit or 11 bit + sign (4096 points)
Accuracy at 25 °C
±0.2 % of full scale
Temperature drift
±0.01 % of full scale
Repeatability
±0.5 % of full scale
Non-linearity
±0.2 % of full scale
Maximum input deviation
±1.0 % of full scale
Noise resistance
±4 % max during EMC disturbance
Crosstalk
≤ 1 LSB
Isolation
1500 VAC (inputs to external supply); 500 VAC (inputs to logic)
Continuous overload
13 V (voltage); 40 mA (current)
Input filter
Software: 0…10 s (10 ms resolution)
Cable
Twisted-pair shielded, ≤ 30 m
Communication & Power
Supply voltage
24 V DC nominal (20.4…28.8 V DC)
Internal 5 V bus current draw
35 mA (no load / full load)
Internal 24 V bus current draw
0 mA
External 24 V DC supply current draw
30 mA (no load), 40 mA (full load)
Status LED
Green PWR LED indicates TM3 bus power presence
Physical & Environmental
Terminal block
Removable spring terminal, 3.81 mm pitch
Weight
~100 g
Dimensions
Approx. 90 mm × 34 mm × 82 mm
Mounting
DIN-rail (TH35-15 or TH35-7.5) or panel with kit
IP rating
IP20
Operating temperature
-10 … 55 °C (horizontal installation)
Storage temperature
-25 … 70 °C
Relative humidity
10 … 95 % (non-condensing)
Operating altitude
0…2000 m
Pollution degree
2
Vibration
3.5 mm (5-8.4 Hz), 3 g (8.4-150 Hz) on DIN rail
Shock
15 g, 11 ms
