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SIMATIC S7-300 SM 331, AI 8x13 bit
SKU: 6ES7331-1KF02-0AB0
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Short Description
Description:
The SM 331 module is an 8-channel analog input unit designed for the S7-300 automation system, enabling precise measurement of voltage, current, resistance, and temperature signals.
It’s commonly used in industrial environments for monitoring process variables like temperature, pressure, and flow, especially where RTDs or analog sensors are deployed.
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Specifications:
Channels: 8 isolated analog inputs.
Resolution: 13 bits.
Conversion Time: ~66 ms per channel.
Input Voltage Range: ±10 V, ±5 V, ±1 V, 0–10 V, 1–5 V.
Input Current Range: 0–20 mA, 4–20 mA.
RTD Support: Pt100, Ni100, Ni1000, LG-Ni1000.
Resistance Range: 0–600 Ω and 0–6 kΩ.
Input Protection: 30 V (voltage), 40 mA (current).
Isolation: Yes (channel-to-backplane).
Diagnostics: No onboard diagnostics or alarms.
Power Loss: ~0.4 W.
Bus Current Draw: 90 mA @ 5 V DC.
Dimensions (W×H×D): 40 × 125 × 117 mm.
Connector: 40-pin front connector.
Weight: ~250 g.
Measurement Accuracy:
Voltage:
Typical Error @ 25 °C: ±0.3–0.4%.
Max Error (Full Temp Range): ±0.5–0.6%
Current:
Typical Error @ 25 °C: ±0.3%.
Max Error (Full Temp Range): ±0.5%.
Resistance:
Typical Error @ 25 °C: ±0.3%.
Max Error (Full Temp Range): ±0.5%.
RTD (e.g. Pt100):
Typical Error @ 25 °C: ±0.8–1.2 K.
Max Error (Full Temp Range): ±1–1.2 K.