Description
The Siemens 6ES7231-5ND32-0XB0, part of the SIMATIC S7-1200 SM 1231 module family, is a high-precision 4-channel analog input module designed to enhance the signal processing capabilities of S7-1200 PLCs. It accepts both differential voltage and current signals, supporting a wide range of input types including ±10 V, ±5 V, ±2.5 V, ±1.25 V, and 0–20 mA / 4–20 mA, making it suitable for sensors, transmitters, and process monitoring.
With a 15-bit + sign resolution, configurable smoothing, and interference suppression, it delivers stable and accurate measurements even in electrically noisy environments. The module features fast conversion with a cycle time of up to 100 μs for all channels, ensuring real-time responsiveness in control systems.
It includes comprehensive diagnostic features such as wire-break detection, supply monitoring, and LED status indication, increasing system reliability and simplifying troubleshooting. Designed for industrial robustness, the module supports operation from –20°C to 60°C, carries global approvals, and fits seamlessly into S7-1200 modular PLC setups.
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