Description
The Siemens 6ES7231-4HD32-0XB0 is a versatile 4-channel analog input module from the SIMATIC S7-1200 SM 1231 series, designed to provide precise and stable analog signal acquisition for automation systems. Supporting voltage ranges of ±10 V, ±5 V, ±2.5 V and current ranges of 0–20 mA and 4–20 mA, the module is suitable for a wide variety of analog sensors and process signals.
Equipped with a 13-bit ADC (12-bit + sign), it ensures accurate measurement and fast conversion with a cycle time of up to 625 μs across all channels. The module includes configurable filtering and smoothing levels to improve signal quality and minimize noise interference. It also offers strong diagnostics, including wire-break detection, supply monitoring, and LED indicators for input and maintenance status.
With an operating range from –20°C to 60°C, IP20 protection, and global industrial approvals, the SM 1231 AI module is designed for dependable use in demanding automation environments. Compact dimensions (45 × 100 × 75 mm) make it easy to integrate into S7-1200 PLC systems while maintaining flexibility and scalability.
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