Siemens SM 1231 – 4‑Channel Analog Input Module for S7‑1200 (6ES7231‑4HD32‑0XB0)

Brand
SIEMENS
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  • Provides 4 differential analog inputs, configurable for ±10?V, ±5?V, ±2.5?V voltage ranges or 0–20?mA / 4–20?mA current inputs.
  • High-precision input resolution of 13 bits (12-bit + sign) for accurate analog signal acquisition.
  • Supports both voltage and current sensors such as temperature transmitters, pressure sensors, and flow devices.
  • Low power consumption: approx. 1.5 W, with current draw of ~80?mA (5 V) and ~45?mA (24 V) via backplane.
  • Part of the SIMATIC S7-1200 family – compatible with all standard CPUs and used in industrial automation, process control, and remote I/O applications.
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Description
Attribute Details
Product Type Analog Input Module (SM 1231)
Part Number 6ES7231-4HD32-0XB0
Number of Inputs 4 analog inputs
Input Type Differential (±10 V / ±5 V / 0–20 mA / 4–20 mA)
Resolution 13-bit (12-bit + sign)
Input Accuracy Approx. ±0.1%
Power Supply Via backplane (5 V: ~80 mA, 24 V: ~45 mA)
Power Loss Approx. 1.5 W
Mounting DIN-rail
Dimensions (W×H×D) 45 × 100 × 75 mm
Protection Rating IP20
Operating Temp. –20 °C to +60 °C
Storage Temp. –40 °C to +70 °C
Weight Approx. 180 g
LED Diagnostics Yes
Certifications CE, UL, RoHS, REACH

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