6ES7231-5PD32-0XB0

Siemens 6ES7231-5PD32-0XB0 – high-precision analog input module for S7-1200 automation systems
The Siemens 6ES7231-5PD32-0XB0, belonging to the SM 1231 RTD signal module family, is designed for use in S7-1200 automation controllers. It provides 4 analog inputs configured for resistance thermometer sensors (RTD) such as Pt100, Ni1000, Cu10 and others, enabling accurate temperature measurement in industrial environments. The module is powered by 24 V DC and features a compact form with low power consumption (typical 40 mA) and nominal power loss of approximately 1.5 W.
Key features and benefits
Precision temperature measurement

• Supports common RTD sensor types (Pt, Ni, Cu) with input resistances options of 150 Ω, 300 Ω or 600 Ω.

• High resolution (15-bit plus sign) and high repeat accuracy (~±0.05% of output range) enable reliable measurement. 
  Industrial design and connectivity

• Suitable for backplane bus connection in S7-1200 racks; typical current consumption 40 mA + 80 mA from 5 V backplane.

• Compact dimensions approx. 45 × 100 × 75 mm and mounting on standard DIN rail systems. 
  Easy system integration

• Designed for seamless integration into S7-1200 automation systems to expand RTD input capability without adding external modules or controllers.
  Where is the Siemens 6ES7231-5PD32-0XB0 used?

• Temperature monitoring and control in production lines, heating/cooling systems and process automation using S7-1200 controllers.

• Sensor integration for equipment requiring direct RTD input (e.g., machine tools, industrial ovens, HVAC systems).

• Retrofits or upgrades in existing S7-1200 installations where additional RTD analog inputs are needed.
  About the manufacturer
  Siemens is a global leader in industrial automation and digitalization. Their SIMATIC S7-1200 series, including the SM 1231 RTD modules such as the 6ES7231-5PD32-0XB0, offer modular, scalable and high-performance automation solutions for modern manufacturing environments.