PLC | Siemens | 6ES7 231-4HF32-0XB0 S7-1200 Analog input SM 1231 6ES7231-4HF32-0XB0

Product Description: Siemens 6ES7231-4HF32-0XB0

The Siemens 6ES7231-4HF32-0XB0 is an analog input signal module from the SIMATIC S7-1200 series designed specifically for temperature measurement using thermocouples. It offers 8 high-precision analog input channels, each capable of connecting to standard thermocouple types, enabling accurate and stable temperature acquisition across a wide range of industrial applications. Its seamless integration with the S7-1200 platform ensures high performance in compact automation solutions.

Key Features

• 8 analog input channels for thermocouples
• Supports standard TC types: Type B, E, J, K, N, R, S, T
• High measurement accuracy and 15-bit resolution
• Integrated diagnostics and configurable input channels
• Automatic cold junction compensation (CJC)
• Configurable via TIA Portal (STEP 7)
• DIN rail mounting and compact design

Technical Specifications

• Part Number: 6ES7231-4HF32-0XB0
• Number of Inputs: 8
• Supported Sensor Types: Thermocouples (B, E, J, K, N, R, S, T)
• Resolution: 15 bits
• Temperature Measurement Range: Depending on TC type (e.g., –200 °C to +1800 °C)
• Accuracy: ±1% of full scale (typical)
• Conversion Time: Approx. 250 ms per channel
• Cold Junction Compensation: Integrated
• Isolation: Between analog inputs and backplane
• Power Supply: Via backplane from CPU
• Mounting: DIN rail
• Dimensions (W × H × D): 70 mm × 100 mm × 75 mm
• Weight: Approx. 200 g
• Protection Class: IP20
• Operating Temperature: 0 °C to +55 °C
• Storage Temperature: –40 °C to +70 °C
• Certifications: CE, cULus, EAC

Application Areas

• Industrial temperature monitoring and control
• Process automation involving heating or cooling systems
• Food, pharmaceutical, and chemical industries
• Manufacturing lines requiring thermal profiling
• Compact and scalable automation solutions with S7-1200

Advantages

• Enables direct connection of thermocouples to the PLC
• Provides accurate and reliable temperature input signals
• No need for external temperature transmitters
• Seamless integration with TIA Portal for fast engineering
• Compact module design fits within space-limited control cabinets