PLC | Siemens | 6ES7 231-5QF32-0XB0 S7-1200 Analog input SM 1231 6ES7231-5QF32-0XB0

Product Description: 6ES7231-5QF32-0XB0

The 6ES7231-5QF32-0XB0 is an 8-channel thermocouple input module for the SIMATIC S7-1200 PLC family. It supports direct connection of standard thermocouple types (B, E, J, K, N, R, S, T) in 2-wire mode, providing high- resolution temperature measurement (16-bit) with cold-junction compensation. Snap-on mounting beside the CPU draws power and communication through the backplane, enabling compact and precise temperature acquisition in food, pharmaceutical, HVAC, or OEM applications.

Key Features

• 8 isolated thermocouple inputs, 2-wire
• Supports B, E, J, K, N, R, S, T types per channel
• 16-bit resolution (~0.1 °C) with built-in cold-junction compensation
• Per- channel diagnostics: open-circuit detection and range error
• Configurable filter time, scaling, and limits in TIA Portal
• Status LEDs for each channel and module health

Technical Specifications

• Input Range: Depends on TC type (e.g. –200…+1372 °C for K)
• Resolution & Accuracy: 16-bit; ±0.1 % of full scale
• Conversion Time: ~200 ms per channel
• Isolation: 500 V DC channel-to-backplane
• Power Consumption: 1.5 W from backplane
• Module Width: 45 mm
• Operating Temp.: –20 … +60 °C
• Protection Class: IP20 (cabinet mount)
• Weight: ≈ 180 g

Application Areas

• Multi-point temperature monitoring in processing plants
• Oven and furnace control for plastics, ceramics, or metal
• Food and beverage production lines
• Environmental chambers and HVAC control
• OEM machinery requiring integrated TC inputs

Advantages

• High channel count in a slim footprint maximizes panel density
• Direct TC connection eliminates need for external transmitters
• Built-in compensation and diagnostics ensure measurement integrity
• Seamless configuration and maintenance via TIA Portal
• Siemens industrial build quality for reliable 24/7 operation