PLC | Siemens | 6ES7231-5QD32-0XB0 S7-1200 Analog input SM 1231 6ES7 231-5QD32-0XB0

Product Description: 6ES7231‑5QD32‑0XB0

The 6ES7231‑5QD32‑0XB0 is an 8‑channel RTD analog‑input module for the SIMATIC S7‑1200 PLC family. It measures resistance temperature detectors such as Pt100, Pt1000, Ni100, and Ni1000 in 2‑, 3‑, or 4‑wire circuits, delivering high‑resolution, low‑noise temperature acquisition for compact automation systems. The module snaps directly onto the S7‑1200 rail beside the CPU, draws power from the backplane, and is fully configurable in TIA Portal.

Key Features

• 8 isolated RTD inputs with 15‑bit (0.1 °C typical) resolution
• Supports Pt100, Pt1000, Ni100/1000, Cu10 – selectable per channel
• 2‑, 3‑, or 4‑wire connection with automatic lead‑wire compensation
• Diagnostic functions: open‑circuit, short‑circuit, out‑of‑range alarm
• Channel‑by‑channel parameterization (filter time, limits, scaling)
• LEDs per channel for status and fault indication

Technical Specifications

• Channels: 8 RTD inputs
• Sensor Types: Pt100, Pt1000, Ni100, Ni1000, Cu10
• Wiring Modes: 2‑/3‑/4‑wire (selectable)
• Resolution: 15 bits (~0.1 °C @ Pt100)
• Conversion Time: 210 ms per channel (typical)
• Input Range: −200 … +850 °C (Pt100)
• Isolation: 500 V DC between field and backplane
• Power Consumption: 1.5 W (max) from backplane
• Module Width: 45 mm
• Operating Temp.: −20 … +60 °C
• Protection Class: IP20 (cabinet installation)
• Weight: ≈ 200 g

Application Areas

• Precision temperature monitoring in food & beverage, pharma, and HVAC plants
• Machine‑tool thermal management and bearing monitoring
• Energy‑efficient building automation and environmental chambers
• Distributed temperature acquisition on compact OEM machinery

Advantages

• Eight RTD channels in a single 45 mm module maximises I/O density
• High accuracy and wire‑break diagnostics improve process reliability
• Simple snap‑fit expansion; no extra wiring for power or bus signals
• Fully integrated into TIA Portal for rapid configuration and maintenance
• Siemens industrial build quality ensures 24/7 operation in harsh environments