Siemens S7-300 SM331 AI 8x12 Getting Started Guide – Thermocouple Section

About this manual

This guide provides step‑by‑step instructions for installing and configuring the Siemens SM331 AI 8x12 analog input module in a SIMATIC S7‑300 system. It includes mechanical setup, electrical wiring, SIMATIC Manager configuration, and testing of user programs.

The document is aimed at beginners with basic automation experience and contains safety notices, required hardware and software lists, and detailed diagrams for both internal and external reference junction thermocouple connections. This manual is written in Chinese.

What's inside

• Foreword
• Prerequisites
• Tasks
• Mechanical Setup of Test Station
• Electrical Connection of Test Station
• SIMATIC Manager Configuration
• Testing User Program
• Diagnostic Interrupts
• Hardware Interrupts
• Appendix

Specifications

Frequently asked questions

What does the warning triangle symbol indicate?

The warning triangle marks a personal safety alert, meaning the instruction relates to potential personal injury.

Which hardware components are supplied with the SM331 module?

The delivery includes the SM331 module itself and a front connector for power and data connections.