This document is an overview of the SIMATIC S7-300 components by Siemens. The product is a modular small to medium-sized PLC system suitable for applications with medium performance requirements. It features a simple and practical decentralized structure with multi-interface networking capabilities, making it highly flexible for various control tasks. The product is user-friendly with a fanless design and expandability. The document provides details about the features and functions of the different components and modules.
This manual describes the modular structure of the SIMATIC S7-300 programmable controller, its various CPU, I/O, and communication modules, and how they can be combined for flexible system design. It explains installation on DIN rail, wiring methods, and the use of backplane bus connectors.
The document also covers communication technologies such as MPI, PROFIBUS‑DP, AS‑i and industrial Ethernet, diagnostic functions, temperature specifications, and expansion capabilities with up to three additional rack extensions. This manual is written in Chinese.
| Standard temperature range | 0 °C to 60 °C |
|---|---|
| Extended temperature range | -25 °C to (unspecified upper limit) |
| Power supply voltage | 120 V / 230 V AC |
| MPI communication speed | 12 Mbit/s |
The standard S7-300 operates from 0 °C up to 60 °C.