The document introduces the SIMATIC S7-300 and S7-300F programmable logic controllers, describing their modular architecture, CPU families, and a wide range of I/O, analog, and communication modules. It also outlines safety‑related features and the environmental conditions the controllers are designed for.
Technical specifications such as protection class, operating temperature ranges, power supply requirements, and test voltages are listed, along with details on accessories like DIN‑rail mounts and labeling materials. The manual serves as a reference for installation, configuration, and maintenance of the S7-300 series in industrial automation applications. This manual is written in Chinese.
| Protection class | IP20 |
|---|---|
| Horizontal installation temperature range | -25°C to +70°C |
| Vertical installation temperature range | -25°C to +50°C |
| Test voltage for 24VDC circuit | 500 VDC |
| Relative humidity range | 5% – 95% |
The S7-300 has a protection class of IP20.
It can operate from –25 °C up to +70 °C in horizontal installation.
The test voltage for the 24 V DC circuit is 500 VDC.