Siemens ST 70· 2003 2 SIMATIC S7-400 is a powerful PLC suitable for medium to high-performance control applications. It features modular design, fanless operation, and user-friendly interface. It is used in various industries such as general mechanical engineering, automotive industry, and automated warehousing.
The SIMATIC S7-400 is a modular, fan‑less programmable logic controller designed for medium to high‑performance automation tasks. It can be configured with power, CPU, signal, communication and function modules to suit a wide range of applications such as general mechanical engineering, automotive, warehousing, machine tools and process control.
The controller supports extensive communication options (MPI, PROFIBUS‑DP, industrial Ethernet), built‑in diagnostics, and optional redundant designs (S7‑400H, S7‑400F/FH) for high‑availability and safety‑critical installations. It complies with numerous international standards and offers flexible expansion up to 21 modules. This manual is written in Chinese.
| Maximum expansion units | 21 |
|---|---|
| Operating temperature range | 0 °C – 60 °C |
| MPI node limit | 32 nodes |
| Maximum data rate | 12 Mbit/s |
| Maximum bus nodes (PROFIBUS‑DP) | 125 |
Up to 21 expansion units can be connected to a single S7‑400 controller.
The controller supports MPI, PROFIBUS‑DP, industrial Ethernet, and various point‑to‑point communication modules.