Siemens S7-400 Power PLC is a powerful PLC that is suitable for medium and high performance control applications. It has functionally graded CPUs and a wide variety of templates that can find the best solution for its automation tasks. In addition, it can also achieve distributed systems and expand communication capabilities, and the system is flexibly composed.
The guide covers the SIMATIC S7-400 PLC family, describing the available CPU modules (CP 440, CP 441‑1, CP 441‑2, CP 443‑5, CP 443‑1, CP 444) and their functions. It explains the wiring and power requirements, including the 120/230 V AC supply and the MPI communication interface.
Additional sections detail the PROFIBUS‑DP network setup, expansion unit limits, and installation procedures. Technical specifications such as communication speed (12 Mbit/s) and maximum bus lengths are provided to help users design reliable automation systems.