The S7-200 CN series PLC is a compact, high‑performance controller for a wide range of automation tasks. It offers up to 24 digital I/O points, optional analog modules, high‑speed counters, PID control, and multiple communication options such as PPI, MPI, PROFIBUS‑DP and a free‑port interface. The series is designed for reliability, easy programming, and flexible expansion in industrial and civil applications.
The manual includes detailed technical specifications, module catalogues, wiring diagrams, installation guidelines, and programming software information (STEP 7‑Micro/WIN). It also covers power requirements, safety features, and recommended protection circuits for inductive loads. This manual is written in Chinese.
| Digital I/O points (CPU221) | 6 inputs, 4 outputs |
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CPU221 provides 6 digital inputs and 4 digital outputs, for a total of 10 I/O points.
Without repeaters, the PPI cable length is limited to 50 m.