S7-200CN is a programmable controller designed by Siemens for small-scale control applications. This series of products has the advantages of low cost, small size and easy operation, and is suitable for various production and manufacturing and process control fields.
This manual covers the Siemens S7-200CN programmable controller series, describing the different CPU types, their I/O configurations, power requirements, and supported communication interfaces. It is intended for engineers and technicians who install, program, and maintain the controller in industrial automation applications.
Key sections include CPU specifications, LED indicator functions, wiring and terminal diagrams, power supply details, and guidance on using RS‑232, RS‑485, Modbus, GPRS, AS‑Interface and Profibus‑DP connections. The document also lists part numbers for related modules and provides reference tables for quick configuration. This manual is written in Chinese.
| CPU 221 I/O | 6 DI / 4 DO |
|---|---|
| CPU 222 I/O | 8 DI / 6 DO |
| CPU 224 I/O | 14 DI / 10 DO |
| CPU 224XP I/O | 14 DI / 10 DO + 2 AI / 1 AO |
| CPU 226 I/O | 24 DI / 16 DO |
| Power supply voltage | 24 V DC, 84‑264 V AC |
| Operating frequency | 30 kHz + 200 kHz |
The controller can be powered from a 24 V DC source or from an AC supply ranging from 84 V to 264 V.