Siemens AG S7-200 Programmable Logic Controller

The Siemens AG SIMATIC S7-200 Programmable Logic Controller is a compact micro PLC family from Siemens’ SIMATIC line, designed for small automation tasks and simple machine control. The range spans CPUs such as 221, 222, 224, and 226, including SMART variants, all programmed with STEP 7 Micro/WIN 32 and built for easy integration in compact control panels with on‑board digital I/O and expandable I/O options. In the S7-200 SMART family, the SR20 CPU provides 12 digital inputs (24 V DC), 8 relay outputs (2 A), and 20 KB of program/data memory, powered by 85–264 V AC, with onboard I/O and available communication options via RS-485 PPI and other interfaces depending on the model. This micro PLC is typically used for small conveyor control, packaging, process monitoring, and general automation tasks where a compact, cost‑effective controller is appropriate.