Siemens 6ES7211-0BA23-0XB0 is a CPU 221 compact module in the SIMATIC S7-200 family, a small PLC designed for compact automation tasks and powered by 230 VAC with 6 DC inputs and 4 relay outputs. It includes 4 KB of program memory and 2 KB of data memory, with an optional pluggable memory module that can store recipes, data logs, and other files for persistent parameters and history. The 6ES7211-0BA23-0XB0 designation identifies this CPU 221 Compact unit within the S7-200 line, conveying its discrete I/O configuration and Siemens engineering compatibility for simple, robust control applications.
