Siemens 6ES7212-1BB21-0XB0 Programmable Logic Controller Module

The Siemens 6ES7212-1BB21-0XB0 is a SIMATIC S7-200 CPU 222 compact unit designed for compact automation tasks. It provides 8 DC digital inputs and 6 relay-driven digital outputs, enabling direct sensing and actuation in small control panels or machines. The module includes 4 KB of code memory and 2 KB of data memory, offering enough space for straightforward control logic and data handling. It supports PROFIBUS DP as an extension, allowing basic fieldbus communication with DP masters and connected devices. Powered by an AC supply, this CPU integrates with the S7-200 family hardware ecosystem and carries the 6ES7212-1BB21-0XB0 article number. Siemens lists this exact model as no longer available, reflecting its status as part of the older S7-200 line.