Siemens 6ES7211-0AA22-0XB0 Programmable Logic Controller

Siemens SIMATIC S7-200 CPU 221 module, part number 6ES7211-0AA22-0XB0, is a compact CPU unit in the S7-200 family designed for small automation tasks. The 6ES7211-0AA22-0XB0 designation identifies a DC/DC/DC power configuration and positions the device as a spare-part CPU 221 suitable for replacement in existing S7-200 installations. Siemens datasheets indicate this unit operates with 15 V logic and lists a typical input current for a logic “1” of about 4 mA, reflecting its low-load digital input characteristics. As a member of the SIMATIC S7-200 product line, it serves as the central processing unit for small control schemes and is commonly used to replace failed CPU modules within S7-200 configurations.