What this spare-part CPU replaces in a panel
The Siemens 6ES7212-1AB23-0XB8 is a SIMATIC S7-200 CN CPU 222 compact device — a spare part for existing S7-200 installations, not a current-production unit for new designs. It carries 8 digital inputs and 6 transistor outputs, all DC, with 4 KB program memory and 2 KB data memory, and is expandable via PROFIBUS DP.
I/O count and power budget for the BOM line
With 8 digital inputs and 6 transistor (sourcing) outputs, this CPU covers small machine control or standalone station logic without needing an expansion module for basic I/O. The 5 W typical power loss means a 24 VDC supply rail sized for the load plus 5 W headroom keeps the thermal rise inside the enclosure manageable.
Panel fit and lifecycle status
Lifecycle stage is listed as current, meaning it remains in the Siemens spare-parts channel for existing field installations.