Siemens 6ES5946-3UA22 is a SIMATIC S5 central processing unit (CPU 946) designed for the S5-155U PLC family. As a 946-series CPU module, it provides the processing core for executing user programs and coordinating data within the S5 control system. Siemens’ Industry Mall lists this product as no longer available, indicating it is discontinued and typically encountered today as used or surplus stock from secondary markets. The 6ES5946-3UA22 variant is cataloged among CPU 946 devices, compatible with S5 configurations that require the 946 CPU in the older Siemens S5 automation ecosystem.
