Siemens 6ES5922-3UA11 Processor Module

Siemens 6ES5922-3UA11 Processor Module is the CPU922 central processor for Siemens SIMATIC S5 central controllers, specifically the S5-135U and S5-155U models. As a CPU922 module, it provides 22 KB of RAM for user data and includes a dedicated expansion path via a memory submodule that accepts RAM or EPROM to extend usable program memory up to 64 KB. The unit includes a single serial interface accessible through a 15-pin Cannon connector, enabling programming and serial communication with peripheral devices or other components in the S5 rack. Designed to integrate into the CPU922 architecture within the central controller rack, this module executes the control logic and coordinates I/O in legacy S5 automation systems. In typical configurations, it pairs with a memory submodule to support the required software size while remaining compatible with S5-135U/155U central controllers to support existing automation installations that rely on the CPU922 family.