Siemens 6ES5 095-8MC03 Programmable Logic Controller

Siemens SIMATIC S5 6ES5-095-8MC03 is a CPU module for the SIMATIC S5 automation family, designed for use in the S5-95U series (S5-90U/S5-95U). The 6ES5-095-8MC03 variant carries the MC03 suffix, which denotes the inclusion of a second serial interface (COM2) and a dedicated programming port for serial communication and programming tasks. This CPU functions as the central controller in legacy Siemens S5 installations, coordinating logic execution and communication with compatible I/O modules and field devices within a classic 5-slot rack system. Distributor and repair listings identify the device under the 6ES5-095-8MC03 SKU and confirm its status as part of the S5-95U family, with older revisions sometimes referenced alongside E-Stand 02. Availability ranges from new-old-stock to used units in repair inventories, reflecting its role in long‑running plants that still operate legacy S5 control architectures. Typical references in catalogs and manuals tie the MC03 variant to serial communications capabilities and on-board programming interfaces, making it suitable for diagnostics, field programming, and replacement in aging automation plants.