SIEMENS 6ES5947-3UA22

Siemens SIMATIC S5 CPU 947 Central Processing Unit 256KB 6ES5947-3UA22 Description The 6ES5947-3UA22 is a high-performance Central Processing Unit (CPU) from the Siemens SIMATIC S5 series. Designed for the S5-135U, S5-155U, and S5-155H systems, this CPU 947 provides robust processing power and a substantial 256 KB memory for demanding automation tasks. It is an essential component for maintaining legacy systems and ensuring operational continuity without the need for a full-scale migration. Specifications Manufacturer: Siemens Product Line: SIMATIC S5 Model: CPU 947 Part Number: 6ES5947-3UA22 Memory: 256 Kbytes Programming Interface: 15-pin D-Sub (for PG connection) Compatible Systems: S5-135U, S5-155U, S5-155H Label Info Siemens SIMATIC S5 MLFB: 6ES5947-3UA22 Application This CPU is ideal for complex control applications in manufacturing, process control, and material handling systems that rely on the proven Siemens S5 platform. It is a direct replacement part for existing S5-135U/155U installations, extending the life of critical machinery. Country of Origin Made in Germany. CO2 Impact By reusing this industrial part, you are contributing to a more sustainable circular economy, avoiding approximately 24 kg of CO2 emissions associated with the production of a new component. This is equivalent to saving the emissions of a 120-kilometer car journey. Availability This is an obsolete item, but it is available from our stock. Order now from profideals for expert support and fast delivery. FAQ Question? Can I use this CPU 947 in any SIMATIC S5 rack? Answer: No, the 6ES5947-3UA22 is a high-performance CPU designed specifically for the S5-135U, S5-155U, and S5-155H programmable controllers. It is not compatible with smaller racks like the S5-95U, S5-100U, or S5-115U. Question? What programming software and cable are required for this CPU? Answer: This CPU is programmed using Siemens’ legacy STEP 5 software. You will need a specific programming cable that connects your programming device (PG) to the 15-pin D-Sub port on the front of the module. Question? Does this module require an external memory submodule to retain its program? Answer: The CPU 947 has onboard RAM for the user program. To ensure program retention during a power outage, it relies on a backup battery installed in the power supply module of the S5 rack. It does not use plug-in EPROM or EEPROM submodules like some other S5 CPUs. profideals is not an authorized distributor, reseller or representative of the products featured on this website. All product names, trademarks, brands and logos used on this site are the property of their respective owners. Last Update: Friday, March 13, 2026