Siemens 6ES7951-1KH00-0AA0 Interface Module For S7 PLC

Siemens 6ES7951-1KH00-0AA0 is a 256 KB memory card for SIMATIC S7-300 PLCs that uses 5V Flash EPROM technology to store the controller’s program blocks and configuration data. The card’s short design and compact form factor slots into the S7-300 memory-card interface, providing nonvolatile storage to back up projects or transfer them between S7-300 installations. With 256 KB of capacity, it accommodates a typical set of user program blocks, data blocks, and configuration parameters for smaller automation tasks, making it a common spare part for maintenance and repair. As an official Siemens accessory, it ensures compatibility with S7-300 CPUs that support memory-card storage, and it is documented across Siemens catalogs and partner listings under the part number 6ES7951-1KH00-0AA0. For best results, confirm the exact S7-300 CPU model and the memory card slot type in the installation to ensure proper fit and reliable data retention.