Siemens 6ES79538LM200AA0 Simatic S7-300 Memory Card

Siemens 6ES79538LM200AA0 SIMATIC S7-300 Memory Card is a micro memory card (MMC) designed for SIMATIC S7-300/C7/ET 200 PLCs to store the CPU’s load memory and program data. It uses non-volatile 3 V NAND flash storage, enabling data retention between power cycles, and is intended to be used in the S7-300 micro memory card slot on compatible CPUs. This card provides portable storage for PLC programs and configurations, supporting tasks such as program transfer between controllers, offline edits, and backup of runtime data. As part of Siemens’ micro memory card family, it is specified for use with S7-300 systems and serves as a standard memory medium for backing up load memory and program data in industrial automation environments.