Siemens 6ES7 953-8LM20-0AA0 is a SIMATIC Micro Memory Card (MMC) with 4 MB capacity designed as a removable memory module for S7-300 PLCs with DP interface. It stores PLC programs and related data, enabling portable memory exchange and persistent data retention within industrial automation systems. Compatible with SIMATIC S7-300 CPUs that include a DP interface (excluding CPU 319), this 4 MB MMC is part of Siemens' line of micro memory cards used to expand memory for S7-300 controllers.
