Siemens 6ES7954-8LL02-0AA0 is a 256 MB micro memory card for SIMATIC S7-1X00 CPUs, built with 3.3 V flash memory. The card measures 24 mm in width, 32 mm in height, and 2.1 mm in depth, and weighs about 3 g. It is used to store PLC programs and data for S7-1X00 controllers, offering a minimum data retention of 10 years after final programming and at least 500,000 write/delete cycles. As a spare part for the S7-1X00 CPU family, it provides the official Siemens memory card solution for onboard program and data storage.
