Siemens 6ES7954-8LC02-0AA0 SIMATIC S7 Memory Card
https://www.sawab.app/shop/6es7954-8lc02-0aa0-siemens-6es7954-8lc02-0aa0-simatic-s7-memory-card-1778
https://www.sawab.app/web/image/product.template/1778/image_1920?unique=573e679
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SIMATIC S7, memory card for S7-1x 00 CPU/SINAMICS, 3, 3 V flash, 4 MB