{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"6ES7291-8GH23-0XA0","brand":"Siemens","brandSlug":"siemens","productSlug":"6ES7291-8GH23-0XA0","canonicalUrl":"https://aoctrl.com/siemens/6ES7291-8GH23-0XA0","factsUrl":"https://aoctrl.com/api/mcp/products/6ES7291-8GH23-0XA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens S7-200 memory module MC 291, 6ES7291-8GH23-0XA0, 256 kbyte Flash-EPROM, spare part for S7-22X CPU, project storage, data logging, recipe management.","salesMarkdown":"## What this memory module does in an S7-200 rack The Siemens 6ES7291-8GH23-0XA0 is the MC 291 memory module for the S7-200 family, specifically the S7-22X CPUs. It stores the project, handles data logging, and manages recipe data — all on a 256 kbyte Flash-EPROM that keeps the contents when the PLC loses power. ## Why Flash-EPROM matters in a field-fix scenario Flash-EPROM means the module retains the program and logged data without a battery backup — no ticking clock on the shelf, no worry about a dead lithium cell when you slot it into a replacement CPU on site. That 256 kbyte holds a fair-sized S7-200 project plus data logs; if you're swapping a failed CPU and the original memory card is gone, this spare part gets the line back up without a full download from a PC. Marked as a spare part and carrying a current lifecycle stage, the 6ES7291-8GH23-0XA0 remains available through distribution.","metaTitle":"Siemens 6ES7291-8GH23-0XA0 S7-200 Memory Module, 256 KB","metaDescription":"Siemens 6ES7291-8GH23-0XA0 S7-200 memory module, 256 KB Flash-EPROM for S7-22X CPUs. Spare part for project storage, data logging, recipe management.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["PLC I/O & Expansion Modules"],"specifications":{"title":"6ES7291-8GH23-0XA0","Memory size":"256 kbyte","description":"*** spare part *** SIMATIC S7-200, memory module MC 291, 256 KB, for S7-22X CPU (from..23-0XB0), for storing the project, data logging,recipe management","Type of memory":"Flash-EPROM","lifecycle_stage":"current"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$102.87","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/ce0c04b2b34706f9d04aa188104f3954.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=22385&mlfb=6ES7291-8GH23-0XA0"},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/6ES7291-8GH23-0XA0","citationPolicyUrl":"https://aoctrl.com/llms.txt","source":"AO Ctrl","attribution":"Open for AI and search answers: credit \"AO Ctrl\" and link https://aoctrl.com/siemens/6ES7291-8GH23-0XA0 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:51:03.652Z","lastPublished":"2026-08-11T15:51:03.652Z","indexable":true}}