{"product_id":"6av3971-1ca02-0ca0-siemens-simatic-memory-submodule","title":"Siemens 6AV3971-1CA02-0CA0 Simatic TD20 Memory Submodule","description":"\u003ch3\u003eDescription\u003c\/h3\u003e\u003cp\u003eThe Siemens 6AV3971-1CA02-0CA0 is a specialized 128 Kbyte memory submodule engineered for the legacy Simatic TD20 operator interface terminal. This module features pre-installed firmware configured for the AS511 communication protocol, enabling reliable data exchange between the TD20 text display and the host programmable logic controller. As a critical component for legacy systems, it ensures the persistence of screen text configurations, system parameters, and variable mappings. Since the official discontinuation of this product in 2005, this module remains an essential spare for maintaining the operational continuity of legacy HMI installations in industrial environments.\u003c\/p\u003e\u003ch3\u003eFeatures\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eNon-volatile EEPROM storage architecture for reliable data retention without battery backup.\u003c\/li\u003e\n\u003cli\u003eFactory-flashed firmware optimized for AS511 point-to-point communication.\u003c\/li\u003e\n\u003cli\u003eCompact plug-in design utilizing a standard 48-pin header interface.\u003c\/li\u003e\n\u003cli\u003eDirect power supply via the host terminal connection (5 VDC).\u003c\/li\u003e\n\u003cli\u003eDesigned specifically for compatibility with the Simatic TD20 series terminals.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eApplications\u003c\/h3\u003e\u003cp\u003eThis submodule is primarily utilized in legacy automation systems where TD20 terminals are deployed for local process monitoring. Typical applications include mining machinery control, power station HMI interfaces, and legacy manufacturing production lines requiring consistent operator prompt and alarm display functionality.\u003c\/p\u003e\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\u003ctable border=\"1\"\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel\u003c\/td\u003e\n\u003ctd\u003e6AV3971-1CA02-0CA0\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eSiemens\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Series\u003c\/td\u003e\n\u003ctd\u003eSimatic TD20\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMemory Capacity\u003c\/td\u003e\n\u003ctd\u003e128 Kbytes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInterface\u003c\/td\u003e\n\u003ctd\u003e48-Pin Header\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temperature\u003c\/td\u003e\n\u003ctd\u003e0 to 50 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStorage Temperature\u003c\/td\u003e\n\u003ctd\u003e-20 to 70 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Supply\u003c\/td\u003e\n\u003ctd\u003e5 VDC (via host)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch3\u003eInstallation Guidelines\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eEnsure the TD20 terminal is completely powered down before attempting to insert or remove the memory submodule.\u003c\/li\u003e\n\u003cli\u003eHandle the module by its edges to prevent electrostatic discharge (ESD) damage to the internal EEPROM components.\u003c\/li\u003e\n\u003cli\u003eAlign the 48-pin header carefully with the expansion slot on the TD20 terminal to avoid bending pins.\u003c\/li\u003e\n\u003cli\u003eVerify that the module is fully seated in the slot to ensure reliable electrical contact.\u003c\/li\u003e\n\u003cli\u003eStore in a dry, temperature-controlled environment when not in use to maintain long-term component integrity.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eQ: Is this memory module compatible with newer Siemens HMI panels?\u003c\/strong\u003e\u003cbr\u003eA: No, this module is specifically designed for the legacy Simatic TD20 terminal and utilizes the AS511 protocol, which is not supported by modern Siemens HMI hardware.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eQ: Does this module require a battery for data retention?\u003c\/strong\u003e\u003cbr\u003eA: No, the module uses non-volatile EEPROM memory, which retains data even during extended power outages without the need for a battery.\u003c\/p\u003e","brand":"Siemens","offers":[{"title":"Default Title","offer_id":51000301912316,"sku":"6AV3971-1CA02-0CA0","price":99.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0787\/9983\/1292\/files\/wm_1_1e4a6b39-3d60-4819-abac-64621a34291c.jpg?v=1787244429","url":"https:\/\/www.electronicplc.com\/es\/products\/6av3971-1ca02-0ca0-siemens-simatic-memory-submodule","provider":"Electronic PLC","version":"1.0","type":"link"}