{"product_id":"siemens-simatic-s5-6es5921-3wa13-cpu-module","title":"Siemens SIMATIC S5 6ES5921-3WA13 Module CPU","description":"\u003ch3\u003eProduct Overview\u003c\/h3\u003e\n\u003cp\u003e\u003cspan class=\"citation-340\"\u003eThe\u003cspan\u003e \u003c\/span\u003e\u003c\/span\u003e\u003cstrong\u003eSiemens 6ES5921-3WA13 (6ES59213WA13)\u003c\/strong\u003e\u003cspan class=\"citation-340 citation-end-340\"\u003e\u003cspan\u003e \u003c\/span\u003eis a high-performance CPU 921 module designed for the Siemens SIMATIC S5-130W and S5-135U programmable controller series.\u003csup class=\"superscript\"\u003e\u003c\/sup\u003e\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003eFunctioning as a Central Controller, this module is the operational \"brain\" of the PLC system, responsible for executing complex binary logic, word processing, and timing functions. It is a critical component for maintaining legacy automation systems in sectors such as automotive manufacturing, industrial drying, and material handling.\u003cspan\u003e \u003c\/span\u003e\u003cspan class=\"citation-339\"\u003eThe\u003cspan\u003e \u003c\/span\u003e\u003c\/span\u003e\u003cstrong\u003e6ES5921-3WA13\u003c\/strong\u003e\u003cspan class=\"citation-339 citation-end-339\"\u003e\u003cspan\u003e \u003c\/span\u003eis engineered for durability and deterministic performance, ensuring that high-speed industrial processes remain synchronized and stable even in environments with significant electrical noise.\u003csup class=\"superscript\"\u003e\u003c\/sup\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003eTechnical Configuration\u003c\/h3\u003e\n\u003cp\u003e\u003cspan class=\"citation-338\"\u003eThe\u003cspan\u003e \u003c\/span\u003e\u003c\/span\u003e\u003cstrong\u003e6ES5921-3WA13\u003c\/strong\u003e\u003cspan class=\"citation-338 citation-end-338\"\u003e\u003cspan\u003e \u003c\/span\u003eCPU 921 is optimized for the S5-130W\/135U backplane architecture, providing robust control for distributed and local I\/O.\u003csup class=\"superscript\"\u003e\u003c\/sup\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eProcessor Performance\u003c\/strong\u003e: Designed to process STEP 5 programmed logic with high efficiency, handling both bit-oriented and word-oriented operations.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eSystem Integration\u003c\/strong\u003e: Functions within the central rack, communicating with digital, analog, and functional modules via the parallel S5 bus.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eDiagnostic Capabilities\u003c\/strong\u003e: Features front-panel LED indicators that provide real-time status on CPU health, program execution (RUN), and system errors (STOP\/FAULT).\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eMemory Slot\u003c\/strong\u003e: Includes an integrated interface for external memory submodules, allowing for easy program updates and non-volatile storage of critical process data.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eProgramming Interface\u003c\/strong\u003e: Standardized front port allows for direct connection to Siemens PG (Programming Units) or modern engineering workstations via appropriate TTY\/RS232 adapters.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr class=\"firstRow\"\u003e\n\u003ctd\u003e\u003cstrong\u003eAttribute\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eSpecification\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eModel\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e6ES5921-3WA13\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eBrand\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eSiemens\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eSeries\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eSIMATIC S5\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eController Type\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eCPU 921 (S5-130W Central Controller)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eProgramming Language\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eSTEP 5\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eCommodity Code\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e85389091\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eWeight\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e0.56 kg\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eDimensions\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e10.50 x 13.00 x 7.50 cm\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eECCN\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eN (Not restricted)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eOperating Temp\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e0-55 deg C\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eStatus\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eObsolete (Legacy Replacement Part)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eTechnical FAQs\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eCan the 6ES5921-3WA13 be used in an S5-115U rack?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eNo. This module is specifically designed for the S5-130W and S5-135U rack systems. The physical dimensions and backplane connector pinouts are incompatible with the S5-115U series.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat should I check if the STOP LED is illuminated?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA red STOP LED indicates the CPU has halted. You should use a programming unit to check the \"I-Stack\" and \"B-Stack.\" Common causes include a \"QVZ\" (Time-out) error due to a faulty I\/O module or a programming error in the STEP 5 logic.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIs a battery required for this CPU module?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe CPU requires a backup battery (typically located in the power supply module of the S5 rack) to retain the RAM-based user program and internal flags during power-off. If the \"BATT LOW\" light on the power supply is on, replace it immediately to avoid program loss.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003eEngineering \u0026amp; Installation Guide\u003c\/h3\u003e\n\u003cul class=\"list-paddingleft-2\"\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eMemory Submodule Handling:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eWhen installing or replacing the memory submodule (EPROM\/RAM) on the front of the 6ES5921-3WA13, ensure the PLC power is completely disconnected. Electrostatic Discharge (ESD) precautions should be taken, as the internal CMOS memory is highly sensitive to static.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eBackplane Seating:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eThis module uses high-density S5 backplane connectors. When inserting the module into the rack, ensure it is aligned perfectly with the guide rails. Press firmly until the module is fully seated, then tighten the top and bottom retaining screws to ensure proper grounding and signal continuity.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eLegacy Maintenance:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eSince this module is in the \"Obsolete\" phase, regular inspections of the electrolytic capacitors and contact points are recommended. If the module is being installed from long-term storage, verify the pins for oxidation and clean them with a non-residue contact cleaner if necessary.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Siemens","offers":[{"title":"Default Title","offer_id":52716787335531,"sku":"6ES5921-3WA13","price":100.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0953\/3227\/0443\/files\/6es5921-3wa13-gs1myoomjqz_d2604811-7aec-46c2-a2d6-9c859a787e64.jpg?v=1767089794","url":"https:\/\/www.plcprotech.com\/fr\/products\/siemens-simatic-s5-6es5921-3wa13-cpu-module","provider":"PLC ProTech Ltd.","version":"1.0","type":"link"}