{"product_id":"siemens-6es5-928-3ua21-simatic-s5-cpu-928a-module","title":"Siemens 6ES5928-3UA21 SIMATIC S5 CPU 928A Central Processing Unit","description":"\u003ch3\u003eDescription\u003c\/h3\u003e\u003cp\u003eThe Siemens 6ES5928-3UA21 (CPU 928A) is a high-performance central processing unit module engineered for use within the SIMATIC S5-135U and S5-155U programmable logic controller systems. This module is specifically designed to support multi-processor configurations, enabling complex control algorithms and high-speed arithmetic processing in demanding industrial environments. By offloading specific bit and word execution tasks, the CPU 928A ensures deterministic cycle times and maintains system stability in critical applications such as power generation, chemical processing, and heavy manufacturing.\u003c\/p\u003e\u003ch3\u003eFeatures\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eDual-processor architecture for independent handling of binary and word-based mathematical operations.\u003c\/li\u003e\n\u003cli\u003eOptimized for multi-processor backplane communication, allowing up to four CPUs to operate in parallel without memory contention.\u003c\/li\u003e\n\u003cli\u003eIntegrated slot for interchangeable EPROM or RAM memory submodules.\u003c\/li\u003e\n\u003cli\u003eFront-panel status LED array for real-time diagnostics, including battery health, synchronization status, and operational mode.\u003c\/li\u003e\n\u003cli\u003eStandardized programming interface for rapid configuration and troubleshooting.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eApplications\u003c\/h3\u003e\u003cp\u003eThe CPU 928A is primarily utilized in large-scale automation systems requiring high availability and complex logic processing. It is a standard component for S5-135U and S5-155U racks where multiple processors are required to manage dense I\/O counts and high-speed control loops.\u003c\/p\u003e\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel\u003c\/td\u003e\n\u003ctd\u003e6ES5928-3UA21 (CPU 928A)\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\u003eSeries\u003c\/td\u003e\n\u003ctd\u003eSIMATIC S5 (135U\/155U)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eModule Type\u003c\/td\u003e\n\u003ctd\u003eCentral Processing Unit\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Voltage\u003c\/td\u003e\n\u003ctd\u003e5 VDC (via backplane)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCurrent Consumption\u003c\/td\u003e\n\u003ctd\u003e3.5 A (typical)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temperature\u003c\/td\u003e\n\u003ctd\u003e0 to 60 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStorage Temperature\u003c\/td\u003e\n\u003ctd\u003e-40 to 70 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRelative Humidity\u003c\/td\u003e\n\u003ctd\u003e95 percent non-condensing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSuccessor Component\u003c\/td\u003e\n\u003ctd\u003e6ES5928-3UB21\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch3\u003eInstallation Guidelines\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eEnsure the PLC rack is powered down before inserting or removing the CPU module to prevent electrical damage or backplane bus errors.\u003c\/li\u003e\n\u003cli\u003eVerify that the module is correctly seated in the designated CPU slot; ensure the backplane connector pins are aligned and fully engaged.\u003c\/li\u003e\n\u003cli\u003eHandle the module using proper ESD (Electrostatic Discharge) precautions to protect sensitive internal circuitry.\u003c\/li\u003e\n\u003cli\u003eMaintain adequate ventilation within the control cabinet to keep ambient temperatures within the 0 to 60 deg C operating range.\u003c\/li\u003e\n\u003cli\u003eRoute communication cables away from high-voltage power lines to minimize EMI (Electromagnetic Interference) risks.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\u003ch3\u003eIs the 6ES5928-3UA21 compatible with all S5 racks?\u003c\/h3\u003e\u003cp\u003eThis module is designed specifically for the SIMATIC S5-135U and S5-155U series. It is intended for multi-processor environments and should be used in accordance with the specific rack configuration requirements for these systems.\u003c\/p\u003e\u003ch3\u003eWhat is the recommended replacement for this module?\u003c\/h3\u003e\u003cp\u003eThe official successor component for this CPU is the 6ES5928-3UB21. Please verify your system's specific requirements before performing a hardware upgrade.\u003c\/p\u003e","brand":"Siemens","offers":[{"title":"Default Title","offer_id":51097274581244,"sku":"6ES5928-3UA21","price":80.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0787\/9983\/1292\/files\/wm_1_edb4d990-bf23-444b-b255-30860662b0c1.jpg?v=1788030956","url":"https:\/\/www.electronicplc.com\/es\/products\/siemens-6es5-928-3ua21-simatic-s5-cpu-928a-module","provider":"Electronic PLC","version":"1.0","type":"link"}