{"product_id":"siemens-simatic-s5-6es5135-3ka31-21-slot-plc-rack","title":"Siemens 6ES5135-3KA31 Simatic S5 21-Slot PLC Rack","description":"\u003cp\u003eThe Siemens 6ES5135-3KA31 is a 21-slot central controller subrack engineered for the Simatic S5-135U automation system. This chassis serves as the primary structural and electrical backbone for high-density S5-135U configurations, facilitating high-speed communication and power distribution between multiple CPUs, I\/O modules, and memory cards. Designed for deployment in demanding environments such as heavy manufacturing, steel mills, and power generation facilities, this rack provides the mechanical stability and electrical integrity required for complex, multi-processor control architectures.\u003c\/p\u003e\u003ch3\u003eFeatures\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-Capacity Architecture:\u003c\/strong\u003e Provides 21 physical slots for extensive system expansion and modular I\/O integration.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRobust Backplane:\u003c\/strong\u003e Features a multi-layer bus design with high-conductivity gold-plated connectors to reduce contact resistance and prevent long-term signal degradation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIndustrial Reliability:\u003c\/strong\u003e Built to withstand the mechanical stresses and vibration profiles typical of large-scale industrial control cabinets.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSignal Integrity:\u003c\/strong\u003e Integrated shielding and trace routing minimize electromagnetic interference, ensuring stable communication between processors and peripheral modules.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePower Distribution:\u003c\/strong\u003e Optimized for a 5 VDC logic supply (18 A capacity) and auxiliary 24 VDC rails to support diverse module requirements.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eApplications\u003c\/h3\u003e\u003cp\u003eThis subrack is specifically intended for use within the Siemens Simatic S5-135U product ecosystem. It is an essential component for maintaining legacy automation systems where high-density I\/O and multi-CPU processing are required. It is frequently utilized in retrofitting or repairing existing S5-135U control panels to extend the operational lifespan of legacy production lines.\u003c\/p\u003e\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel\u003c\/td\u003e\n\u003ctd\u003e6ES5135-3KA31\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSystem\u003c\/td\u003e\n\u003ctd\u003eSimatic S5-135U\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSlot Count\u003c\/td\u003e\n\u003ctd\u003e21 Slots\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLogic Bus Supply\u003c\/td\u003e\n\u003ctd\u003e5 VDC (18 A max)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAuxiliary Supply\u003c\/td\u003e\n\u003ctd\u003e24 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temp\u003c\/td\u003e\n\u003ctd\u003e0 to 55 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStorage Temp\u003c\/td\u003e\n\u003ctd\u003e-40 to 70 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch3\u003eInstallation Guidelines\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMounting:\u003c\/strong\u003e Designed for standard 19-inch industrial rack mounting. Ensure the mounting surface is rigid and capable of supporting the chassis weight.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePower Handling:\u003c\/strong\u003e Ensure the power supply unit is correctly seated before energizing the backplane. Always disconnect primary power before inserting or removing any modules from the rack.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGrounding:\u003c\/strong\u003e Maintain a low-impedance connection to the cabinet chassis ground to ensure effective noise suppression and electrical safety.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEnvironment:\u003c\/strong\u003e Maintain adequate airflow around the chassis to prevent thermal accumulation. Avoid installing near high-power frequency drives or other significant EMI sources.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHandling:\u003c\/strong\u003e Use ESD-safe practices when handling the backplane or inserting modules to prevent damage to sensitive electronic components.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eIs the power supply included with this rack?\u003c\/strong\u003e No, the 6ES5135-3KA31 is the subrack chassis only. It requires a compatible slide-in power supply unit to be installed separately.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan this be used for other S5 series systems?\u003c\/strong\u003e This rack is specifically designed for the S5-135U central controller system. Please verify your system compatibility before installation.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs this part still in production?\u003c\/strong\u003e No, this component was discontinued by the manufacturer in 1993. We provide these as reliable, field-tested components for legacy system maintenance.\u003c\/p\u003e","brand":"Siemens","offers":[{"title":"Default Title","offer_id":44003174285402,"sku":"6ES5135-3KA31","price":99.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0710\/5957\/0778\/files\/wm_1_9ca71209-23b6-4a84-b6dd-8a9364811e40.jpg?v=1788365825","url":"https:\/\/www.spareoil.com\/ar\/products\/siemens-simatic-s5-6es5135-3ka31-21-slot-plc-rack","provider":"SpareOil Automation","version":"1.0","type":"link"}