{"product_id":"siemens-simatic-s5-6es5-184-3ua21-expansion-rack-chassis","title":"Siemens 6ES5 184-3UA21 Simatic S5 Expansion Rack Chassis","description":"\u003ch3\u003eSystem Overview\u003c\/h3\u003e\u003cp\u003eThe Siemens Simatic S5 6ES5 184-3UA21 is a robust 21-slot expansion rack designed to extend the I\/O capacity of S5-135U and S5-155U PLC systems. This industrial subrack provides a stable, high-density mounting environment for digital and analog I\/O modules, communication processors, and specialized function boards. Built for demanding environments such as power generation and heavy manufacturing, this chassis ensures reliable backplane communication and structural integrity for critical control architectures.\u003c\/p\u003e\u003ch3\u003eFeatures\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-Density Capacity:\u003c\/strong\u003e Provides 21 dedicated slots for S5-135U\/155U series modules.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIntegrated Thermal Management:\u003c\/strong\u003e Features a built-in DC cooling fan assembly to ensure forced-air circulation and prevent thermal degradation of sensitive electronic components.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRobust Construction:\u003c\/strong\u003e Heavy-duty aluminum chassis designed to withstand mechanical stress and maintain alignment in industrial cabinets.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEMI Protection:\u003c\/strong\u003e Integrated grounding points facilitate a common reference potential, reducing electromagnetic interference across the backplane.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrecision Alignment:\u003c\/strong\u003e Engineered card guide rails ensure accurate module seating and protect backplane pins during installation.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\u003ctable border=\"1\"\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel\u003c\/td\u003e\n\u003ctd\u003e6ES5 184-3UA21\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSeries\u003c\/td\u003e\n\u003ctd\u003eSimatic S5-135U \/ S5-155U\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\u003eCooling\u003c\/td\u003e\n\u003ctd\u003eIntegrated DC Fan\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFan Input Voltage\u003c\/td\u003e\n\u003ctd\u003e24 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temperature\u003c\/td\u003e\n\u003ctd\u003e0 to 55 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\u003c\/table\u003e\u003ch3\u003eInstallation Guidelines\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMounting:\u003c\/strong\u003e Ensure the rack is securely fastened to a standard 19-inch industrial enclosure or mounting frame.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCooling Clearance:\u003c\/strong\u003e Maintain adequate space above and below the rack to allow the integrated fan to pull ambient air through the card guides effectively.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGrounding:\u003c\/strong\u003e Connect the chassis grounding point to the cabinet's protective earth (PE) busbar using a low-impedance conductor to minimize EMI.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eModule Handling:\u003c\/strong\u003e Always power down the rack before inserting or removing modules to prevent electrical arcing or damage to the backplane bus.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEnvironment:\u003c\/strong\u003e Install in a clean, dry environment free from excessive dust, corrosive gases, or extreme vibration.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\u003ch3\u003eIs this rack compatible with all S5 modules?\u003c\/h3\u003e\u003cp\u003eThis rack is specifically designed for the S5-135U and S5-155U PLC series. Please verify that your specific module types are compatible with the S5-135\/155 backplane bus architecture before installation.\u003c\/p\u003e\u003ch3\u003eHow is the cooling fan powered?\u003c\/h3\u003e\u003cp\u003eThe integrated cooling fan requires a 24 VDC power supply input. Ensure the power source is correctly wired to the designated terminals to maintain airflow.\u003c\/p\u003e","brand":"Siemens","offers":[{"title":"Default Title","offer_id":51090631295228,"sku":"6ES5704-3BC50","price":99.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0787\/9983\/1292\/files\/wm_1_3e4f0016-838f-446d-858f-5ed5c8b01fae.jpg?v=1788025803","url":"https:\/\/www.electronicplc.com\/es\/products\/siemens-simatic-s5-6es5-184-3ua21-expansion-rack-chassis","provider":"Electronic PLC","version":"1.0","type":"link"}