{"product_id":"siemens-simatic-s5-6es5-955-3nf41-power-supply-module","title":"Siemens 6ES5955-3NF41 Simatic S5 PS 955 Power Supply Module","description":"\u003ch3\u003eDescription\u003c\/h3\u003e\u003cp\u003eThe Siemens 6ES5955-3NF41, known as the PS 955 power supply module, is a high-capacity unit designed to provide regulated DC power to Simatic S5-135U and S5-155U central controllers, as well as EU 185U expansion units. This module is engineered for demanding industrial environments, including petrochemical processing, thermal power generation, and large-scale automotive manufacturing. It converts a 24 VDC input into a stable 40 A output at 5 VDC, ensuring consistent power for backplane logic, processors, and communication modules to prevent system resets and bus errors.\u003c\/p\u003e\u003ch3\u003eFeatures\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eHigh-current step-down topology for efficient power conversion and thermal management.\u003c\/li\u003e\n\u003cli\u003eProvides 40 A of regulated 5 VDC power to the backplane bus.\u003c\/li\u003e\n\u003cli\u003eIntegrated support for memory backup battery systems to maintain RAM states during power loss.\u003c\/li\u003e\n\u003cli\u003eDesigned for seamless integration with S5-135U and S5-155U rack systems.\u003c\/li\u003e\n\u003cli\u003eSupports external battery assembly connections for extended memory retention.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eApplications\u003c\/h3\u003e\u003cp\u003eThis power supply is specifically intended for use in Siemens Simatic S5-135U and S5-155U PLC systems. It is suitable for mission-critical automation tasks where stable logic voltage is required to maintain continuous operation of complex control loops and high-speed manufacturing lines.\u003c\/p\u003e\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\u003ctable border=\"1\"\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel\u003c\/td\u003e\n\u003ctd\u003e6ES5 955-3NF41 (PS 955)\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 Family\u003c\/td\u003e\n\u003ctd\u003eSimatic S5-135U \/ 155U \/ EU 185U\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Voltage\u003c\/td\u003e\n\u003ctd\u003e24 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput Voltage\u003c\/td\u003e\n\u003ctd\u003e5 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput Current\u003c\/td\u003e\n\u003ctd\u003e40 A\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\u003eBattery Compatibility\u003c\/td\u003e\n\u003ctd\u003eCA-6EW1000-7AA (Size C) \/ CA-6ES5980-0NC11\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch3\u003eInstallation Guidelines\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eEnsure the rack power is disconnected before installing or removing the module to prevent electrical shock or damage to the backplane.\u003c\/li\u003e\n\u003cli\u003eThe module requires proper alignment with the rack backplane bus to ensure even current distribution.\u003c\/li\u003e\n\u003cli\u003eVerify that the cooling paths are clear; this module relies on the system's forced-air cooling infrastructure to manage thermal loads.\u003c\/li\u003e\n\u003cli\u003eEnsure the backup battery assemblies are correctly seated in their designated holders and connected via the module's front-panel routing interfaces.\u003c\/li\u003e\n\u003cli\u003eMaintain adequate clearance around the module to allow for heat dissipation during operation.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat is the primary function of the 6ES5955-3NF41?\u003c\/strong\u003e\u003cbr\u003eThis module acts as the primary power supply for Siemens Simatic S5-135U and S5-155U controllers, converting 24 VDC input to a 40 A, 5 VDC output for system logic.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes this module handle memory backup?\u003c\/strong\u003e\u003cbr\u003eYes, it includes interfaces for external backup battery assemblies (such as the CA-6EW1000-7AA) to ensure RAM memory states are preserved during primary power failures.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs this module compatible with other S5 series?\u003c\/strong\u003e\u003cbr\u003eIt is specifically designed for the S5-135U, S5-155U, and EU 185U expansion units. Please verify your specific rack configuration before installation.\u003c\/p\u003e","brand":"Siemens","offers":[{"title":"Default Title","offer_id":50991331082492,"sku":"6ES5955-3NF41","price":80.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0787\/9983\/1292\/files\/wm_1_c7bc9ea7-9ed6-4490-941f-454a7d1124ce.jpg?v=1786990864","url":"https:\/\/www.electronicplc.com\/es\/products\/siemens-simatic-s5-6es5-955-3nf41-power-supply-module","provider":"Electronic PLC","version":"1.0","type":"link"}