{"product_id":"6es5951-7nd21-siemens-simatic-s5-power-supply-module","title":"Siemens 6ES5951-7ND21 Simatic S5 Power Supply Module","description":"\u003ch3\u003eDescription\u003c\/h3\u003e\u003cp\u003eThe Siemens 6ES5951-7ND21 is a dedicated power supply module engineered for the Simatic S5-115U\/H programmable logic controller (PLC) series. This unit serves as a critical component in legacy automation systems, converting an input voltage range of 19.2 to 30 VDC into a regulated 5 VDC output. Designed for high-availability industrial environments, it ensures stable power delivery to backplane components, effectively reducing the risk of system resets and unplanned downtime in critical control applications.\u003c\/p\u003e\u003ch3\u003eFeatures\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eDesigned specifically for the Simatic S5-115U\/H rack-based architecture.\u003c\/li\u003e\n\u003cli\u003eFlexible output capacity: Delivers 7 A at 5 VDC as a standalone unit, or up to 15 A at 5 VDC when paired with a compatible fan subassembly.\u003c\/li\u003e\n\u003cli\u003eOptimized for high-density cabinet mounting within standard S5 rail configurations.\u003c\/li\u003e\n\u003cli\u003eSupports optional external battery integration for memory retention within the S5-115 rack environment.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eApplications\u003c\/h3\u003e\u003cp\u003eThis power supply module is primarily utilized in legacy industrial control systems where high-reliability power regulation is required. Common applications include petrochemical refineries, power generation plants, and large-scale mining operations where S5-115U\/H systems remain in active service.\u003c\/p\u003e\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\u003ctable border=\"1\"\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel\u003c\/td\u003e\n\u003ctd\u003e6ES5951-7ND21\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Family\u003c\/td\u003e\n\u003ctd\u003eSimatic S5-115\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Voltage\u003c\/td\u003e\n\u003ctd\u003e19.2 to 30 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 (Standalone)\u003c\/td\u003e\n\u003ctd\u003e7 A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput Current (With Fan)\u003c\/td\u003e\n\u003ctd\u003e15 A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e1.6 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch3\u003eInstallation Guidelines\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eEnsure the PLC system is completely powered down before attempting to insert or remove the module from the rack.\u003c\/li\u003e\n\u003cli\u003eVerify that the mounting rail is properly grounded to the cabinet chassis to maintain EMI shielding.\u003c\/li\u003e\n\u003cli\u003eWhen high current demands are expected, ensure the appropriate fan subassembly is installed to reach the 15 A output capacity.\u003c\/li\u003e\n\u003cli\u003eMaintain adequate clearance around the module to allow for proper thermal dissipation, especially when operating at higher current loads.\u003c\/li\u003e\n\u003cli\u003eHandle with care to avoid damage to the backplane connector pins during insertion.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\u003ch3\u003eDoes this module include a backup battery?\u003c\/h3\u003e\u003cp\u003eNo, the 6ES5951-7ND21 does not include an internal backup battery. However, it is designed to support the use of a standard size C lithium battery (such as the CA-6EW1000-7AA) for memory retention within the S5-115 rack.\u003c\/p\u003e\u003ch3\u003eCan I use this module without a fan?\u003c\/h3\u003e\u003cp\u003eYes, the module functions as a standalone power supply providing 7 A at 5 VDC without an external fan. The fan is only required if the system configuration demands the increased 15 A output capacity.\u003c\/p\u003e","brand":"Siemens","offers":[{"title":"Default Title","offer_id":50912054640892,"sku":"6ES5951-7ND21","price":80.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0787\/9983\/1292\/files\/wm_1_6b50ee53-d025-4b38-9bff-00343a5efa2f.jpg?v=1785724230","url":"https:\/\/www.electronicplc.com\/ar\/products\/6es5951-7nd21-siemens-simatic-s5-power-supply-module","provider":"Electronic PLC","version":"1.0","type":"link"}