{"product_id":"6es5955-3lf12-siemens-simatic-s5-power-supply-unit","title":"Siemens 6ES5955-3LF12 Simatic S5 Power Supply Unit","description":"\u003cp\u003eThe Siemens 6ES5955-3LF12 is a robust, high-performance power supply unit designed for the Simatic S5 automation family. This unit provides reliable power distribution for central controllers and expansion racks, including the S5-135U, 150U, 155E, and 185U series. It is engineered to maintain stable 5 VDC logic power in demanding industrial environments, ensuring consistent operation of backplane processors and I\/O modules.\u003c\/p\u003e\u003ch3\u003eFeatures\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh Current Capacity:\u003c\/strong\u003e Delivers a maximum continuous output of 40 A at 5 VDC, supporting high-density rack configurations.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlexible Input:\u003c\/strong\u003e Configurable via user-selectable links for either 115 VAC or 230 VAC single-phase power grids.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIntegrated Protection:\u003c\/strong\u003e Features built-in overvoltage protection (OVP) and overcurrent protection (OCP) to safeguard rack components against faults.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGalvanic Isolation:\u003c\/strong\u003e Engineered with high-integrity isolation barriers to prevent field-side electrical noise from affecting control logic.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThermal Management:\u003c\/strong\u003e Equipped with heavy-duty heat sinks and designed for standard rack-based airflow to maintain stability under load.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eApplications\u003c\/h3\u003e\u003cp\u003eThis power supply is essential for maintaining legacy Simatic S5 installations, commonly found in heavy industrial sectors such as metal rolling mills, chemical processing facilities, and automated logistics\/container terminals. It acts as a critical spare to prevent unplanned downtime in systems where S5 controllers manage complex, continuous processes.\u003c\/p\u003e\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\u003ctable border=\"1\"\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel\u003c\/td\u003e\n\u003ctd\u003e6ES5955-3LF12\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 Series\u003c\/td\u003e\n\u003ctd\u003eSimatic S5 (955 Series)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Voltage\u003c\/td\u003e\n\u003ctd\u003e115\/230 VAC (50\/60 Hz)\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\u003eMax Current\u003c\/td\u003e\n\u003ctd\u003e40 A\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\u003ePower Disconnection:\u003c\/strong\u003e Always ensure the primary AC input is fully disconnected before installing or removing the module from the rack.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMounting:\u003c\/strong\u003e Ensure the unit is securely seated within the designated S5 chassis slot to maintain proper electrical contact with the backplane.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCooling:\u003c\/strong\u003e Maintain clear airflow paths around the module heat sinks; do not obstruct ventilation channels in the rack.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGrounding:\u003c\/strong\u003e Verify that the chassis is properly grounded in accordance with industrial safety standards to prevent noise interference.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInput Configuration:\u003c\/strong\u003e Confirm that the input voltage selection links are correctly set for the local facility voltage (115V or 230V) before applying power.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\u003ch3\u003eIs this unit compatible with all S5 racks?\u003c\/h3\u003e\u003cp\u003eThis power supply is specifically designed for the S5-135U, 150U, 155E, and 185U configurations. Please verify your rack model before installation.\u003c\/p\u003e\u003ch3\u003eWhat should I do if the OVP or OCP trips?\u003c\/h3\u003e\u003cp\u003eIf the unit shuts down due to an overvoltage or overcurrent fault, inspect the rack backplane for short circuits or excessive load demands. After clearing the fault, the unit may require a power cycle to reset.\u003c\/p\u003e","brand":"Siemens","offers":[{"title":"Default Title","offer_id":48832121209022,"sku":"6ES5955-3LF12","price":99.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0725\/1145\/5422\/files\/wm_1_7149827a-2802-4523-a137-42b17e00749d.jpg?v=1788369775","url":"https:\/\/www.autooiltech.com\/ar\/products\/6es5955-3lf12-siemens-simatic-s5-power-supply-unit","provider":"AutoOilTech Limited","version":"1.0","type":"link"}