{"product_id":"6es5955-3lf11-siemens-simatic-s5-power-supply-module","title":"Siemens 6ES5955-3LF11 SIMATIC S5 Power Supply Module","description":"\u003ch3\u003eDescription\u003c\/h3\u003e\u003cp\u003eThe Siemens 6ES5955-3LF11 is a high-capacity power supply module engineered for the SIMATIC S5-135U, S5-150U, and S5-155U programmable controller systems, as well as the EU 185U expansion units. Designed for demanding industrial environments, this unit provides a stable 5 VDC output at 40 A, ensuring reliable operation for high-density I\/O configurations and critical automation logic. Its robust design is built to withstand the rigors of heavy manufacturing, power generation, and chemical processing facilities, providing a consistent power foundation that helps prevent unplanned downtime.\u003c\/p\u003e\u003ch3\u003eFeatures\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eDesigned for seamless integration with S5-135U, 150U, and 155U central controllers.\u003c\/li\u003e\n\u003cli\u003eSwitchable input voltage capability (115 VAC \/ 230 VAC) for global industrial compatibility.\u003c\/li\u003e\n\u003cli\u003eHigh-current output of 40 A at 5 VDC to support fully populated controller racks.\u003c\/li\u003e\n\u003cli\u003eIntegrated interface for external battery backup (CA-6EW1000-7AA) to preserve non-volatile memory and internal clock data during power outages.\u003c\/li\u003e\n\u003cli\u003eRack-mount form factor for secure installation in standard S5 cabinets.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel\u003c\/td\u003e\n\u003ctd\u003e6ES5955-3LF11\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eManufacturer\u003c\/td\u003e\n\u003ctd\u003eSiemens\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Voltage\u003c\/td\u003e\n\u003ctd\u003e115 VAC \/ 230 VAC (switchable)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput Capacity\u003c\/td\u003e\n\u003ctd\u003e5 VDC \/ 40 A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCompatibility\u003c\/td\u003e\n\u003ctd\u003eSIMATIC S5-135U, S5-150U, S5-155U, EU 185U\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\u003c\/table\u003e\u003ch3\u003eInstallation Guidelines\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eEnsure the power supply is installed in a clean, dry environment with adequate ventilation to maintain operating temperatures within the 0 to 60 deg C range.\u003c\/li\u003e\n\u003cli\u003eVerify that the input voltage selector switch is set correctly for your local power grid (115 VAC or 230 VAC) before applying power.\u003c\/li\u003e\n\u003cli\u003eAlways power down the rack and disconnect the main input supply before installing or removing the module to prevent electrical damage.\u003c\/li\u003e\n\u003cli\u003eEnsure the module is securely seated in the rack and that all backplane connections are fully engaged.\u003c\/li\u003e\n\u003cli\u003eWhen using the external battery backup, ensure the battery is correctly oriented in the external holder to prevent data loss.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\u003ch3\u003eDoes this power supply include the backup battery?\u003c\/h3\u003e\u003cp\u003eNo, the module provides the interface for the external battery (CA-6EW1000-7AA), which must be sourced separately and installed in the designated external holder.\u003c\/p\u003e\u003ch3\u003eIs this module compatible with S5-115U systems?\u003c\/h3\u003e\u003cp\u003eNo, this specific power supply is designed for the larger S5-135U, S5-150U, and S5-155U controller series. Please verify your controller model before installation.\u003c\/p\u003e","brand":"Siemens","offers":[{"title":"Default Title","offer_id":51004965847292,"sku":"6ES5955-3LF11","price":99.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0787\/9983\/1292\/files\/wm_1_f41837a9-cb1f-47ef-afcd-c8dcc716756e.jpg?v=1787417423","url":"https:\/\/www.electronicplc.com\/ar\/products\/6es5955-3lf11-siemens-simatic-s5-power-supply-module","provider":"Electronic PLC","version":"1.0","type":"link"}