{"product_id":"6es5-955-3nf42-siemens-simatic-s5-ps955-power-supply-module","title":"Siemens 6ES5955-3NF42 Simatic S5 PS955 Power Supply Module","description":"\u003ch3\u003eDescription\u003c\/h3\u003e\u003cp\u003eThe Siemens Simatic S5 6ES5 955-3NF42 is a high-capacity power supply module engineered for the S5-135U and S5-155U automation systems. This unit provides regulated DC power to central controllers and expansion subracks, ensuring stable operation for high-density PLC installations. By converting 24 VDC input into a robust 5 VDC output at 40 A, this module supports the demanding power requirements of large-scale industrial control architectures, including those found in power generation and chemical processing facilities.\u003c\/p\u003e\u003ch3\u003eFeatures\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eDesigned for S5-135U, S5-155U, and EU 185U subrack compatibility.\u003c\/li\u003e\n\u003cli\u003eIntegrated pulse-width modulation (PWM) for stable voltage regulation under varying loads.\u003c\/li\u003e\n\u003cli\u003eBuilt-in protection features including overvoltage crowbar, thermal overload shutdown, and transient sag filtering.\u003c\/li\u003e\n\u003cli\u003eDedicated interface for external backup battery support to ensure RAM data integrity.\u003c\/li\u003e\n\u003cli\u003eEngineered for high-temperature environments with integrated forced-air cooling channels.\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 955-3NF42\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 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\u003ctr\u003e\n\u003ctd\u003eBattery Compatibility\u003c\/td\u003e\n\u003ctd\u003eCA-6EW1000-7AA (External)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch3\u003eInstallation Guidelines\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eEnsure the PLC rack is powered down before installing or removing the power supply module.\u003c\/li\u003e\n\u003cli\u003eVerify that the input voltage matches the 24 VDC specification before connection to prevent damage.\u003c\/li\u003e\n\u003cli\u003eEnsure the module is fully seated in the subrack to maintain proper backplane contact.\u003c\/li\u003e\n\u003cli\u003eMaintain clear airflow paths around the module to allow the integrated cooling system to function effectively.\u003c\/li\u003e\n\u003cli\u003eUse shielded cabling for power inputs to minimize EMI interference in high-noise industrial environments.\u003c\/li\u003e\n\u003cli\u003eHandle the unit using standard ESD precautions to protect internal solid-state components.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\u003ch3\u003eDoes this module support battery backup?\u003c\/h3\u003e\u003cp\u003eYes, the 6ES5 955-3NF42 includes an interface for an external backup battery (typically the CA-6EW1000-7AA) to maintain RAM data during power loss.\u003c\/p\u003e\u003ch3\u003eWhat systems is this power supply compatible with?\u003c\/h3\u003e\u003cp\u003eThis module is specifically designed for Siemens Simatic S5-135U and S5-155U central controllers, as well as the EU 185U expansion subracks.\u003c\/p\u003e","brand":"Siemens","offers":[{"title":"Default Title","offer_id":51002112311548,"sku":"6ES5955-3NF42","price":99.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0787\/9983\/1292\/files\/wm_1_7752ff31-e79a-48b5-88a8-03bc2320acec.jpg?v=1787334217","url":"https:\/\/www.electronicplc.com\/es\/products\/6es5-955-3nf42-siemens-simatic-s5-ps955-power-supply-module","provider":"Electronic PLC","version":"1.0","type":"link"}