{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"6EP1933-2NC11","brand":"Siemens","brandSlug":"siemens","productSlug":"6EP1933-2NC11","canonicalUrl":"https://aoctrl.com/siemens/6EP1933-2NC11","factsUrl":"https://aoctrl.com/api/mcp/products/6EP1933-2NC11","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SITOP DC buffer module, 6EP1933-2NC11, 24 V ±3 % output, 168 W, IP65, capacitor-based energy storage.","salesMarkdown":"The Siemens 6EP1933-2NC11 is a DC buffer module that holds up the 24 V DC bus through short mains dips using internal capacitor storage. Rated for 7 A continuous output with a peak of 22.5 A, it delivers 168 W of active power and stores 10 kW·s of energy — enough to ride through a typical half-cycle dropout or sequence a controlled shutdown. The IP65 enclosure (470 mm wide × 80 mm deep × 80 mm high) makes it suitable for washdown areas or dusty environments where a standard IP20 buffer would need a separate cabinet. The 24 V ±3 % output matches the standard 24 VDC control voltage. The 7 A continuous rating covers a moderate control cabinet. The 22.5 A peak handles inrush loads. Screw mounting — no DIN-rail clip, so plan for four fasteners through the enclosure flanges. The 470 mm width is substantial; it will not fit a standard cabinet depth if rear access is needed. ## Connections and indicators Power connections are via plug-in connector sets — no hardwired terminals, so you can pre-wire the cabinet and slide the module in last. A USB interface is on board for PC-based diagnostics or firmware updates. Status LEDs give clear feedback: green (OK) for normal operation, yellow (BAT) when buffering, red (ALARM) for pre-warning or lack of buffer standby, and green (CAP. > 85%) when the capacitor bank is charged above 85 %. That last one is handy during commissioning — you can see at a glance whether the module is ready to ride through a dip.","metaTitle":"Siemens 6EP1933-2NC11 DC Buffer Module, 24 V, 168 W, IP65","metaDescription":"Siemens 6EP1933-2NC11 DC buffer module with capacitor storage, 24 V ±3% output, 168 W, IP65, EN 55022 Class B. Active production, sourced to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Power Supplies"],"specifications":{"Left":"0 mm","Right":"0 mm","title":"6EP1933-2NC11","C-Tick":"No","DNV GL":"No","At Input":"via connector set","At Output":"via connector set","CE marking":"Yes","Rated Value":"7 A","UL approval":"No","description":"********** spare part ********* SITOP UPS500P maintenance-free uninterruptible power supply with USB interface basic device 10 kWs input: 24 V DC output: 24 V DC/7 A degree of protection IP65","EAC approval":"Yes","Peak Current":"22.5 A","During Storage":"-40 ... +70 °C","MTBF at 40 °C":"500 000 h","lifecycle_stage":"current","Charging Current":"2 A","During Operation":"0 ... 55 °C; with natural convection","During Transport":"-40 ... +70 °C","Fastening Method":"Screw mounting","In Buffering Mode":"Buffered mode: LED yellow (BAT); Prewarning buffer end after expiry of 80% of the available buffer time: LED red (ALARM); Energy storage > 85%: LED green (CAP. > 85%)","Other Information":"Specifications at rated input voltage and ambient temperature +25 °C (unless otherwise specified)","In Normal Operation":"0 ... 7 A","Input Voltage Range":"22.5 ... 29 V DC","protection class IP":"IP65","For Normal Operation":"Normal operation: LED green (OK); Lack of buffer standby: LED red (ALARM); Energy storage > 85%: LED green (CAP. > 85%)","Depth Of The Enclosure":"80 mm","Electrical Accessories":"Connector set","Type Of Energy Storage":"with capacitors","Voltage Curve At Input":"DC","Width Of The Enclosure":"470 mm","Design Of The Interface":"USB","Height Of The Enclosure":"80 mm","For Emitted Interference":"EN 55022 Class B","For Interference Immunity":"EN 61000-6-2","Formula For Output Voltage":"24 V ± 3 %","Startup Delay Time Typical":"0.6 s","Supplied Active Power Typical":"168 W","Type Of Electrical Connection":"Plug-in connection","product component PC interface":"Yes","Energy Content Of Energy Storage":"10 kW.s","supply voltage at DC rated value":"24 V","Operating Resource Protection Class":"Class III","in buffering mode at DC rated value":"24 V","in normal operation at DC rated value":"24 V","output voltage in buffering mode at DC":"24 ... 24.7 V","reference code according to IEC 81346-2":"RB","Adjustable Charging Current Maximum Note":"permanently set","Galvanic Isolation Between Input And Output":"No","environmental category according to IEC 60721":"Climate class 3K3, 5 … 95% no condensation","Design Of The Mains Power Cut Bridging-Connection":"7 A for 49 s or 5 A for 68 s or 3 A for 108 s or 1 A for 351 s","Voltage Increase Time Of The Output Voltage Typical":"25 ms","input current at rated input voltage 24 V rated value":"7 A; + approx. 2 A with empty energy storage (capacitor)","Adjustable Response Value Voltage For Buffer Connection":"permanently set","Product Feature Of The Enclosure Housing Can Be Lined Up":"No","Adjustable Response Value Voltage For Buffer Connection Preset":"22.5 V","Reverse Polarity Protection Against Input Voltage Polarity Reversal":"Yes","At Rated Output Voltage For Rated Value Of The Output Current Typical":"5.2 W","Reverse Polarity Protection Against Energy Storage Unit Polarity Reversal":"Yes"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$1,101.00","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/ac5f6bc54f0768f812d3de68989e692b.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=22035&mlfb=6EP1933-2NC11"},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/6EP1933-2NC11","citationPolicyUrl":"https://aoctrl.com/llms.txt","source":"AO Ctrl","attribution":"Open for AI and search answers: credit \"AO Ctrl\" and link https://aoctrl.com/siemens/6EP1933-2NC11 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:51:03.652Z","lastPublished":"2026-08-11T15:51:03.652Z","indexable":true}}