{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"6EP1933-2EC51","brand":"Siemens","brandSlug":"siemens","productSlug":"6EP1933-2EC51","canonicalUrl":"https://aoctrl.com/siemens/6EP1933-2EC51","factsUrl":"https://aoctrl.com/api/mcp/products/6EP1933-2EC51","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SITOP UPS500S uninterruptible power supply module, 6EP1933-2EC51, 24V DC input, 15 A rated output, 360 W, capacitor-based energy storage, snaps onto DIN rail EN 60715.","salesMarkdown":"## Capacitor-Backed Ride-Through for 24V DC Rails The Siemens 6EP1933-2EC51 is a SITOP UPS500S uninterruptible power supply module that bridges short mains dips on a 24V DC control bus. It takes 22 to 29 V DC input and delivers a regulated 24 V ± 3 % output at up to 15 A continuous, 360 W. The energy storage is capacitor-based, not battery — meaning no replacement cycle on the storage element and no cold-weather derating, but the buffer time is measured in seconds, not minutes. ## Rated Output and Buffer Dynamics Rated output current is 15 A in normal operation, with a peak capability of 25 A for short-duration loads. The module signals buffer status through three LED indicators and floating relay contacts: green OK when the input supply is above the cut-in threshold, yellow BAT when buffering, and red ALARM when the buffer is below 80 % remaining. A separate floating NO contact closes when the capacitor bank is above 85 % charged. The charging current is selectable at 1 A or 2 A, letting the installer match the inrush draw to the upstream power supply's headroom. Startup delay is 0.6 s typical, and the module meets EN 55022 Class B for conducted emissions and EN 61000-6-2 for industrial immunity. ## DIN Rail Mounting and Approvals The 125 × 120 × 125 mm (H × W × D) enclosure snaps onto 35 mm DIN rail per EN 60715. IP20 rated — intended for dry, enclosed control panels. Input and output connections are screw terminals: 2 terminals at input for 1 to 4 mm² / 17 to 11 AWG, and 4 terminals at output for the same range. Approvals include cULus-Listed to UL 508 and CSA C22.2 No. 107.1, cCSAus to UL 60950-1, CE, EAC, C-Tick, and shipbuilding approvals from ABS and DNV GL. MTBF at 40 °C is calculated at 459,137 hours.","metaTitle":"Siemens 6EP1933-2EC51 SITOP UPS500S, 24V DC 15A UPS Module","metaDescription":"Siemens 6EP1933-2EC51 SITOP UPS500S uninterruptible power supply module. 24V DC input, 15A rated output, 360W. Capacitor-based buffering.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["DIN Rail Power Supplies"],"specifications":{"Top":"50 mm","Left":"0 mm","Right":"0 mm","Bottom":"50 mm","C-Tick":"Yes","DNV GL":"Yes","At Input":"24 V DC: 2 screw terminals for 1 ... 4 mm²/17 ... 11 AWG","At Output":"24 V DC: 4 screw terminals for 1 ... 4 mm²/17 ... 11 AWG","CE marking":"Yes","Rated Value":"15 A","UL approval":"Yes","EAC approval":"Yes","Peak Current":"25 A","During Storage":"-40 ... +70 °C","MTBF at 40 °C":"459 137 h","lifecycle_stage":"current","Charging Current":"1 A, 2 A","During Operation":"0 ... 60 °C; with natural convection","During Transport":"-40 ... +70 °C","Fastening Method":"Snaps onto DIN rail EN 60715 35x7.5/15","In Buffering Mode":"Buffered mode: LED yellow (BAT), floating changeover contact \"OK/BAT\" to setting \"BAT\"; Prewarning buffer end after expiry of 80% of the available buffer time: LED red (ALARM), floating changeover contact \"ALARM/BAT\" to setting \"ALARM\"; Energy storage > 85%: LED green (BAT > 85%), floating NO contact \"BAT > 85\" closed","Other Information":"Specifications at rated input voltage and ambient temperature +25 °C (unless otherwise specified)","In Normal Operation":"0 ... 15 A","Input Voltage Range":"22 ... 29 V DC","as approval for USA":"cULus-Listed (UL 508, CSA C22.2 No. 107.1), File E197259; cCSAus (CSA C22.2 No. 60950-1, UL 60950-1)","protection class IP":"IP20","For Normal Operation":"Normal operation: LED green (OK), floating changeover contact \"OK/Bat\" to setting \"OK\" (\"OK\" means: Voltage of the supplying power supply unit is greater than cut-in threshold set at the DC UPS module); lack of buffer standby: LED red (ALARM), floating changeover contact \"ALARM/BAT\" to setting \"ALARM\"; energy storage > 85%: LED green (BAT > 85%), floating NO contact \"BAT > 85\" closed; permissible contact current capacity: DC 60 V/1 A or AC 30 V /1 A","Shipbuilding Approval":"ABS, DNV GL","Depth Of The Enclosure":"125 mm","Electrical Accessories":"Extension module SITOP UPS501S","Type Of Energy Storage":"with capacitors","Voltage Curve At Input":"DC","Width Of The Enclosure":"120 mm","Design Of The Interface":"USB","Height Of The Enclosure":"125 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":"360 W","Type Of Electrical Connection":"screw-type terminals","product component PC interface":"Yes","Energy Content Of Energy Storage":"5 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","For Control Circuit And Status Message":"10 screw terminals for 0.5 ... 2.5 mm²/20 ... 13 AWG","output voltage in buffering mode at DC":"24 ... 24.7 V","reference code according to IEC 81346-2":"RB","Adjustable Charging Current Maximum Note":"factory setting approx. 1 A","Property Of The Output Short-Circuit Proof":"Yes","Galvanic Isolation Between Input And Output":"No","American Bureau of Shipping Europe Ltd. (ABS)":"Yes","environmental category according to IEC 60721":"Climate class 3K3, 5 … 95% no condensation","Design Of The Mains Power Cut Bridging-Connection":"15 A for 9 s or 10 A for 15 s or 5 A for 31 s or 2 A for 76 s; longer buffering times with expansion modules","Voltage Increase Time Of The Output Voltage Typical":"25 ms","input current at rated input voltage 24 V rated value":"15.2 A; + approx. 2.3 A with empty energy storage (capacitor)","Adjustable Response Value Voltage For Buffer Connection":"22 ... 25.5 V; Adjustable in 0.5 V increments","Product Feature Of The Enclosure Housing Can Be Lined Up":"Yes","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":"9 W","Reverse Polarity Protection Against Energy Storage Unit Polarity Reversal":"Yes"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$327.66","priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=403068&mlfb=6EP1933-2EC51","alternativesUrl":"https://aoctrl.com/api/mcp/products/6EP1933-2EC51/alternatives.json"},"ai":{"faq":[{"question":"What is the backup time of the SITOP UPS500S (6EP1933-2EC51)?","answer":"The 6EP1933-2EC51 uses capacitor-based energy storage, so buffer time is measured in seconds rather than minutes. The exact duration depends on the load current and the capacitor charge state at the moment of input loss. The module signals when 80 % of the available buffer time has been consumed."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/6EP1933-2EC51","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/6EP1933-2EC51 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-09-02T08:15:54.622Z","lastPublished":"2026-09-02T08:15:54.622Z","indexable":true}}