{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"6AG1931-2EC21-2AA0","brand":"Siemens","brandSlug":"siemens","productSlug":"6AG1931-2EC21-2AA0","canonicalUrl":"https://aoctrl.com/siemens/6AG1931-2EC21-2AA0","factsUrl":"https://aoctrl.com/api/mcp/products/6AG1931-2EC21-2AA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SITOP DC UPS module, 24 V DC, 15 A, 50 mm wide, screw terminals.","salesMarkdown":"## DC UPS Module for 24 V Control Power This Siemens 6AG1931-2EC21-2AA0 is a DC uninterruptible power supply module designed to buffer 24 V DC control and instrumentation loads. Rated for 15 A continuous (peak 15.7 A), it takes a 22...29 V DC input and delivers output voltage equal to input minus 0.5 V typical, or 19...28.5 V in buffered mode. The module snaps onto a DIN rail EN 60715 and measures 50 mm wide by 125 mm high by 125 mm deep, with screw terminals for power and signaling. The 15 A continuous rating is the maximum load current under normal operation; the module can supply this indefinitely at rated input voltage. The charging current is selectable between 0.35 A and 0.7 A, so match the battery module size to the buffer time you need. The buffered mode output range (19...28.5 V) covers the voltage window from a discharged to fully charged battery, important for downstream equipment with narrow voltage tolerance. Status is reported via floating contacts and LEDs: a green LED indicates normal operation with input above cut-in threshold; a yellow LED signals buffered mode; a red LED and flashing alarm indicate low battery (<20.4 V) or battery replacement needed. The floating changeover contacts (DC 60 V/1 A or AC 30 V/1 A) give the PLC a reliable indication of system health. The enclosure is 50 mm wide with 0 mm left/right clearance and 50 mm top/bottom clearance. Screw terminals accept 1...4 mm² for power (2 input, 4 output) and 0.5...2.5 mm² for control (10 terminals).","metaTitle":"Siemens 6AG1931-2EC21-2AA0 DC UPS, 24 V DC, 15 A","metaDescription":"Siemens SITOP DC UPS module, 24 V DC, 15 A continuous, 50 mm wide. DIN rail mount, status contacts, EN 55022 Class B. Active lifecycle, quoted to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["PLCs (Programmable Logic Controllers)"],"specifications":{"Top":"50 mm","Left":"0 mm","Right":"0 mm","title":"6AG1931-2EC21-2AA0","Bottom":"50 mm","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","description":"SIPLUS PS DC-UPS 24 V/15 A based on 6EP1931-2EC21 with conformal coating, -25…+60 °C,","Peak Current":"15.7 A","MTBF at 40 °C":"791 139 h","lifecycle_stage":"current","Charging Current":"0.35 A, 0.7 A","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 battery voltage < 20.4 VDC: 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","protection class IP":"IP20","For Normal Operation":"Normal operation: LED green (OK), floating changeover contact \"Bat/OK\" 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\"; Battery replacement required: LED red (alarm) flashing with approx. 0.25 Hz, floating changeover contact \"Alarm/Bat\" switching with approx. 0.25 Hz; 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","Depth Of The Enclosure":"125 mm","Electrical Accessories":"Battery module","Type Of Energy Storage":"with batteries","Voltage Curve At Input":"DC","Width Of The Enclosure":"50 mm","Design Of The Interface":"without","Height Of The Enclosure":"125 mm","For Emitted Interference":"EN 55022 Class B","For Interference Immunity":"EN 61000-6-2","Formula For Output Voltage":"Vin - approx. 0.5 V","Startup Delay Time Typical":"1 s","Supplied Active Power Typical":"360 W","Type Of Electrical Connection":"screw-type terminals","product component PC interface":"No","For Rechargeable Battery Module":"24 V DC: 2 screw terminals for 1 ... 4 mm²/17 ... 11 AWG","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":"19 ... 28.5 V","reference code according to IEC 81346-2":"RB","Adjustable Charging Current Maximum Note":"factory setting approx. 0.7 A","Property Of The Output Short-Circuit Proof":"Yes","Galvanic Isolation Between Input And Output":"No","Ambient Temperature During Storage And Transport":"-40 ... +85","Design Of The Mains Power Cut Bridging-Connection":"Dependent on connected battery and load current, see selection table battery module and mains buffering times as well as the relevant important information notes!","Voltage Increase Time Of The Output Voltage Typical":"60 ms","In Case Of Operation On Rechargeable Battery Typical":"15 W","input current at rated input voltage 24 V rated value":"15 A; + approx. 1 A with empty battery","Adjustable Response Value Voltage For Buffer Connection":"22 ... 25.5 V; Adjustable in 0.5 V increments","Installation Altitude At Height Above Sea Level Maximum":"6 000 m","Product Feature Of The Enclosure Housing Can Be Lined Up":"Yes","Adjustable Response Value Voltage For Buffer Connection Preset":"22.5 V","Chemical Resistance To Commercially Available Cooling Lubricants":"Yes; incl. diesel and oil droplets in the air","Reverse Polarity Protection Against Input Voltage Polarity Reversal":"Yes","Ambient Temperature In Horizontal Mounting Position During Operation":"-25 ... +60; with natural convection","At Rated Output Voltage For Rated Value Of The Output Current Typical":"14 W","Reverse Polarity Protection Against Energy Storage Unit Polarity Reversal":"Yes","Ambient Condition Relating To Ambient Temperature - Air Pressure - Installation Altitude":"In case of operation at altitudes of 2000 - 6000 m above sea level: Output power derating of -7.5 %/1000 m or reduction of the ambient temperature by 5 K/1000 m","product conformity of the coating Qualification and Performance of Electrical Insulating Compound for Printed Board Assemblies according to IPC-CC-830A":"Yes; Conformal Coating, Class A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$381.00","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/41812a9746c832cf0b6a8f12a452dad3.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=228734&mlfb=6AG1931-2EC21-2AA0"},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/6AG1931-2EC21-2AA0","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/6AG1931-2EC21-2AA0 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}}