{"schemaVersion":1,"slug":"switchroom-battery-low-voltage-input","name":"Switchroom battery-low-voltage input","kind":"symbol","abbreviation":"SBI","aliases":["Switchroom DC interfaces and alarm collection","switchrooms Switchroom DC interfaces and alarm collection","switchrooms","Switchrooms","Battery voltage supervision","Low-battery alarm"],"category":"installation-communications","drawingTypes":["Schematic"],"referenceFamilies":["Manufacturer"],"summary":"Receives the defined low-voltage indication from the station battery system.","description":["Receives the defined low-voltage indication from the station battery system. A room DC interface connects station battery distribution, alarm contacts and operating circuits. DC supplies may remain energized when the room's normal AC supply is unavailable, so their source and distribution boundaries must be shown separately.","In a switchroom, the station battery can continue supplying protection and breaker controls during an AC supply interruption. The alarm system should distinguish charger loss from a low battery condition. For this reference, the drawing identifies “Battery voltage supervision” at the input and “Low-battery alarm” at the output. Voltage alone is not a complete capacity assessment.","Identify the DC source, returns and monitored branches. Do not infer battery autonomy, conductor polarity, isolation or earthing arrangements from a generic power block. The functional block is an independent explanation of this named application. Equipment-specific ratings, terminal connections and operating conditions must be established in the project documentation."],"readingNotes":["Start at the named input: Battery voltage supervision. Identify its source device or document and the state represented on the drawing.","Follow the named output: Low-battery alarm. Cross-reference its destination and separate the command from confirmation that the equipment responded.","Voltage alone is not a complete capacity assessment.","Identify the DC source, returns and monitored branches. Do not infer battery autonomy, conductor polarity, isolation or earthing arrangements from a generic power block."],"drawingChecklist":["Label the source and connection reference for battery voltage supervision.","Identify the destination and defined state of low-battery alarm.","Record the equipment or control-document revision supporting this functional block.","Check this application limit in the project design: Voltage alone is not a complete capacity assessment."],"distinction":"Voltage alone is not a complete capacity assessment. This reference describes the named application; it does not establish a new IEC graphical symbol, an ANSI device-function number or an exact manufacturer connection diagram.","facts":[{"label":"Representation","value":"Functional block"},{"label":"Installation focus","value":"Switchrooms"},{"label":"Input / boundary","value":"Battery voltage supervision"},{"label":"Output / connection","value":"Low-battery alarm"},{"label":"Lookup label","value":"SBI is a library lookup label, not a standard device designation."}],"references":[{"sourceId":"pi26-station-dc","relevance":"Public technical context for switchroom dc interfaces and alarm collection. Battery charging modes, DC distribution interfaces and charger alarms. The application text and educational graphic are independently authored; the publisher does not certify this representation."}],"related":["ga-station-dc-battery-rack","battery-charger-controller","switchroom-dc-feeder-loss-input"],"artwork":"pi26-switchroom-battery-low-voltage-input","publishedOn":"2026-11-03","updatedOn":"2026-11-03","provenance":"independent-public-research","representation":{"type":"functional-block","focus":"switchrooms","family":"room-dc","input":"Battery voltage supervision","output":"Low-battery alarm"},"plainEnglish":{"title":"What this block does","introduction":"Receives the defined low-voltage indication from the station battery system.","example":"In a switchroom, the station battery can continue supplying protection and breaker controls during an AC supply interruption. The alarm system should distinguish charger loss from a low battery condition. For this reference, the drawing identifies “Battery voltage supervision” at the input and “Low-battery alarm” at the output. Voltage alone is not a complete capacity assessment.","drawings":"Start at the named input: Battery voltage supervision. Identify its source device or document and the state represented on the drawing. Follow the named output: Low-battery alarm. Cross-reference its destination and separate the command from confirmation that the equipment responded.","terms":[{"name":"Input","meaning":"Battery voltage supervision"},{"name":"Output","meaning":"Low-battery alarm"},{"name":"Application reference","meaning":"An explanation of a named drawing function or circuit relationship; the project documents define the equipment and its connections."}],"diagram":"flow","steps":["Battery voltage supervision","SBI","Low-battery alarm"],"caption":"A reading guide. The entry's original illustration and input/output facts describe this application.","sources":[{"label":"MicroGenius S2/S4 battery charger technical manual","url":"https://www.sens-usa.com/hubfs/Controlled%20Files/Manuals/101330_MGS_User_Manual.pdf"}],"profileId":"power-installation-room-dc"},"url":"https://eloragrid.ai/symbols/switchroom-battery-low-voltage-input","illustration":{"url":"https://eloragrid.ai/tools/electrical-library/illustrations/switchroom-battery-low-voltage-input.svg","scope":"Original educational concept; not an official standard graphic or product footprint","license":"https://creativecommons.org/licenses/by/4.0/"},"sources":[{"id":"pi26-station-dc","publisher":"SENS","title":"MicroGenius S2/S4 battery charger technical manual","url":"https://www.sens-usa.com/hubfs/Controlled%20Files/Manuals/101330_MGS_User_Manual.pdf","scope":"Battery charging modes, DC distribution interfaces and charger alarms.","type":"manufacturer","checkedOn":"2026-11-03","reuse":"link-only","relevance":"Public technical context for switchroom dc interfaces and alarm collection. Battery charging modes, DC distribution interfaces and charger alarms. The application text and educational graphic are independently authored; the publisher does not certify this representation."}]}