{"schemaVersion":1,"slug":"room-alarm-acknowledgement-input","name":"Room alarm acknowledgement input","kind":"symbol","abbreviation":"RAAI","aliases":["Switchroom DC interfaces and alarm collection","switchrooms Switchroom DC interfaces and alarm collection","switchrooms","Switchrooms","Operator acknowledgement","Acknowledged alarm state"],"category":"installation-communications","drawingTypes":["Schematic"],"referenceFamilies":["Manufacturer"],"summary":"Receives acknowledgement without automatically clearing the underlying alarm condition.","description":["Receives acknowledgement without automatically clearing the underlying alarm condition. 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 “Operator acknowledgement” at the input and “Acknowledged alarm state” at the output. Acknowledgement and fault reset have different meanings.","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: Operator acknowledgement. Identify its source device or document and the state represented on the drawing.","Follow the named output: Acknowledged alarm state. Cross-reference its destination and separate the command from confirmation that the equipment responded.","Acknowledgement and fault reset have different meanings.","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 operator acknowledgement.","Identify the destination and defined state of acknowledged alarm state.","Record the equipment or control-document revision supporting this functional block.","Check this application limit in the project design: Acknowledgement and fault reset have different meanings."],"distinction":"Acknowledgement and fault reset have different meanings. 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":"Operator acknowledgement"},{"label":"Output / connection","value":"Acknowledged alarm state"},{"label":"Lookup label","value":"RAAI 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","room-alarm-reset-condition-block"],"artwork":"pi26-room-alarm-acknowledgement-input","publishedOn":"2026-11-03","updatedOn":"2026-11-03","provenance":"independent-public-research","representation":{"type":"functional-block","focus":"switchrooms","family":"room-dc","input":"Operator acknowledgement","output":"Acknowledged alarm state"},"plainEnglish":{"title":"What this block does","introduction":"Receives acknowledgement without automatically clearing the underlying alarm condition.","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 “Operator acknowledgement” at the input and “Acknowledged alarm state” at the output. Acknowledgement and fault reset have different meanings.","drawings":"Start at the named input: Operator acknowledgement. Identify its source device or document and the state represented on the drawing. Follow the named output: Acknowledged alarm state. Cross-reference its destination and separate the command from confirmation that the equipment responded.","terms":[{"name":"Input","meaning":"Operator acknowledgement"},{"name":"Output","meaning":"Acknowledged alarm state"},{"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":["Operator acknowledgement","RAAI","Acknowledged alarm state"],"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/room-alarm-acknowledgement-input","illustration":{"url":"https://eloragrid.ai/tools/electrical-library/illustrations/room-alarm-acknowledgement-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."}]}