{"schemaVersion":1,"slug":"station-analogue-scaling-interface","name":"Station analogue scaling interface","kind":"symbol","abbreviation":"SASI","aliases":["Substation automation and command interfaces","substations Substation automation and command interfaces","substations","Substations","Raw measurement and scale","Engineering-unit measurement"],"category":"measurement-protection","drawingTypes":["Schematic"],"referenceFamilies":["Manufacturer"],"summary":"Maps the source measurement representation to the assigned station engineering quantity.","description":["Maps the source measurement representation to the assigned station engineering quantity. Station automation collects measurements and statuses and issues assigned commands through defined authority paths. A communicated point has a value, quality and equipment identity; it should not be treated as an unexplained contact.","In a substation control building, the station controller receives bay information and forwards an operator's selected command to the correct bay device. Device feedback confirms whether the intended result actually occurred. For this reference, the drawing identifies “Raw measurement and scale” at the input and “Engineering-unit measurement” at the output. Scale and units require explicit configuration.","Document the point mapping, source, destination, command authority and failure behavior. A communication interface block explains information flow and does not certify network security or control-system availability. 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: Raw measurement and scale. Identify its source device or document and the state represented on the drawing.","Follow the named output: Engineering-unit measurement. Cross-reference its destination and separate the command from confirmation that the equipment responded.","Scale and units require explicit configuration.","Document the point mapping, source, destination, command authority and failure behavior. A communication interface block explains information flow and does not certify network security or control-system availability."],"drawingChecklist":["Label the source and connection reference for raw measurement and scale.","Identify the destination and defined state of engineering-unit measurement.","Record the equipment or control-document revision supporting this functional block.","Check this application limit in the project design: Scale and units require explicit configuration."],"distinction":"Scale and units require explicit configuration. 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":"Substations"},{"label":"Input / boundary","value":"Raw measurement and scale"},{"label":"Output / connection","value":"Engineering-unit measurement"},{"label":"Lookup label","value":"SASI is a library lookup label, not a standard device designation."}],"references":[{"sourceId":"pi26-station-automation","relevance":"Public technical context for substation automation and command interfaces. Station I/O, alarms, event recording, command and communications interfaces. The application text and educational graphic are independently authored; the publisher does not certify this representation."}],"related":["ga-substation-rtu","plc-digital-input","station-double-point-indication-interface"],"artwork":"pi26-station-analogue-scaling-interface","publishedOn":"2026-11-03","updatedOn":"2026-11-03","provenance":"independent-public-research","representation":{"type":"functional-block","focus":"substations","family":"station-automation","input":"Raw measurement and scale","output":"Engineering-unit measurement"},"plainEnglish":{"title":"What this block does","introduction":"Maps the source measurement representation to the assigned station engineering quantity.","example":"In a substation control building, the station controller receives bay information and forwards an operator's selected command to the correct bay device. Device feedback confirms whether the intended result actually occurred. For this reference, the drawing identifies “Raw measurement and scale” at the input and “Engineering-unit measurement” at the output. Scale and units require explicit configuration.","drawings":"Start at the named input: Raw measurement and scale. Identify its source device or document and the state represented on the drawing. Follow the named output: Engineering-unit measurement. Cross-reference its destination and separate the command from confirmation that the equipment responded.","terms":[{"name":"Input","meaning":"Raw measurement and scale"},{"name":"Output","meaning":"Engineering-unit measurement"},{"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":["Raw measurement and scale","SASI","Engineering-unit measurement"],"caption":"A reading guide. The entry's original illustration and input/output facts describe this application.","sources":[{"label":"SEL-2411 programmable automation controller","url":"https://selinc.com/products/2411/"}],"profileId":"power-installation-station-automation"},"url":"https://eloragrid.ai/symbols/station-analogue-scaling-interface","illustration":{"url":"https://eloragrid.ai/tools/electrical-library/illustrations/station-analogue-scaling-interface.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-automation","publisher":"SEL","title":"SEL-2411 programmable automation controller","url":"https://selinc.com/products/2411/","scope":"Station I/O, alarms, event recording, command and communications interfaces.","type":"manufacturer","checkedOn":"2026-11-03","reuse":"link-only","relevance":"Public technical context for substation automation and command interfaces. Station I/O, alarms, event recording, command and communications interfaces. The application text and educational graphic are independently authored; the publisher does not certify this representation."}]}