{"schemaVersion":1,"slug":"illuminated-normally-closed-pushbutton","name":"Illuminated normally-closed pushbutton","kind":"symbol","abbreviation":"PB NC LAMP","aliases":["HPB12S75","VPB12S75"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"An illuminated NC pushbutton combines a normally-closed manual contact with a lamp in the operator assembly.","description":["An illuminated NC pushbutton combines a normally-closed manual contact with a lamp in the operator assembly. Contact operation and illumination can have different circuit sources."],"readingNotes":["Read the contact's unoperated state without assuming that illumination means it is actuated.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["State lamp voltage","Name indicated condition","Reference contact terminal pair"],"distinction":"A normally-closed contact function is independent of the lamp's on or off state.","facts":[{"label":"Drawing role","value":"Manual operation"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Public vendor block reference","value":"HPB12S75, VPB12S75 (Autodesk identifiers; not IEC symbol numbers)"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"pub-symbol-illuminated-pushbuttons","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["pushbutton-no","pushbutton-nc"],"artwork":"edu-illuminated-normally-closed-pushbutton","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/illuminated-normally-closed-pushbutton","illustration":{"url":"https://eloragrid.ai/library/illustrations/illuminated-normally-closed-pushbutton.svg","scope":"Original educational concept; not an official standard graphic or product footprint","license":"https://creativecommons.org/licenses/by/4.0/"},"sources":[{"id":"pub-symbol-illuminated-pushbuttons","title":"AutoCAD Electrical: Illuminated push buttons","publisher":"Autodesk","url":"https://help.autodesk.com/cloudhelp/2021/ENU/AutoCAD-Electrical/files/GUID-7B13B543-97A4-4A7E-8D08-49386A153A33.htm","type":"cad-reference","scope":"Public vendor catalogue naming and functional variants. Vendor block names are not IEC identifiers. Linked for reference; no graphics or CAD files are redistributed.","checkedOn":"2026-10-13","reuse":"link-only","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}]}