{"schemaVersion":1,"slug":"normally-open-limit-switch","name":"Normally-open limit switch","kind":"symbol","abbreviation":"LS NO","aliases":["HLS11","VLS11","NO limit switch"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"A normally-open limit switch closes when the documented mechanical travel or position condition actuates it.","description":["A normally-open limit switch closes when the documented mechanical travel or position condition actuates it. It identifies a position input rather than the complete mechanical arrangement."],"readingNotes":["State which equipment position actuates the switch.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["Name monitored position","Label actuator reference","Show contact terminals"],"distinction":"A limit switch responds to mechanical position; a pushbutton responds to an operator action.","facts":[{"label":"Drawing role","value":"Actuated indication"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Public vendor block reference","value":"HLS11, VLS11 (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-limits","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["plc-io","normally-open-contact"],"artwork":"edu-normally-open-limit-switch","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/normally-open-limit-switch","illustration":{"url":"https://eloragrid.ai/library/illustrations/normally-open-limit-switch.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-limits","title":"AutoCAD Electrical: Limit switches","publisher":"Autodesk","url":"https://help.autodesk.com/cloudhelp/2021/ENU/AutoCAD-Electrical/files/GUID-3CF4BE45-A302-4757-B5C9-C1AFF9BDC512.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."}]}