{"schemaVersion":1,"slug":"iec-mechanical-interlock-between-devices","name":"Mechanical interlock between devices","kind":"symbol","abbreviation":"Q021211","aliases":["Mechanical interlock between devices symbol","Q021211","Mechanical interlock between devices IEC reference"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"A mechanical interlock indication links devices whose movements are constrained by a physical relationship.","description":["A mechanical interlock indication links devices whose movements are constrained by a physical relationship. A physical interlock constrains the movements of two associated mechanisms. It remains a mechanical relationship even when the electrical circuit also contains permissive contacts.","Use both device tags and the intended exclusive positions to make the relationship readable. Draw any electrical feedback or auxiliary interlock contact separately, since it represents another interface."],"readingNotes":["Identify both devices and the prohibited simultaneous condition.","Mechanical interlocking differs from an electrical interlock contact or software permissive."],"drawingChecklist":["Identify the associated device, circuit or diagram boundary.","Identify both devices and the prohibited simultaneous condition.","Cross-reference the equipment data, terminal mapping or operating-state legend needed to interpret the form."],"distinction":"Mechanical interlocking differs from an electrical interlock contact or software permissive.","facts":[{"label":"Reference scope","value":"Specific public IEC-context family form"},{"label":"Publisher reference token","value":"Q021211 (Autodesk token; not a verified IEC database ID)"},{"label":"Information added","value":"Identify both devices and the prohibited simultaneous condition."},{"label":"Preview","value":"Independent educational concept; consult the publisher and applicable standard for the exact graphic"}],"references":[{"sourceId":"iec-public-mechanical","relevance":"Official public publisher family name and reference context; vendor identifiers and graphics are distinct from licensed IEC database content."}],"related":["relay-coil","normally-open-contact"],"artwork":"edu-iec-mechanical-interlock-between-devices","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEC","form":"Mechanical interlock between devices","reference":"Autodesk IEC-60617 Symbol Preview — Mechanical return and interlock qualifiers; vendor family reference, not certified IEC geometry or database identifier."},"url":"https://eloragrid.ai/symbols/iec-mechanical-interlock-between-devices","illustration":{"url":"https://eloragrid.ai/library/illustrations/iec-mechanical-interlock-between-devices.svg","scope":"Original educational concept; not an official standard graphic or product footprint","license":"https://creativecommons.org/licenses/by/4.0/"},"sources":[{"id":"iec-public-mechanical","title":"Autodesk IEC-60617 preview: Mechanical return and interlock qualifiers","publisher":"Autodesk","url":"https://help.autodesk.com/cloudhelp/2021/ENU/AutoCAD-Electrical/files/GUID-084BF99C-FD3E-4ECF-A86B-608EF93DF6E5.htm","type":"cad-reference","scope":"Public publisher IEC-context family names and vendor block references. No vendor images or CAD library files are reproduced, and vendor tokens are not presented as verified IEC database identifiers.","checkedOn":"2026-10-14","reuse":"link-only","relevance":"Official public publisher family name and reference context; vendor identifiers and graphics are distinct from licensed IEC database content."}]}