{"schemaVersion":1,"slug":"ansi-mechanical-stop-latch-indication","name":"ANSI/IEEE Mechanical stop-latch indication form","kind":"symbol","abbreviation":"Q021208","aliases":["Q021208","IEEE Auto Non Return Stop Latch","ANSI Mechanical stop-latch indication"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEEE / ANSI","Manufacturer"],"summary":"IEEE-library form of mechanical stop-latch indication: a stop-latch indication identifies a mechanically retained control position.","description":["This reference locates mechanical stop-latch indication in Autodesk's IEEE-oriented mechanical controls family. A stop-latch indication identifies a mechanically retained control position. A stop latch mechanically retains a position until its specified release action occurs. The mechanism state can be maintained without an electrical holding coil remaining energised. The public library uses Q021208 for its horizontal representation; this is a vendor block name, not an IEEE standards symbol number.","Read the operating mechanism and the contact reference state together. Cross-reference every associated contact to the same device and show which movement, signal or reset changes its condition; the symbol alone does not establish the complete switching sequence.","Identify the retained movement and the release/reset path. If position is reported electrically, cross-reference the feedback contact rather than assuming the latch indication supplies that signal. Specify the release action and the controlled device relationship. A stop latch is distinct from a timer holding a circuit electrically. The linked functional counterpart explains the same operating role in its own drawing context; agreement of every detailed convention mark is not asserted."],"readingNotes":["Specify the release action and the controlled device relationship.","A stop latch is distinct from a timer holding a circuit electrically."],"drawingChecklist":["Identify the associated device, circuit or diagram boundary.","Specify the release action and the controlled device relationship.","Cross-reference the equipment data, terminal mapping or operating-state legend needed to interpret the form."],"distinction":"A stop latch is distinct from a timer holding a circuit electrically.","facts":[{"label":"Convention evidence","value":"Autodesk IEEE Symbol Preview: Mechanical Controls; published form: Auto Non Return Stop Latch."},{"label":"Public vendor block","value":"Q021208. Vendor library token, not an IEEE symbol number."},{"label":"Information added","value":"Specify the release action and the controlled device relationship."},{"label":"Preview","value":"Independent educational concept; consult the publisher and applicable standard for the exact graphic"},{"label":"Artwork scope","value":"Original educational geometry. Exact standard graphics, product ratings and terminal pinouts are not certified."}],"references":[{"sourceId":"s28-ieee-mechanical-controls","relevance":"Public IEEE-oriented Mechanical Controls table explicitly lists Q021208 as Auto Non Return Stop Latch. This supports the vendor convention context, not reproduction of the publisher graphic."}],"related":["iec-mechanical-stop-latch-indication","relay-coil","normally-open-contact"],"artwork":"s28-ansi-mechanical-stop-latch-indication","publishedOn":"2026-10-28","updatedOn":"2026-10-28","provenance":"independent-public-research","symbolVariant":{"convention":"IEEE / ANSI","form":"Auto Non Return Stop Latch","reference":"Autodesk IEEE Symbol Preview: Mechanical Controls, block Q021208. Matching functional counterpart linked separately. Independently drawn educational geometry; not a certified IEEE glyph or database identifier.","counterpart":"iec-mechanical-stop-latch-indication"},"plainEnglish":{"title":"What does ANSI/IEEE Mechanical stop-latch indication form mean?","introduction":"This reference locates mechanical stop-latch indication in Autodesk's IEEE-oriented mechanical controls family. A stop-latch indication identifies a mechanically retained control position. A stop latch mechanically retains a position until its specified release action occurs. The mechanism state can be maintained without an electrical holding coil remaining supplied with operating power. The public library uses Q021208 for its horizontal representation; this is a vendor block name, not an IEEE standards symbol number.","example":"Read the operating mechanism and the contact reference state together. Cross-reference every associated contact to the same device and show which movement, signal or reset changes its condition; the symbol alone does not establish the complete switching sequence.","drawings":"Identify the retained movement and the release/reset path. If position is reported electrically, cross-reference the feedback contact rather than assuming the latch indication supplies that signal. Specify the release action and the controlled device relationship. A stop latch is distinct from a timer holding a circuit electrically. The linked functional counterpart explains the same operating role in its own drawing context; agreement of every detailed convention mark is not asserted.","terms":[{"name":"Normally open / normally closed","meaning":"The contact state in the normal condition defined for the drawing."},{"name":"Coil","meaning":"A wound conductor that can produce a magnetic field when energised."},{"name":"Signal","meaning":"Electrical information passed between devices, rather than necessarily the main power supply."}],"diagram":"flow","steps":["Identify the device and form","Read the connections and state","Check the equipment reference"],"caption":"A guide to reading this reference. The original symbol illustration and its drawing notes appear below; these boxes are not a wiring diagram.","sources":[{"label":"Autodesk IEEE Symbol Preview: Mechanical Controls","url":"https://help.autodesk.com/cloudhelp/2021/ENU/AutoCAD-Electrical/files/GUID-450F6FD7-7A10-4F81-92A1-0D9BECFB23FC.htm"}],"detail":"IEEE-library form of mechanical stop-latch indication: a stop-latch indication identifies a mechanically retained control position. A stop latch is distinct from a timer holding a circuit electrically.","profileId":"reviewed-symbol-20261028"},"url":"https://eloragrid.ai/symbols/ansi-mechanical-stop-latch-indication","illustration":{"url":"https://eloragrid.ai/tools/electrical-library/illustrations/ansi-mechanical-stop-latch-indication.svg","scope":"Original educational concept; not an official standard graphic or product footprint","license":"https://creativecommons.org/licenses/by/4.0/"},"sources":[{"id":"s28-ieee-mechanical-controls","title":"Autodesk IEEE Symbol Preview: Mechanical Controls","publisher":"Autodesk","url":"https://help.autodesk.com/cloudhelp/2021/ENU/AutoCAD-Electrical/files/GUID-450F6FD7-7A10-4F81-92A1-0D9BECFB23FC.htm","type":"cad-reference","scope":"Public mechanical controls family names and vendor block tokens. Horizontal, vertical and rotated placements are not separate engineering functions. Exact standard geometry is not reproduced.","checkedOn":"2026-10-28","reuse":"link-only","relevance":"Public IEEE-oriented Mechanical Controls table explicitly lists Q021208 as Auto Non Return Stop Latch. This supports the vendor convention context, not reproduction of the publisher graphic."}]}