{"schemaVersion":1,"slug":"ansi-manually-released-latching-device","name":"ANSI/IEEE Manually released latching device form","kind":"symbol","abbreviation":"Q1020604","aliases":["Q1020604","IEEE Latch Device with Manual Unlatching","ANSI Manually released latching device"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEEE / ANSI","Manufacturer"],"summary":"IEEE-library form of manually released latching device: this qualifier identifies release of a latching mechanism by manual action.","description":["This reference locates manually released latching device in Autodesk's IEEE-oriented mechanical controls, latching device family. This qualifier identifies release of a latching mechanism by manual action. The retained mechanism is released through a documented manual action. Resetting the mechanism and removing electrical supply can be different events. The public library uses Q1020604 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.","Show the manual release and the resulting position relationship. Where the latch also reports status, identify that feedback as a separate contact or sensor interface. Show the reset or release device and the resulting rest condition. Manual unlatching differs from de-energising an ordinary relay coil. The linked functional counterpart explains the same operating role in its own drawing context; agreement of every detailed convention mark is not asserted."],"readingNotes":["Show the reset or release device and the resulting rest condition.","Manual unlatching differs from de-energising an ordinary relay coil."],"drawingChecklist":["Identify the associated device, circuit or diagram boundary.","Show the reset or release device and the resulting rest condition.","Cross-reference the equipment data, terminal mapping or operating-state legend needed to interpret the form."],"distinction":"Manual unlatching differs from de-energising an ordinary relay coil.","facts":[{"label":"Convention evidence","value":"Autodesk IEEE Symbol Preview: Mechanical Controls, Latching Device; published form: Latch Device with Manual Unlatching."},{"label":"Public vendor block","value":"Q1020604. Vendor library token, not an IEEE symbol number."},{"label":"Information added","value":"Show the reset or release device and the resulting rest condition."},{"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-latching-device","relevance":"Public IEEE-oriented Mechanical Controls, Latching Device table explicitly lists Q1020604 as Latch Device with Manual Unlatching. This supports the vendor convention context, not reproduction of the publisher graphic."}],"related":["iec-manually-released-latching-device","relay-coil","normally-open-contact"],"artwork":"s28-ansi-manually-released-latching-device","publishedOn":"2026-10-28","updatedOn":"2026-10-28","provenance":"independent-public-research","symbolVariant":{"convention":"IEEE / ANSI","form":"Latch Device with Manual Unlatching","reference":"Autodesk IEEE Symbol Preview: Mechanical Controls, Latching Device, block Q1020604. Matching functional counterpart linked separately. Independently drawn educational geometry; not a certified IEEE glyph or database identifier.","counterpart":"iec-manually-released-latching-device"},"plainEnglish":{"title":"What does ANSI/IEEE Manually released latching device form mean?","introduction":"This reference locates manually released latching device in Autodesk's IEEE-oriented mechanical controls, latching device family. This additional drawing mark identifies release of a latching mechanism by manual action. The retained mechanism is released through a documented manual action. Resetting the mechanism and removing electrical supply can be different events. The public library uses Q1020604 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":"Show the manual release and the resulting position relationship. Where the latch also reports status, identify that feedback as a separate contact or sensor interface. Show the reset or release device and the resulting rest condition. Manual unlatching differs from de-energising an ordinary relay coil. 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, Latching Device","url":"https://help.autodesk.com/cloudhelp/2021/ENU/AutoCAD-Electrical/files/GUID-646E84A5-5943-4E74-8EE6-2C330EDF97D2.htm"}],"detail":"IEEE-library form of manually released latching device: this additional drawing mark identifies release of a latching mechanism by manual action. Manual unlatching differs from de-energising an ordinary relay coil.","profileId":"reviewed-symbol-20261028"},"url":"https://eloragrid.ai/symbols/ansi-manually-released-latching-device","illustration":{"url":"https://eloragrid.ai/tools/electrical-library/illustrations/ansi-manually-released-latching-device.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-latching-device","title":"Autodesk IEEE Symbol Preview: Mechanical Controls, Latching Device","publisher":"Autodesk","url":"https://help.autodesk.com/cloudhelp/2021/ENU/AutoCAD-Electrical/files/GUID-646E84A5-5943-4E74-8EE6-2C330EDF97D2.htm","type":"cad-reference","scope":"Public mechanical controls, latching device 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, Latching Device table explicitly lists Q1020604 as Latch Device with Manual Unlatching. This supports the vendor convention context, not reproduction of the publisher graphic."}]}