# ANSI/IEEE Manually released latching device form Canonical URL: https://eloragrid.ai/symbols/ansi-manually-released-latching-device Publisher: Elora Grid Updated: 2026-10-28 Lookup label: Q1020604 Drawing use: Schematic Reference families: IEEE / ANSI, Manufacturer ## Symbol convention Convention: IEEE / ANSI Form: Latch Device with Manual Unlatching 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. Related representation: [Manually released latching device](https://eloragrid.ai/symbols/iec-manually-released-latching-device) IEEE-library form of manually released latching device: this qualifier identifies release of a latching mechanism by manual action. ## In plain English ### What does ANSI/IEEE Manually released latching device form mean? 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. ### A simple 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. ### What the drawings help you do 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. ### This particular reference 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. ### Terms - Normally open / normally closed: The contact state in the normal condition defined for the drawing. - Coil: A wound conductor that can produce a magnetic field when energised. - Signal: Electrical information passed between devices, rather than necessarily the main power supply. Concept diagram: Identify the device and form → Read the connections and state → Check the equipment reference A guide to reading this reference. The original symbol illustration and its drawing notes appear below; these boxes are not a wiring diagram. - [Autodesk IEEE Symbol Preview: Mechanical Controls, Latching Device](https://help.autodesk.com/cloudhelp/2021/ENU/AutoCAD-Electrical/files/GUID-646E84A5-5943-4E74-8EE6-2C330EDF97D2.htm) ## What it represents 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. ## How to read it - Show the reset or release device and the resulting rest condition. - Manual unlatching differs from de-energising an ordinary relay coil. ## Information to show or reference - 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. ## Important distinction Manual unlatching differs from de-energising an ordinary relay coil. ## Facts - Convention evidence: Autodesk IEEE Symbol Preview: Mechanical Controls, Latching Device; published form: Latch Device with Manual Unlatching. - Public vendor block: Q1020604. Vendor library token, not an IEEE symbol number. - Information added: Show the reset or release device and the resulting rest condition. - Preview: Independent educational concept; consult the publisher and applicable standard for the exact graphic - Artwork scope: Original educational geometry. Exact standard graphics, product ratings and terminal pinouts are not certified. ## Public references - [Autodesk IEEE Symbol Preview: Mechanical Controls, Latching Device](https://help.autodesk.com/cloudhelp/2021/ENU/AutoCAD-Electrical/files/GUID-646E84A5-5943-4E74-8EE6-2C330EDF97D2.htm) — Autodesk. 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. ## Graphic scope Independent original educational concept illustration by Elora Grid. Not a certified standards graphic or manufacturer footprint. Unitless; not to scale. Original artwork licence: https://creativecommons.org/licenses/by/4.0/. Publisher material is linked only.