# ANSI/IEEE Mechanical stop-latch indication form Canonical URL: https://eloragrid.ai/symbols/ansi-mechanical-stop-latch-indication Publisher: Elora Grid Updated: 2026-10-28 Lookup label: Q021208 Drawing use: Schematic Reference families: IEEE / ANSI, Manufacturer ## Symbol convention Convention: IEEE / ANSI Form: Auto Non Return Stop Latch 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. Related representation: [Mechanical stop-latch indication](https://eloragrid.ai/symbols/iec-mechanical-stop-latch-indication) IEEE-library form of mechanical stop-latch indication: a stop-latch indication identifies a mechanically retained control position. ## In plain English ### What does ANSI/IEEE Mechanical stop-latch indication form mean? 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. ### 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 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. ### This particular reference 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. ### 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](https://help.autodesk.com/cloudhelp/2021/ENU/AutoCAD-Electrical/files/GUID-450F6FD7-7A10-4F81-92A1-0D9BECFB23FC.htm) ## What it represents 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. ## How to read it - Specify the release action and the controlled device relationship. - A stop latch is distinct from a timer holding a circuit electrically. ## Information to show or reference - 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. ## Important distinction A stop latch is distinct from a timer holding a circuit electrically. ## Facts - Convention evidence: Autodesk IEEE Symbol Preview: Mechanical Controls; published form: Auto Non Return Stop Latch. - Public vendor block: Q021208. Vendor library token, not an IEEE symbol number. - Information added: Specify the release action and the controlled device relationship. - 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](https://help.autodesk.com/cloudhelp/2021/ENU/AutoCAD-Electrical/files/GUID-450F6FD7-7A10-4F81-92A1-0D9BECFB23FC.htm) — Autodesk. 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. ## 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.