Q021208
Mechanical stop-latch indication
A stop-latch indication identifies a mechanically retained control position.
IEC
IEEE / ANSI · Q021208
ANSI/IEEE Mechanical stop-latch indication form
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.
- 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.
Read the source: Autodesk IEEE Symbol Preview: Mechanical Controls
IEEE / ANSI · 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.
Shown as an independently authored educational illustration. Use the cited publication and drawing legend to verify the required drafting form.
Schematic · Q021208
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.
A distinction that matters
A stop latch is distinct from a timer holding a circuit electrically.
Sources you can follow
These public references support the explanation and provide further detail. Their graphics and downloadable files remain with their publishers.
Autodesk IEEE Symbol Preview: Mechanical Controls
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.
About this graphic
This illustration was authored independently by Elora Grid to explain the concept. It is not reproduced from a customer drawing, an official standard graphic or a manufacturer CAD file. Its correspondence to an exact IEC or IEEE symbol identifier has not been certified.
SVG and DXF downloads contain this original artwork. DXF uses unscaled drawing units; a GA envelope supplies no product dimensions, clearances or fabrication information. Original artwork is available under CC BY 4.0. Third-party references retain their own terms.
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