LS NO
Normally-open limit switch
A normally-open limit switch closes when the documented mechanical travel or position condition actuates it.
Schematic
IEEE / ANSI · LS NO
ANSI/IEEE normally-open limit switch symbol
IEEE-oriented graphical reference for normally-open limit switch, with public vendor evidence and drawing-reading notes.
IEEE / ANSI · Autodesk IEEE-oriented Limit Switches functional form
Autodesk explicitly publishes this block under IEEE Symbol Preview. The counterpart is the matching functional concept; no equivalence of every detailed standard graphic is asserted.
Shown as an independently authored educational illustration. Use the cited publication and drawing legend to verify the required drafting form.
Schematic · LS NO
What it represents
The NO limit-switch form links a discrete contact to mechanical position or travel. Its electrical state is only interpretable after the drawing identifies the actuated equipment position and the switch's reference condition.
This is a convention-specific lookup based on the publisher's IEEE-labelled preview. The geometry here is independently drawn to explain the connection or operation; it is not a certified reproduction of the standard graphic.
How to read it
- Locate the mechanism position that closes the contact.
- Read the selected library and the project legend together. A vendor block identifier is meaningful within its named library and is not a universal standard-symbol code.
Information to show or reference
- Name monitored position
- Identify switch terminals
- Reference actuator detail
A distinction that matters
A limit switch senses equipment movement; a manually operated pushbutton supplies an operator command.
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 — Limit Switches
Exact public IEEE-oriented category page verifying the component name and vendor block identifier.
IEEE/ANSI 315-1975: graphic symbols for electrical and electronics diagrams
Graphic-symbol standards context and official status; not a source of reproduced artwork.
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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