Q021211
Mechanical interlock between devices
A mechanical interlock indication links devices whose movements are constrained by a physical relationship.
IEC
IEEE / ANSI · Q021211
ANSI/IEEE Mechanical interlock between devices form
IEEE-library form of mechanical interlock between devices: a mechanical interlock indication links devices whose movements are constrained by a physical relationship.
In plain English
What does ANSI/IEEE Mechanical interlock between devices form mean?
This reference locates mechanical interlock between devices in Autodesk's IEEE-oriented mechanical controls family. A mechanical interlock indication links devices whose movements are constrained by a physical relationship. A physical interlock constrains the movements of two associated mechanisms. It remains a mechanical relationship even when the electrical circuit also contains permissive contacts. The public library uses Q021211 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
Use both device tags and the intended exclusive positions to make the relationship readable. Draw any electrical feedback or auxiliary interlock contact separately, since it represents another interface. Identify both devices and the prohibited simultaneous condition. Mechanical interlocking differs from an electrical interlock contact or software permissive. 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 interlock between devices: a mechanical interlock indication links devices whose movements are constrained by a physical relationship. Mechanical interlocking differs from an electrical interlock contact or software permissive.
- Normally open / normally closed
- The contact state in the normal condition defined for the drawing.
- Signal
- Electrical information passed between devices, rather than necessarily the main power supply.
- Rating
- A value stating the conditions for which equipment is specified.
Read the source: Autodesk IEEE Symbol Preview: Mechanical Controls
IEEE / ANSI · Interlock Between Two Devices
Autodesk IEEE Symbol Preview: Mechanical Controls, block Q021211. 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 · Q021211
What it represents
This reference locates mechanical interlock between devices in Autodesk's IEEE-oriented mechanical controls family. A mechanical interlock indication links devices whose movements are constrained by a physical relationship. A physical interlock constrains the movements of two associated mechanisms. It remains a mechanical relationship even when the electrical circuit also contains permissive contacts. The public library uses Q021211 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.
Use both device tags and the intended exclusive positions to make the relationship readable. Draw any electrical feedback or auxiliary interlock contact separately, since it represents another interface. Identify both devices and the prohibited simultaneous condition. Mechanical interlocking differs from an electrical interlock contact or software permissive. 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
- Identify both devices and the prohibited simultaneous condition.
- Mechanical interlocking differs from an electrical interlock contact or software permissive.
Information to show or reference
- Identify the associated device, circuit or diagram boundary.
- Identify both devices and the prohibited simultaneous condition.
- Cross-reference the equipment data, terminal mapping or operating-state legend needed to interpret the form.
A distinction that matters
Mechanical interlocking differs from an electrical interlock contact or software permissive.
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 Q021211 as Interlock Between Two Devices. 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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