Understand the difference.

Compare the meaning, drawing context and source references of two entries. A similar graphic or shared abbreviation does not establish equivalence.

Q021211

IEEE / ANSI

ANSI/IEEE Mechanical interlock between devices form

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.

Drawing use

Schematic

Application

Control circuits

Reference family

IEEE / ANSI / Manufacturer

Form evidence

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.

A distinction that matters

Mechanical interlocking differs from an electrical interlock contact or software permissive.

Full referenceAdd to legend

Q021211

IEC

Mechanical interlock between devices

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.

Drawing use

Schematic

Application

Control circuits

Reference family

IEC / Manufacturer

Form evidence

Mechanical interlock between devices. Autodesk IEC-60617 Symbol Preview — Mechanical return and interlock qualifiers; vendor family reference, not certified IEC geometry or database identifier.

A distinction that matters

Mechanical interlocking differs from an electrical interlock contact or software permissive.

Full referenceAdd to legend

Original educational previews. Follow the source references on each full entry for the appropriate standard or selected product.