Side-by-side reference

Understand the difference.

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

First referenceCompare with

Q020402

IEC

Two-way linear-motion qualifier

This qualifier identifies motion or force in both directions along a linear path. Opposite directions of travel belong to one linear movement relationship. Separate contacts or sensors may identify each end of travel or an intermediate position.

Drawing use: Schematic
Application: Control circuits
Reference family: IEC / Manufacturer
Form evidence: Two-way linear-motion qualifier. Autodesk IEC-60617 Symbol Preview — Linear force and motion qualifiers; vendor family reference, not certified IEC geometry or database identifier.

A distinction that matters

Bidirectional motion does not imply simultaneous motion in both directions.

Full reference

Coil

Symbols

Relay coil

A relay coil represents an operating element that changes the state of associated contacts when the device operates. Coil and contact representations are often drawn in different locations to make the circuit easier to read. Their shared identifier and cross-references establish the relationship.

Drawing use: Schematic
Application: Control circuits
Reference family: IEC / IEEE / ANSI

A distinction that matters

A relay coil is not a contactor power pole. Similar operating-element marks can represent equipment with different switching duties.

Full reference

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