Understand the difference.

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

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IEEE / ANSI

ANSI/IEEE on-delay timer relay symbol

The on-delay timer operating form identifies a timing element whose specified output transition is postponed after initiation. Trigger, auxiliary supply and delayed output are distinct circuit information, even when the timer assembly combines them.

Drawing use

Schematic

Application

Control circuits

Reference family

IEEE / ANSI / Manufacturer

Form evidence

Autodesk IEEE-oriented Time Delay Relays 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.

A distinction that matters

An on-delay operating element differs from a delayed contact drawn separately under the same timer tag.

Full referenceAdd to legend

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Symbols

On-delay timer relay

An on-delay timer postpones a specified output transition after its timing condition becomes active. The timing input, auxiliary supply and delayed output must be distinguished in the schematic.

Drawing use

Schematic

Application

Control circuits

Reference family

IEC / Manufacturer

A distinction that matters

On-delay postpones the specified transition on operation; off-delay postpones a transition after removal of the initiating condition.

Full referenceAdd to legend

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