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

HAN1S

IEEE / ANSI

ANSI/IEEE Audible siren form

This reference locates audible siren in Autodesk's IEEE-oriented miscellaneous family. A siren indication identifies an audible alarm output with the documented operating role. The public library uses HAN1S 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: Siren. Autodesk IEEE Symbol Preview: Miscellaneous, block HAN1S. Matching functional counterpart linked separately. Independently drawn educational geometry; not a certified IEEE glyph or database identifier.

A distinction that matters

The symbol alone does not prescribe tone pattern or evacuation meaning.

Full reference

HAN1S

IEC

Audible siren

A siren indication identifies an audible alarm output with the documented operating role.

Drawing use: Schematic
Application: Control circuits
Reference family: IEC / Manufacturer
Form evidence: Audible siren. Autodesk IEC-60617 Symbol Preview — Audible indication and protective component forms; vendor family reference, not certified IEC geometry or database identifier.

A distinction that matters

The symbol alone does not prescribe tone pattern or evacuation meaning.

Full reference

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