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

TSW

IEC

Time switch plan mark

A time switch operates a contact according to a daily, weekly or astronomical program. Plans draw a clock face, a circle with hands, combined with a switch stroke or placed in the board, and link it to the controlled circuit such as external lighting or a water heater.

Drawing use: GA
Application: Installation & communications
Reference family: IEC
Form evidence: Time switch. IEC 60617 installation-plan style (architectural and topographical installation symbols); independently drawn, not certified IEC geometry or a database identifier.

A distinction that matters

A time-delay push switch runs for a fixed period after a press; a time switch follows a clock schedule.

Full reference

HIN1P29

IEC

Clock indication

A clock indication identifies a time display or clock function in the circuit documentation.

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

A distinction that matters

A clock display and an elapsed-hours meter measure different time relationships.

Full reference

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