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

HA2S1_REF

Symbols

Standalone source cross-reference

A source cross-reference identifies the originating side of a diagram continuation relationship. This is a navigation and association element linking a circuit or signal to its continuation. Its source role is meaningful only when the matching destination reference is present.

Drawing use: Schematic
Application: Connections & wiring
Reference family: Manufacturer

A distinction that matters

Rectangle, hexagon and ellipse presentation styles are kept as one source-reference concept.

Full reference

Terminal

Symbols

Terminal connection

A terminal representation identifies a connection point for conductors. The terminal number and strip or assembly identifier link the schematic to physical wiring documentation. A wire number and terminal number identify different things and should not be substituted for one another.

Drawing use: Schematic
Application: Connections & wiring
Reference family: IEC / IEEE / ANSI

A distinction that matters

An electrical junction and a physical terminal are different concepts. A connection dot alone does not necessarily identify a terminal block.

Full reference

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