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

RDBNB

Symbols

Room DC branch naming boundary

Links each monitored control-power branch to its destination panel and circuit designation. A room DC interface connects station battery distribution, alarm contacts and operating circuits. DC supplies may remain energized when the room's normal AC supply is unavailable, so their source and distribution boundaries must be shown separately.

Drawing use: Schematic
Application: Installation & communications
Reference family: Manufacturer

A distinction that matters

Labels must agree across room and panel drawings. This reference describes the named application; it does not establish a new IEC graphical symbol, an ANSI device-function number or an exact manufacturer connection diagram.

Full reference

CHG

Symbols

Battery charger controller

A battery charger controller manages the charging process for the selected battery system.

Drawing use: Schematic
Application: Microgrid systems
Reference family: Manufacturer

A distinction that matters

A charger controller is not the battery cells or necessarily the complete power converter.

Full reference

Follow the full entry for source drawings and the appropriate standard or selected product. Equipment previews show a manufacturer drawing where available, otherwise a 3D thumbnail.