# Switchroom DC alarm collection panel

Canonical URL: https://eloragrid.ai/symbols/switchroom-dc-alarm-collection-panel
Publisher: Elora Grid
Updated: 2026-11-03
Lookup label: SDACP
Drawing use: Schematic
Reference families: Manufacturer

Representation: Functional block
Installation focus: switchrooms
Input: Room alarm contacts
Output: Common alarm processing

Collects the assigned DC-operated alarm contacts at the room's supervised alarm interface.

## In plain English

### What this block does

Collects the assigned DC-operated alarm contacts at the room's supervised alarm interface.

### A simple example

In a switchroom, the station battery can continue supplying protection and breaker controls during an AC supply interruption. The alarm system should distinguish charger loss from a low battery condition. For this reference, the drawing identifies “Room alarm contacts” at the input and “Common alarm processing” at the output. Individual alarm causes must remain traceable.

### What the drawings help you do

Start at the named input: Room alarm contacts. Identify its source device or document and the state represented on the drawing. Follow the named output: Common alarm processing. Cross-reference its destination and separate the command from confirmation that the equipment responded.

### Terms

- Input: Room alarm contacts
- Output: Common alarm processing
- Application reference: An explanation of a named drawing function or circuit relationship; the project documents define the equipment and its connections.

Concept diagram: Room alarm contacts → SDACP → Common alarm processing
A reading guide. The entry's original illustration and input/output facts describe this application.

- [MicroGenius S2/S4 battery charger technical manual](https://www.sens-usa.com/hubfs/Controlled%20Files/Manuals/101330_MGS_User_Manual.pdf)


## What it represents

Collects the assigned DC-operated alarm contacts at the room's supervised alarm interface. 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.
In a switchroom, the station battery can continue supplying protection and breaker controls during an AC supply interruption. The alarm system should distinguish charger loss from a low battery condition. For this reference, the drawing identifies “Room alarm contacts” at the input and “Common alarm processing” at the output. Individual alarm causes must remain traceable.
Identify the DC source, returns and monitored branches. Do not infer battery autonomy, conductor polarity, isolation or earthing arrangements from a generic power block. The functional block is an independent explanation of this named application. Equipment-specific ratings, terminal connections and operating conditions must be established in the project documentation.

## How to read it

- Start at the named input: Room alarm contacts. Identify its source device or document and the state represented on the drawing.
- Follow the named output: Common alarm processing. Cross-reference its destination and separate the command from confirmation that the equipment responded.
- Individual alarm causes must remain traceable.
- Identify the DC source, returns and monitored branches. Do not infer battery autonomy, conductor polarity, isolation or earthing arrangements from a generic power block.

## Information to show or reference

- Label the source and connection reference for room alarm contacts.
- Identify the destination and defined state of common alarm processing.
- Record the equipment or control-document revision supporting this functional block.
- Check this application limit in the project design: Individual alarm causes must remain traceable.

## Important distinction

Individual alarm causes must remain traceable. 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.

## Facts

- Representation: Functional block
- Installation focus: Switchrooms
- Input / boundary: Room alarm contacts
- Output / connection: Common alarm processing
- Lookup label: SDACP is a library lookup label, not a standard device designation.

## Public references

- [MicroGenius S2/S4 battery charger technical manual](https://www.sens-usa.com/hubfs/Controlled%20Files/Manuals/101330_MGS_User_Manual.pdf) — SENS. Public technical context for switchroom dc interfaces and alarm collection. Battery charging modes, DC distribution interfaces and charger alarms. The application text and educational graphic are independently authored; the publisher does not certify this representation.

## Graphic scope

Independent original educational concept illustration by Elora Grid. Not a certified standards graphic or manufacturer footprint. Unitless; not to scale. Original artwork licence: https://creativecommons.org/licenses/by/4.0/. Publisher material is linked only.