# Fire-system equipment shutdown request

Canonical URL: https://eloragrid.ai/symbols/fire-system-equipment-shutdown-request
Publisher: Elora Grid
Updated: 2026-11-03
Lookup label: FESR
Drawing use: Schematic
Reference families: Manufacturer

Representation: Functional block
Installation focus: switchrooms
Input: Fire shutdown output
Output: Assigned equipment stop request

Identifies the separately defined shutdown output from the fire cause-and-effect system.

## In plain English

### What this block does

Identifies the separately defined shutdown output from the fire cause-and-effect system.

### A simple example

In a switchroom, the fire panel may report detection, system faults and a separately documented shutdown request to the station controller. These signals have different meanings and must not be combined into one unexplained alarm. For this reference, the drawing identifies “Fire shutdown output” at the input and “Assigned equipment stop request” at the output. The exact equipment scope must be stated.

### What the drawings help you do

Start at the named input: Fire shutdown output. Identify its source device or document and the state represented on the drawing. Follow the named output: Assigned equipment stop request. Cross-reference its destination and separate the command from confirmation that the equipment responded.

### Terms

- Input: Fire shutdown output
- Output: Assigned equipment stop request
- Application reference: An explanation of a named drawing function or circuit relationship; the project documents define the equipment and its connections.

Concept diagram: Fire shutdown output → FESR → Assigned equipment stop request
A reading guide. The entry's original illustration and input/output facts describe this application.

- [Indoor substation: lighting, fire and auxiliary services](https://www.electrical-installation.org/enwiki/Indoor_substation)


## What it represents

Identifies the separately defined shutdown output from the fire cause-and-effect system. A fire-system interface passes defined indications and control requests between the fire installation and electrical equipment. The receiving circuit must identify the exact purpose of the signal and the equipment it affects.
In a switchroom, the fire panel may report detection, system faults and a separately documented shutdown request to the station controller. These signals have different meanings and must not be combined into one unexplained alarm. For this reference, the drawing identifies “Fire shutdown output” at the input and “Assigned equipment stop request” at the output. The exact equipment scope must be stated.
Use the coordinated fire cause-and-effect schedule to define each response. Original interface blocks describe signal roles without specifying suppression operation, evacuation behavior or life-safety performance. 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: Fire shutdown output. Identify its source device or document and the state represented on the drawing.
- Follow the named output: Assigned equipment stop request. Cross-reference its destination and separate the command from confirmation that the equipment responded.
- The exact equipment scope must be stated.
- Use the coordinated fire cause-and-effect schedule to define each response. Original interface blocks describe signal roles without specifying suppression operation, evacuation behavior or life-safety performance.

## Information to show or reference

- Label the source and connection reference for fire shutdown output.
- Identify the destination and defined state of assigned equipment stop request.
- Record the equipment or control-document revision supporting this functional block.
- Check this application limit in the project design: The exact equipment scope must be stated.

## Important distinction

The exact equipment scope must be stated. 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: Fire shutdown output
- Output / connection: Assigned equipment stop request
- Lookup label: FESR is a library lookup label, not a standard device designation.

## Public references

- [Indoor substation: lighting, fire and auxiliary services](https://www.electrical-installation.org/enwiki/Indoor_substation) — Schneider Electric. Public technical context for switchroom fire and emergency interfaces. Lighting, emergency lighting, fire provisions and substation auxiliary services. Original cause-and-effect examples require project design. 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.