# Switchroom emergency-stop distribution interface Canonical URL: https://eloragrid.ai/symbols/switchroom-emergency-stop-distribution-interface Publisher: Elora Grid Updated: 2026-11-03 Lookup label: SEDI Drawing use: Schematic Reference families: Manufacturer Representation: Functional block Installation focus: switchrooms Input: Emergency-stop system output Output: Defined shutdown destinations Shows the assigned electrical interfaces controlled by the room emergency-stop system. ## In plain English ### What this block does Shows the assigned electrical interfaces controlled by the room emergency-stop 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 “Emergency-stop system output” at the input and “Defined shutdown destinations” at the output. An emergency stop is not complete room isolation. ### What the drawings help you do Start at the named input: Emergency-stop system output. Identify its source device or document and the state represented on the drawing. Follow the named output: Defined shutdown destinations. Cross-reference its destination and separate the command from confirmation that the equipment responded. ### Terms - Input: Emergency-stop system output - Output: Defined shutdown destinations - Application reference: An explanation of a named drawing function or circuit relationship; the project documents define the equipment and its connections. Concept diagram: Emergency-stop system output → SEDI → Defined shutdown destinations 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 Shows the assigned electrical interfaces controlled by the room emergency-stop 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 “Emergency-stop system output” at the input and “Defined shutdown destinations” at the output. An emergency stop is not complete room isolation. 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: Emergency-stop system output. Identify its source device or document and the state represented on the drawing. - Follow the named output: Defined shutdown destinations. Cross-reference its destination and separate the command from confirmation that the equipment responded. - An emergency stop is not complete room isolation. - 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 emergency-stop system output. - Identify the destination and defined state of defined shutdown destinations. - Record the equipment or control-document revision supporting this functional block. - Check this application limit in the project design: An emergency stop is not complete room isolation. ## Important distinction An emergency stop is not complete room isolation. 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: Emergency-stop system output - Output / connection: Defined shutdown destinations - Lookup label: SEDI 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.