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Siemens Data Sheet 6150

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Desigo® Fire Safety

Detectors and Peripherals

Multi-Criteria Fire Detector

Model FDOT421

Model FDOT421-

Multi-Criteria Fire Detector

Architect & Engineer Specifications

 UL 268 7th Edition Listed

 Built-in ISOtechnology™

 252 Isolation devices per SLC

 Each detector is self-testing:

- complete

diagnostics performed

every 10 seconds

- self-monitored for sensitivity within

UL Listed limits

 Listed, approved as a heat detector:

- Rate-of-Rise Detection: 15

F / min.

(8.3

C / min.)

- Fixed: 135

F (57



Superior electromagnetic interference

(EMI) and radio-frequency interference

(RFI) immunity

 Field programmable as rate-of-rise or

fixed temperature, per `Alarm Source 2’ |

Standard parameter

 Tri-color detector-status light-emitting

diode (LED) with 360° view

 Compatible with Model DPU (device

programmer / loop tester)



Polarity insensitive via SureWire™

technology (in non-isolator mode)

 Functions with Model DB-11–series

mounting bases



Restriction of Hazardous Substances

(RoHS compliant)

 Automatic environment compensation

 UL L

isted | FM, CSFM Approved

- UL 268: `Open Area Smoke Detection

’

- UL 268A (

Duct) - `Direct

-in-Duct’ use

- UL 521: `Open Area Heat Detection

’

- ULC-S529: `Sys

tem Smoke Detector

’

- ULC-S5

30: `Heat Actuated Fire Detection

’

- FM 3230: `Open

Area Smoke Detection

’

- FM 3210: `O

pen Area Heat Detection

’

- CSFM |

File: 7272-0067:0258

Product Overview

The Photoelectric | Thermal (Heat) Detector (Model FDOT421) is an intelligent,

addressable multi-criteria detector that incorporates optical and thermal sensors, and

uses signals in a neural network to create an intelligent multi-criteria detector. The

encompassing result is a detector that provides enhanced detection to a wide range of

products of combustion.

Model FDOT21 is UL 268 7th Ed. listed and incorporates advanced built-in

ISOtechnology™ - True Class-X SLC operation (use is optional) greatly improves

reliability, circuit integrity and provides advanced addressable fault finding.

The multi-criteria detector additionally has state-of-the-art microprocessor

circuitry (with error check), as well as detector self-diagnostics and supervision

programs that is used on Desigo Fire Safety Modular | FireFinder XLS/V and on

Model FC/FV20-series Desigo Fire Safety fire-alarm control panels (FACPs).

Additionally, Model FDOT421 is a plug-in and addressable two-wire multi-criteria

detector (with both photoelectric and thermal sensors) whose value is increased

with built-in ISOtechnology feature, that is compatible with all current Siemens

intelligent, addressable systems.

Operation

Model FDOT421 utilizes an infrared light emitting diode (IRLED), and infrared

light-sensing photodiode. Under normal conditions, light transmitted by the LED

is directed away from the photodiode and scattered through the smoke chamber

in a controlled pattern.

The smoke chamber is designed to manage light dissipation and extraneous

reflections from dust particles or other non-smoke, airborne contaminants in such

a way as to maintain stable, consistent detector operation. When smoke enters

the detector chamber, light emitted from the IRLED is scattered by the smoke

particles, and is received by the photodiode.

Model FDOT421 also utilizes a modern, accurate and shock-resistant thermistor to

sense temperature changes.

The signal processing with detection algorithms

allows the detector to first gather smoke and thermal

data, and then analyze this information in the

detector’s `neural network.’ By comparing data

received with the common characteristics of fires or

fire signatures, Model FDOT421 can compare these

signals to those of deceptive phenomena that cause

other detectors to trigger a false alarm.

Each Model FDOT421 detector provides three (3) pre-programmed parameter sets

that can be selected by the FACP.

Summary of content (5 pages)

PAGE 1
Desigo® Fire Safety Detectors and Peripherals Multi-Criteria Fire Detector Model FDOT421 Architect & Engineer Specifications Product Overview  UL 268 7th Edition Listed  Built-in ISOtechnology™  252 Isolation devices per SLC  Each detector is self-testing: complete diagnostics performed every 10 seconds self-monitored for sensitivity within UL Listed limits  Listed, approved as a heat detector: Rate-of-Rise Detection: 15°F / min. (8.3°C / min.
PAGE 2
1. Dust cover 2. Multi-criteria detector 1. Labyrinth 2. Optical 1 NOTE: Each detector consists of a dust-resistant photoelectric chamber; a solid state, nonmechanical thermal sensor, and microprocessor-based electronics with a low-profile plastic housing. Every Model FDOT421 fire detector is shipped with a protective dust cover. transmitter 3. Optical receiver 4.
PAGE 3
Installation All Model FDOT421 detectors use a surface-mounting base | Model DB2-HR | DB-11 or Model DB-11E. Each base mounts onto a 4-inch (10.2 cm.) octagonal, square or single-gang electrical box. The base utilizes screw-clamp contacts for electrical connections and self-wiping contacts for increased reliability.
PAGE 4
Field-Device Programmer / Test Unit Model FDOT421 is compatible with the Siemens field-device programmer / test unit (Model DPU), which is a compact, portable and menu-driven accessory for electronically programming and testing these addressable detectors promptly and reliably. For instance, the field technician selects the accessory’s program mode, and enters the desired address. Model DPU eliminates the need for cumbersome, unreliable mechanical programming methods (e.g.
PAGE 5
NOTICE – The information contained in this data-sheet document is intended only as a summary, and is subject to change without notice. The product(s) described here has/have a specific instruction sheet(s) that cover various technical, limitation and liability information. Copies of install-type, instruction sheets – as well as the General Product Warning and Limitations document, which also contains important data, are provided with the product, and are available from the Manufacturer.