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Siemens Data Sheet 9904

Smart Infrastructure – Building Products usa.siemens.com/fire

Cerberus® PRO

Detectors and Peripherals

Multi-Criteria Fire Detector [with ASAtechnology™]

Model OOH941

Multi-Criteria Fire Detector

[with ASAtechnology]

Product Overview

Model OOH941 is an advanced, flexible multi

criteria fire detector that incorporates

a redundant optical / thermal sensor. Additionally, Model OOH941 utilizes

ASA

technology™ a distinctive forward / backward, light-

scattering technology that

provides

high-tech, unparalleled fire detection to the widest range of fire types

allowing the detector to distinguish non

-threatening deceptive phenomena.

Each Model

OOH941 is UL 268 7th edition listed incorporating advanced built-in

ISO

technology™ - True Class-

X SLC operation (use is optional) greatly improving

system reliability and circuit integrity while providing advanced addressable fault

finding.

The unit may be

programmed as a high-sensitivity detector, with a 0.2 %/ft Pre-

Alarm threshold and 1.0 %/ft Alarm threshold thus meeting the requirements of

NFPA 76

Standard for the Fire Protection of Telecommunications Facilities

as a

Very Early Warning Fire Detector (VEWFD)

Each of these multi

purpose, addressable detectors offers a full and modern

solution to meet the detection needs for commercial facilities. Model OOH941

detectors can be field programmed for simultaneous and

/ or independent

functionality, depending upon the precise customer and application requirements.

For example, the detector can simultaneously utilize the optical and heat sensors for

enhanced multi

-criteria fire detection, as well as provide independent

outputs for

heat detection. Any combination of the sensors is possible.

The detector is very versatile, and meets the following fire

-industry standards:

• Multi-criteria fire detector ( UL 268 7

edition)

• Heat detector ( UL 521) with five (5) possible field-selectable

temperatures; combined with four (4) rate-of-rise options

• Direct, in-duct (plenum) detector ( UL 268A)

• Supervisory monitoring for temperature ranges

• NFPA 76 (Telco Standard) as VEWFD

• Low-temperature warning signal at 40°F (4.4°C)

─ for sprinkler systems, per NFPA 25 / NFPA 72

For instance, the signals from the detector’s

sensors are monitored and processed via the

ASA

–patented algorithm technology, which

combines the signals into a neural network to

create an intelligent, mul

ti-criteria addressable

detector.

Architect & Engineer Specifications

 UL 268 7

edition Listed, ULC Listed; FM

(#3230, #3210), CSFM (#7272-0067:0258)

Approved

 Built-in ISOtechnology™

 Advanced multi-criteria fire detector that

has dual-optical thermal sensors

 Differentiates between deceptiv

henomena and an actual fire (nuisance-

alarm avoidance)

 Compatible with `H’-series devices on the

same loop of Cerberus PRO modular

(FACPs)

 Provides enhanced detection via

forward-and-backward light-

scattering technology

 Complies with NFPA 76 (Telco standard) as

`VEWFD’ high-sensitivity detector

 UL Listed and FM Approved as a multi-

criteria and `VEWFD’ fire detector

 UL 268A Listed for direct air-duct use

(4,000 FPM)

 Supervisory temperature-monitoring

 Remote sensitivity-measurement capability

 Automatic environment compensation

 Up to 22 application profiles

 Tri-color detector-status light-emitting

diode (LED)

 Polarity insensitive via SureW ire™

 Low-temperature warning for sprinkler

systems, per NFPA 25

 Meets UL, NFPA 72 requirements fo

ensitivity self-monitoring

 Compatible with:

- Model DB-11

—series mounting bases

- Model 8720 / DPU (devic

rogrammer / loop tester)

 Restriction of Hazardous

Substances (RoHS compliant)

 Responds to both flaming and

smoldering-fire signatures

Summary of content (6 pages)

PAGE 1
Cerberus® PRO Detectors and Peripherals Multi-Criteria Fire Detector [with ASAtechnology™] Model OOH941 Architect & Engineer Specifications  UL 268 7th edition Listed, ULC Listed; FM (#3230, #3210), CSFM (#7272-0067:0258) Approved  Built-in ISOtechnology™  Advanced multi-criteria fire detector that has dual-optical thermal sensors  Differentiates between deceptive phenomena and an actual fire (nuisancealarm avoidance)  Compatible with `H’-series devices on the same loop of Cerberus PRO modular (FACP
PAGE 2
1. Heat sensors 4. Forward scatterer 2. Receiver 3. Backward scatterer 5. Labyrinth Model OOH941 Forward-and-Backward Light-Scattering Technology Product Overview – (continued) The encompassing result is an intelligent detector that provides enhanced detection capability to a wide range of products of combustion – while offering unsurpassed rejection to nuisance-alarm sources, including: dust | steam | cooking aerosols and other deceptive phenomena that could cause false alarms.
PAGE 3
Operation – (continued) Field-Device Programmer / Test Unit Every Model OOH941 intelligent detection device is compatible with the Siemens field-device programmer / test unit (Model DPU | 8720), which is a compact, portable, 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.
PAGE 4
Operation – (continued) Based on the results of the monitoring, the LED indicator flashes the following:  FLASH INTERVAL FLASH COLOR CONDITION GREEN: Normal supervisory operation. Smoke sensitivity is within rated limits. 10 YELLOW: Detector is in trouble and needs replacement. 4 RED: Alarm condition 1 NO FLASH: Detector is not powered. – [in seconds] denotes LED can be turned OFF Please follow the corresponding description of the panel used.
PAGE 5
Technical Data OPERATING TEMPERATURE: +32° HEAT DETECTOR RANGE: +135° +120°F – (0° – +49°C) – +175°F (+57° – +79°C) PROGRAMMABLE - 4° – +120°F SUPERVISORY (-20° – +49°C) TEMPERATURE (available with compatible FACPs) WARNING: DETECTOR SENSITIVITY RANGE: AIR VELOCITY: Open Area: Direct-in-duct: UL Listed: 0.88 to 3.35 % / ft. NFPA 76 (Telco) VEWFD: 0.2 % / ft. Pre-alarm 1.0 % / ft.
PAGE 6
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.