Siemens OH921 Intelligent, Addressable Multi-Criteria Fire Detector, Data Sheet

Cerberus PRO and Peripherals Fire Detector OH921 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 self monitored for sensitivity within UL limits Listed approved as a heat detector Rate of Rise Detection 15 min 8.3 min Fixed 135 57 Superior electromagnetic interference EMI radio frequency interference RFI Field programmable as rate of rise or fixed per Alarm Source 2 Standard Model OH921 with 360 view Tri color detector status light emitting diode Fire Detector Compatible with Model 8720 DPU device loop tester Polarity insensitive via SureWire in non isolator mode Functions with Model DB 11 mounting Restriction of Hazardous Substances RoHS Automatic environment compensation UL Listed FM CSFM Approved UL 268 Open Area Smoke Detection UL 268A Duct Direct in Duct use UL 521 Open Area Heat Detection ULC S529 System Smoke Detector ULC S530 Actuated Fire Detection FM 3230 Open Area Smoke Detection FM 3210 Open Area Heat Detection CSFM File 7272 0067 0258 Product Overview Photoelectric Thermal Heat Detector Model OH921 is an intelligent multi criteria detector that incorporates optical and thermal sensors uses signals in a neural network to create an intelligent multi criteria detector encompassing result is a detector that provides enhanced detection to a wide of products of combustion OH921 is UL 268 7th Ed listed and incorporates advanced built in True Class X SLC operation use is optional greatly improves circuit integrity and provides advanced addressable fault finding multi criteria detector also has state of the art microprocessor circuitry with check as well as detector self diagnostics and supervision programs that is on Cerberus PRO Modular FireFinder XLS V and on Model FC FV9 series PRO fire alarm control panels FACPs Model OH921 is a plug in and addressable two wire multi criteria with both photoelectric and thermal sensors whose value is with built in ISOtechnology feature that is compatible with all Siemens intelligent addressable systems Operation OH921 utilizes an infrared light emitting diode IRLED and infrared light photodiode Under normal conditions light transmitted by the LED is away from the photodiode and scattered through the smoke chamber in a pattern smoke chamber is designed to manage light dissipation and extraneous from dust particles or other non smoke airborne contaminants in such a as to maintain stable consistent detector operation When smoke enters the chamber light emitted from the IRLED is scattered by the smoke particles is received by the photodiode OH921 also utilizes a modern accurate and shock resistant thermistor to temperature changes signal processing with detection algorithms the detector to first gather smoke and thermal and then analyze this information in the neural network By comparing data with the common characteristics of fires or signatures Model OH921 can compare these to those of deceptive phenomena that cause detectors to trigger a false alarm Fire Detector Model OH921 detector provides three 3 pre programmed parameter sets can be selected by the FACP OH921 Infrastructure Building Products Sheet 9900 usa siemens com fire Labyrinth Optical transmitter Optical receiver Heat sensor Dust cover Multi criteria detector Each detector consists of a photoelectric chamber solid state non mechanical thermal and microprocessor based with a low profile plastic Model OH921 fire detector is with a protective dust cover Model OH921 Overview OH921 provides two 2 different alarm sources that can be selected individually ON or OFF by the control panel Source 1 Neural Network Combines smoke heat with the following field selectable profiles Standard This parameter set which is practically ideal for normal office hotel lobby type applications is the default This parameter set additional offers improved resistance to false alarms in areas where misleading sources and helps reduce cooking nuisance alarms UL 268 7th Ed Listed When using this detector direct in air duct applications be sure the detector is set to the parameter Source 2 Thermistor Heat only provides the following fixed at 135 57 default setting detection at 15 min 8.3 min the detector is not programmed Model OH921 will default to a profile setting which allows operation for a office type environment Model OH921 contains a tri color LED indicator capable of flashing any one 1 of 3 distinct colors GREEN YELLOW RED During each flash interval the microprocessor based detector monitors following fire system conditions in its sensing chamber sensitivity is within the range indicated on the nameplate label sensors and electronics on the results of the monitoring the LED indicator flashes the following INTERVAL COLOR seconds supervisory operation sensitivity is within rated limits is in trouble and needs replacement FLASH denotes LED can be turned OFF condition is not powered follow the corresponding description of the panel used quick visual inspection is sufficient to indicate the condition of the detector at any If more detailed information is required a printed report can be provided from the Cerberus PRO Modular Model FC9 series FireFinder XLS V FACPs that the status and settings assigned to each individual detector Infrastructure Building Products Installation Model OH921 detectors use a surface mounting base Model DB 11 or Model DB 11E which mounts on a 10.2 cm octagonal square or single gang electrical box The base utilizes screw clamp contacts for connections and self wiping contacts for increased reliability Model DB 11 detector base can be used with the optional Siemens Model LK 11 detector locking kit which contains 50 detector head DB 11 has aesthetically conducive plugs to cover the outer mounting screw holes OH921 may be installed on the same initiating circuit with the following when used with Cerberus PRO Modular FC9 series FireFinder XLS V FACPs XTRI Series interface modules HFPT 11 detection devices HTRI series interface modules output control modules HMS XMS series manual stations conventional zone module detector is shipped with a protective dust cover consists of the following prevent unauthorized Data of Built in ISOtechnology for True Class X SLC performance Dust resistant photoelectric chamber Solid State non mechanical thermal sensor Microprocessor based electronics with a low profile plastic housing a addressable multi criteria detectors Model OH921 detectors are approved for operation within the UL specified temperature range of 32 to 100 0 Application Data of Model OH921 circuit many retrofit cases existing wiring may be used T tapping is permitted only for Style 4 Class B wiring OH921 is polarity insensitive which can greatly reduce installation and debugging times When operating in NFPA Class X applications SLC polarity must be maintai