description the fci model SPB-24 projected beam smoke detector is a line type of device designed to detect black, gray or white smoke over large, elongated areas. the system consists of an emitter and receiver. the emitter projects a near infrared pulsed beam to a receiver which may be located from 10 up to l00 meters (32.8 to 328 feet) from the emitter. spacing be - tween units can be as much as 45 feet on centers. the length of protected path and ability to distinguish be - tween blockage and smoke from fires make the spb well suited for use in atriums, gymnasiums, theaters, museums, factories, tunnels, churches, cathedrals, anechoic chambers and high air velocity areas. the detector has three field adjustable sensitivity settings for obscurations of 25%, 50% and 70%. these settings are dependent upon the monitoring distance and ceiling height. should the smoke from a fire cause a decrease in the signal strength of a magnitude that exceeds the programmed obscuration setting, an alarm signal is generated. an inter- ruption of 90% of the beam within a short period of time will create a trouble condition. thus the unit can readily distin- guish between a high smoke level and a sudden blockage or emitter failure. explosive atmospheres may also be protected by locating the transmitter and receiver heads facing each other from be- hind windows outside the explosive areas. the beam can be projected up to 30 meters (100 feet) in such applications. outputs from the receiver are form ?a? alarm contacts and form ?b? trouble contacts. this detector may be used with any ul listed 24 vdc control panel having the proper cur - rent capacity. the receiver contains a microprocessor which automati - cally makes periodic adjustments to the system to compen - sate for normal ambient changes that cause contamination of the lenses and for aging components. since such a change with time appears as a slow change in the beam signal, the microcomputer compensates in such a manner that the signal moves closer to the reference data at a rate of approximately 1% per hour. when this compensating capability reaches a limit, the microprocessor automatically generates a trouble signal. approvals u.l. (std 268) s1383 factory mutual 1y0a5.ay SPB-24 projected beam smoke detector specifications are provided for information only, are not intended to be used for installation purposes, and are believed to be accurate. however, no responsibility is assumed by gamewell-fci for their use. specifications subject to change without notice. ? 2006 all rights reserved. 9020-0382 rev. e 1 of 2 features use with any fci or other u.l. listed control operation unaffected by air velocity three field adjustable sensitivity settings: 25%, 50% and 70% form ?a? alarm contacts form ?b? trouble contacts four-wire configuration low supervisory current calibrated filters available to verify sensitivity gamewell-fci 12 clintonville road, northford, ct 06472 - tel: (203) 484-7161 - fax: (203) 484-7118 www.gamewell-fci.com
alignment due to the wide angle of the beam, alignment is usu- ally uncomplicated. the spb detector employs signal strength indicating leds. alignment is facilitated by turning an alignment adjustment wheel and monitoring the relative signal strength based upon which led is lit. mounting the spb may be wall mounted on a single gang electrical box. 2of2 9020-0382 rev. e t2 t1 f2 f2 f1 f1 0v 0v 24v 24v e2 e1 7 amm-2 monitor module 54 5 90 6 8 3 2 1 9 8 7 6 4 0 1 2 3 red blk yel vio e2 e1 blue yellow orange white gray red power supervisory relay (contacts shown with relay energized) 0v(-) +24 v +12 v relay energized led emitter receiver resettable, 24 vdc power signaling line circuit terminals end-of-line resistor 47k, o.5w to next device typical wiring diagram technical information rated voltage 24 vdc operating voltage range 15 - 33 vdc (42 v peak) current supervisory 250 ua (average) alarm .020 a operating temperature 14 o fto122 o f (non-condensing) dimensions 3.4" w x 4.0" d x 5.7" h ordering information part number model description 112-90006 SPB-24 complete system includes emitter and receiver 112-90007 test filter set fire control instruments
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