models available 1551b ionization sensor 2551hr photoelectronic sensor 5551b fixed temperature thermal sensor 2551thr high resolution photo sensor with thermal 5551r rate-of-rise/fixed temperature thermal sensor 500 series intelligent sensors with integral communications ?system sensor 4/97 this document is not intended to be used for installation purposes. a05-228-01 a division of pittway 3825 ohio avenue, st. charles, il 60174 1-800-sensor2 (736-7672), fax 630-377-6495 http://www.systemsensor.com features low standby current shielded electronics noise immunity provides stable communications compact, stylish design sensor plugs easily into base built-in tamper-resist feature sealed against dirt, insects, and back pressure sems screws for easy wiring easy to use decade address switches built-in type id system sensor intelligent sensors offer features and performance that surpass conventional sensors. the sensitivity of models 1551b, 2551hr, and 2551thr can be ?et?individually in the panel software. the sensors may be continuously monitored for changes in sensitivity and compensate for dirt, temperature, or humidity to maintain the set sensitivity. model 5551r offers a rate-of-rise temperature response while the 5551b offers a fixed temperature response. specifications ?2551hr, 2551thr dimensions height: 3.2 (8.1 cm), detector in base (add .5 [1.27 cm] for thermal) diameter: 4.0 (10.2 cm) installed in b501 base 6.1 (15.5 cm) installed in b501b base shipping weight: 9.6 ounces (272 g) temperature range 2551hr: 32 to 120 f (0 to 49 c) 2551thr: 32 to 100 f (0 to 38 c) humidity range: 10% to 93% rh noncondensing air velocity rating: 3,000 fpm operating voltage: 15?2 vdc peak, 6.5 ma current for visible leds latched on standby current: 230 a sensor (2551hr): photoelectronic (scattering principle) thermal sensor (2551thr): 135 f fixed temperature alarm smoke detector spacing: on smooth ceilings (as defined in nfpa 72) spacing of 30 feet (900 sq. ft.) may be used as a guide. see nfpa 72 for more details on spacing requirements. approved msfm
page 2 a05-228-01 1551b with 6 base 2551thr with 4 base 1551b the 1551b intelligent ionization smoke sensor s unique unipolar chamber responds quickly and uniformly to the broadest range of fires and can withstand wind gusts up to 1500 feet-per-minute without outputting an alarm level signal. because of the unipolar chamber, the 1551b is more responsive than most ionization sensors. this makes it a more stable detector. specifications ?1551b dimensions height: 2.3 (5.8 cm), detector in base diameter: 4.0 (10.2 cm) installed in b501 base 6.1 (15.5 cm) installed in b501b base shipping weight: 9.5 ounces (269 g) temperature range: 32 to 120 f (0 to 49 c) humidity range: 10% to 93% rh noncondensing air velocity rating: 1,500 fpm operating voltage: 15?2 vdc peak, 6.5 ma current for visible leds latched on standby current: 200 a sensor: unipolar, dual chamber smoke detector spacing: on smooth ceilings (as defined in nfpa 72) spacing of 30 feet (900 sq. ft.) may be used as a guide. see nfpa 72 for more details on spacing requirements. 2551hr/2551thr the 2551hr intelligent photoelectronic sensor represents the state of the art in smoke sensor technology. it features fully coated circuit boards, special insect and dirt protection and superior rf/transient protection. the sensor will transmit an analog value representative of the sensitivity that can be used by the system to determine when maintenance is required. signal processing for alarm verification can be built into the system to provide immunity to false alarms. the 2551thr intelligent photoelectronic sensor adds a thermal heat collector that will alarm at a fixed temperature of 135 f. general description all 500 series sensors are simple to install, service, and maintain. using a specially designed tool (xr5), maintenance personnel can easily remove and replace the plug-in detectors without using a ladder. 500 series sensors incorporate built-in identification allowing the system to identify the type of sensor. they also have a built-in magnetic reed switch for local testing, and the 1551b, 2551hr, and 2551thr can be sensitivity tested with the mod400r field sensitivity test tool.
page 3 a05-228-01 5551r with 6 base 5551b/5551r the 5551b intelligent thermal sensor s unique dual thermistor sensor will alarm at a fixed temperature of 135 f. the 5551r intelligent thermal sensor will alarm at 135 f and at an increase in excess of 15 per minute. this enables the heat detector to communicate an alarm to the central control panel prior to reaching the static set point, providing a timely response to rapid temperature increases. specifications ?5551b, 5551r dimensions height: 2.1 (5.3 cm) detector in base diameter: 4.0 (10.2 cm) installed in b501 base 6.1 (15.5 cm) installed in b501b base shipping weight: 0.3 lbs. (150 g) temperature range: 32 to 100 f (0 to 38 c) humidity range: 10% to 93% rh noncondensing sensitivity 5551b: 135 f fixed temperature alarm 5551r: 135 f fixed temperature or 15 rise per minute operating voltage: 15?2 vdc peak, 6.5 ma current for visible leds latched on standby current: 200 a sensor: electronic, dual thermistors thermal sensor spacing: ul listed to 50 ft. spacing. other spacing may be used depending on ceiling height and other conditions. see nfpa 72 for more details on spacing requirements. 3 2 1 3 2 1 3 2 1 + - - + u.l. listed compatible control panel class a optional wiring remote annunciator +- caution: do not loop wire under terminal 1 or 2. break wire run to provide supervision of connections. 500 series base wiring diagram
page 4 a05-228-01 500 series junction box selection guide* single 3 1 / 2 4 4 50 60 70 75 gang oct. oct. sq. mm mm mm mm b501 yes nononoyesyesyesno b501b yes yes yes yes no no no no b524rb n o ye s ye s ye s n o ye s ye s ye s b524bi n o ye s ye s ye s n o n o ye s ye s b501bh no no no yes no no no no * box depth contingent on base and wire size. refer to national electrical code or applicable local codes for appropriate recom mendations. ordering information p art no. description ul ulc 1551b 1551ab intelligent ionization sensor, plug-in head 2551hr 2551ahr intelligent photoelectronic sensor, plug-in head 2551thr 2551tahr intelligent high resolution photoelectronic sensor with thermal, plug-in head 5551b 5551ab intelligent thermal sensor, fixed temperature (135 f), plug-in head 5551r 5551ra intelligent 135 f fixed temperature/rate- of-rise thermal sensor, plug-in head b501b b501b flanged mounting base, 6.1 (15.5 cm) b501 b501 flangeless mounting base, 4 (10.2 cm) b524rb b524rba intelligent relay base, flanged b524bi b524bia intelligent isolator base, flanged b501bh b501bha sounder base (includes b501 base) m500mb M500MAB monitor module, interfaces with mechanical contact devices m500ch m500cha control module, controls devices requiring external power m500x m500x isolator module, isolates groups of devices between two isolator modules in the event of a short circuit across communication line m501m m501ma mini-monitor module dh500 dh500a intelligent duct housing dh500acdc dh500acdca intelligent duct housing with auxiliary contacts ra400z ra400za remote annunciator a ccessories mod400r field sensitivity test tool smb600 surface mounting kit for flanged base (b501b) smk400 surface mounting kit for flangeless base (b501) rmk400 recessed mounting kit for flangeless base (b501) smb500 surface mount box for 500 series modules xr5 detector head removal tool xp-4 extension poles for xr5 detector removal tool rs14 replacement screen for 1551b rs24 replacement screen for 2551hr rs24t replacement screen for 2551thr crt400 cover removal tool for 1551b dust45 replacement dust cover for 500 series smoke sensors system sensor worldwide manufacturing & distribution in canada: telephone: 905-812-0767 fax: 905-812-0771 in china: telephone: 852-2191-9003 fax: 852-2736-6580 in the far east: telephone: 852-2191-9003 fax: 852-2736-6580 in india: telefax: 91-022-8202564 in italy: telephone: 39-40-9490-111 fax: 39-40-382137 in the united kingdom: telephone: 44-1403-276500 fax: 44-1403-276501
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