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(►3 Smoke Detector Specifications Architectural/Engineering Specifications Smoke detector shall be a System Sensor i3 Series model number listed to Underwriters Laboratories UL 268 for Fire Protection Signaling Systems.The detector shall be a photoelectric type(Model 2W-B,4W-B)or a combination photoelectric/thermal(Model 2WT-B,4WT-B)with thermal sensor rated at 135°F (57.2°C).The detector shall include a mounting base for mounting to 31/2-inch and 4-inch octagonal,single-gang,and 4-inch square back boxes with a plaster ring,or direct mount to the ceiling using drywall anchors.Wiring connections shall be made by means of SEMS screws.The detector shall allow pre-wiring of the base and the head shall be a plug-in type.The detector shall have a nominal sensitivity of 2.5 percent-per-foot nominal as measured in the UL smoke box.The detector shall be capable of automatically adjusting its sensitivity by means of drift compensation and smoothing algorithms.The detector shall provide dual- color LED indication that blinks to indicate power up,normal standby,out of sensitivity,alarm,and freeze trouble(Model 2WT-B,4WT-B)conditions.When used in conjunction with the 2W-MOD2 module,2-wire models shall include a maintenance signal to indicate the need for maintenance at the alarm control panel and shall provide a loop testing capability to verify the circuit without testing each detector individually. Electrical Specifications Operating Voltage Nominal: 12/24 V non-polarized Minimum: 8.5 V Maximum:35 V Maximum Ripple Voltage 30%peak to peak of applied voltage Standby Current 2-wire:50 pA maximum average;4-wire:50 pA maximum average Maximum Alarm Current 2-wire:130 mA limited by control panel;4-wire:20 mA @12 V,23 mA @ 24V Peak Standby Current 2-wire:100 pA;4-wire:n/a Alarm Contact Ratings 2-wire:n/a;4-wire:0.5 A @ 30V AC/DC Physical Specifications Dimensions(including base) 5.3 inches(127 mm)diameter;2.0 inches(51 mm)height Weight 6.3 oz(178 g) Operating Temperature Range 2W-B and 4W-B:32°F to 120°F(0°C to 49°C);2WT-B and 4WT-B:32°F to 100°F(0°C to 37.8°C) Operating Humidity Range 0 to 95%RH non-condensing Thermal Sensor 135°F(57.2°C)fixed Freeze Trouble 2WT-B and 4WT-B only:41°F(5°C) Sensitivity 2.5%/ft nominal Input Terminals 14 to 22 AWG Mounting 31/2-inch octagonal back box 4-inch octagonal back box Single-gang back box 4-inch square back box with a plaster ring Direct mount to ceiling LED Modes Power-Up Sequence for LED Indication LED Mode Green LED Red LED Condition Duration Power up Blink every 10 seconds Blink every 10 seconds Initial LED status indication 80 seconds Normal(standby) Blink every 5 seconds off Out of sensitivity off Blink every 5 seconds Freeze trouble off Blink every 10 seconds Alarm off Solid Ordering Information Model Thermal Wiring Alarm Current 2W-B No 2-wire 130 mA max.limited by control panel 2WT-B Yes 2-wire 130 mA max.limited by control panel 4W-B No 4-wire 20 mA @ 12 V,23 mA @ 24 V 4WT-B Yes 4-wire 20mA@12V,23mA@24V Accessories 2W-MOD2 2-wire loop test/maintenance module RT Removal/replacement tool SENS-RDR Sensitivity reader A77-AB2 Retrofit adapter bracket,6.6 inch(16.76 cm)diameter .SYSTEM 02009 System Sensor. �Y 3825 Ohio Avenue•St.Charles,IL 60174 Product specifications whject to change without notice.M.t systemsensormm for SENSOR Phone:800-SENSOR2•Fax:630-377-6495 current product information,induding the latest version of this data sheet A05-0318-007.6/09.82169