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Smoke Detectors with Sounder and Relay Option
System Sensor i3TM sounder and relay smoke detectors apply the guiding principles of installation ease, intelligence, and instant inspection in a series of specialty conventional devices.
Installation ease. Throughout the i3 series, installation is simple with its installer-friendly base and plug-in design. The base accommodates a broad range of back box and direct mounting options and provides ample space for pre-wiring the device. To complete the installation, the i3 detector plugs into its base with a simple Stop Drop 'N Lock action. Intelligence. To reduce the likelihood of nuisance alarms, all i3 detectors are equipped with both drift compensation and smoothing algorithms. These capabilities minimize both short- and long-term causes of nuisance alarms such as RF interference and dust accumulation. When connected to the 2W-MOD2 loop test/ maintenance module or an i3 ReadyTM panel, 2-wire i3 detectors can generate a remote maintenance signal when in a maintenance or freeze trouble condition. To measure the sensitivity of any i3 detector, the SENS-RDR displays the reading, in terms of percent-per-foot obscuration, within seconds. Instant inspection. The i3 line's red and green LEDs simplify local status indication during power-up, standby, alarm, maintenance and freeze trouble conditions. When in alarm, i3 sounder models generate an 85 dB temporal tone. If connected to the RRS-MOD reversing relay/synchronization module, all i3 sounders on the loop will activate when one detector is in alarm. Additionally, the RRS-MOD synchronizes the output of all i3 sounders to ensure a clear audible signal. Should the application call for differentiating between a local and a general alarm, the i3 line offers an isolated thermal model, which initiates a local alarm when smoke is detected, and a general alarm when the thermal sensor is activated.
Features
* 85 dB sounder * Form C relay * Isolated thermal sensor * Plug-in design - base included * In-line terminals * Flexible mounting options * Stop-Drop 'N LockTM attachment to the base * Removable cover and chamber * Remote maintenance signaling * Drift compensation and smoothing algorithms * Simplified sensitivity measurement * Dual color LEDs
Agency Listings
S911
3015195
7272-1653:164
372-02-E
2133
Smoke Detector Specifications
Electrical Specifications Operating Voltage LED Modes Nominal: 12/24 V non-polarized 2-wire: 8.5 V - 35 V 4-wire: 10 V - 35 V 30% of applied voltage (peak to peak) 2-wire: 50 A maximum average 4-wire: 50 A maximum average 2-wire: 100 A 4-wire: n/a 2-wire: 2WTR-B: 130 mA limited by control panel 2WTA-B: 130 mA** 4-wire: 4WTA-B, 4WTR-B: 35 mA 4WTAR-B, 4WITAR-B: 50 mA **Direct Power (Non-reverse Polarity): 130 mA limited by panel. Reverse Polarity Power: 30 mA for the 2WTA-B in alarm; 12 mA for all other 2WTA-B units on the loop. Add 25 mA for the RRS-MOD reversing relay alarm current. 2-wire: n/a 4-wire: 0.5 A @ 30V AC/DC 2A @ 30V AC/DC 32F-100 F (0C-37.8 C) 0 to 95% RH non-condensing 135 F (57.2 C) fixed 41 F (5 C) 2.5%/ft. nominal 14-22 AWG 5.3 inches (134 mm) diameter, 2.0 inches (51 mm) height 7.1 oz. (200 grams) 85 dBA (models 2WTA-B, 4WTA-B, 4WTAR-B, and 4WITAR-B only) 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 Red LED Condition Blink every 10 Initial LED seconds status indication Normal Blink every 5 off (standby) seconds Out of off Blink every 5 sensitivity seconds Freeze off Blink every 10 trouble seconds Alarm off Solid Power Up Sequence for LED Indication Condition Duration Initial LED 80 seconds status indication Architect/Engineer Specifications LED Mode Power up Green LED Blink every 10 seconds Duration 80 seconds
Maximum Ripple Voltage Standby Current Peak Standby Current Maximum Alarm Current
Alarm Contact Ratings Form C Contact Ratings Physical Specifications Operating Temperature Range Operating Humidity Range Thermal Sensor Freeze Trouble Sensitivity Input Terminals Dimensions (including base) Approximate Weight Sound Pressure Output Mounting
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 combination photoelectric/thermal equipped with a sounder (model 2WTA-B, 4WTA-B), a Form C relay (model 2WTR-B), a combination sounder/relay (model 4WTAR-B) or an isolated thermal/sounder/relay (model 4WITAR-B). 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% 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 which blinks to indicate power-up, normal standby, out of sensitivity, alarm, and freeze trouble 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. When used in conjunction with the RRS-MOD module, all i3 sounder models on a loop shall sound when one alarms, all shall be synchronized, and all sounders may be silenced from the panel.
Ordering Information
Model 2WTA-B 2WTR-B 4WTA-B 4WTR-B 4WTAR-B 4WITAR-B Thermal Yes Yes Yes Yes Yes Yes Wiring 2-wire 2-wire 4-wire 4-wire 4-wire 4-wire Alarm Current 130 mA max. limited by control panel 130 mA max. limited by control panel 35 mA 35 mA 50 mA 50 mA Model RRS-MOD 2W-MOD2 SENS-RDR RT A77-AB2 Description Reversing relay/synchronization module 2-wire loop test/maintenance module Sensitivity reader Removal/replacement tool Retrofit adapter bracket
3825 Ohio Avenue * St. Charles, IL 60174 Phone: 800-SENSOR2 * Fax: 630-377-6495
(c)2006 System Sensor. Product specifications subject to change without notice. Visit systemsensor.com for current product information, including the latest version of this data sheet. A05-0348-003 * 7/06 * #1676

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