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 Ready™ 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.i3has red and green LEDs to 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. The RRS-MOD also synchronizes i3 sounder output 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.
|What's in the box||(1) System Sensor 2-Wire Photoelectric Smoke Detector with sounder-2WTA-B|
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Nominal: 12/24 V non-polarized
2-wire: 8.5 V to 35 V
4-wire: 10 V to 35 V
Maximum Ripple Voltage
30% of applied voltage (peak to peak)
2-wire: 50 μA maximum average
4-wire: 50 μA maximum average
Peak Standby Current
2-wire: 100 μA
Maximum Alarm Current
2-wire: 2WTA-B: 130 mA limited by control panel
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.
Alarm Contact Ratings
Operating Temperature Range
32°F to 100°F (0°C to 37.8°C)
Operating Humidity Range
0 to 95% RH non-condensing
135°F (57.2°C) fixed
base) 5.3 inches (134 mm) diameter, 2.0 inches
(51 mm) height
7.1 oz (200 g)
Sound Pressure Output
85 dBA (model 2WTA-B)
3½-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