Description
2WT-B System Sensor Photo Detector, 2-Wire, 12/24 Vdc, Photo Thermal.
The 2WT-B System Sensor is a 2-wire, photoelectric i3 smoke and heat detector. System Sensor i3 series smoke detectors represent a significant advancement in conventional detection. The i3 family is founded on three principles: Installation ease, intelligence, and instant inspection.
The i3 line redefines installation ease with its plug-in design. This allows an installer to pre-wire bases (included with heads). The large wire entry port and in-line terminals provide ample room for neatly routing the wiring inside the base. The base accommodates a variety of back box mounting methods as well as direct mounting with drywall anchors. To complete the installation, i3 heads plug into the base with a simple Stop-Drop ‘N Lock action.
i3 detectors offer a number of intelligent features to simplify testing and maintenance. Drift compensation and smoothing algorithms are standard with the i3 line to minimize nuisance alarms. 2-wire i3 detectors can generate a remote LED indicated maintenance signal when connected to the 2W-MOD2 loop test/maintenance module or a panel equipped with the i3 protocol. The SENS-RDR, a wireless device, displays the sensitivity of i3 detectors in terms of percent-per-foot obscuration.
The i3 series provides wide-angle red and green LED indicators for instant inspection of the detector’s condition: normal standby, out-of-sensitivity, alarm, or freeze trouble. When connected to the 2W-MOD2 loop test/maintenance module or a panel with the i3 protocol, the EZ Walk loop test feature is available on 2-wire i3 detectors. This feature verifies the initiating loop wiring by providing LED status indication at each detector.
Technical Specifications:
- Detection: Photoelectric.
- Wiring: 2-wire.
- Heat Sensor: 135F (57.2C) fixed.
- Operating Voltage: 12/24 V non-polarized nominal, 8.5 min. to 35 max.
- Maximum Ripple Voltage: 30% of nominal (peak to peak).
- Alarm Current: 130mA max., limited by a panel.
- Standby Current: 50 A max. avg., 100 A peak.
- Operating Temperature Range: 32 to 100F (0 to 37.8C).
- Operating Humidity Range: 0% to 95% RH, noncondensing.
- Freeze Trouble: 41F (5C).
- Sensitivity: 2.5%/ft. nominal.
- Wiring Gauge: 14-22 AWG.
- Dimensions: 2.0″ (51mm) H x 5.3″ (127mm) Dia.
- Weight: 6.3 oz. (178 g).
Datasheet 2WT-B.
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