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Reporter Intercoms:
Very affordable prices, EXCELLENT battery life, and reliable wireless operation are some of the admirable features of our new Reporter and Oracle intercom systems.
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Shop > System Sensor > 4WT-B
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System Sensor 4-Wire, Photoelectric i3 Smoke Detector
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This four wire smoke gets wired to any zone, while the two wire (2WT-B) is used for a loop of up to 20 smokes on the zone specific part of the panel.
System Sensor's 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.
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Installation ease. The i3 line redefines installation ease with its plug-in design.
This allows an installer to pre-wire the bases included with the 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-in to the base with a simple Stop-Drop 'N Lock
action.
Intelligence. 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. When connected to the
2W-MOD loop test/maintenance module, or a panel equipped with the i3
protocol, 2-wire i3 detectors are capable of generating a remote maintenance
signal when they are in need of cleaning. This signal is indicated via an LED
located at the module and the panel. To read the sensitivity of i3 detectors, the
SENS-RDR is a wireless device that displays the sensitivity in terms of percent
per foot obscuration.
Instant inspection. The i3 series provides wide angle red and green LED indicators
for instant inspection of the detector condition, indicating: normal standby,
out-of-sensitivity, alarm, or freeze trouble conditions. When connected to the
2W-MOD 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.
Features
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- Plug-in detector line { mounting base included
- Large wire entry port
- In-line terminals with SEMS screws
- Mounts to octagonal and single-gang backboxes, 4-square backboxes, or direct to ceiling
- Stop-Drop 'N Lock™ attachment to base
- Removable detector cover and chamber for easy cleaning
- Built-in remote maintenance signaling
- Drift compensation and smoothing algorithms
- Simplified sensitivity measurement
- Wide angle, dual color LED indication
- Loop testing via EZ Walk feature
- Built-in test switch
Models Available
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- 2WT-B: 2-wire standard with thermal
- 4WT-B: 4-wire standard with thermal
| Electrical Specifications |
| Operating Voltage | Nominal: 12/24V non-polarized
Min.: 8.5V
Max.: 35V |
| Maximum Ripple Voltage | 30% of nominal (peak to peak) |
| Standby Current | 2-wire: 50 &A maximum average
4-wire: 50 &A maximum average |
| Maximum Alarm Current | 2-wire: 130 mA limited by control panel
4-wire: 20 mA @12V, 23mA @ 24V |
| Peak Standby Current | 2-wire: 100 &A
4-wire: n/a |
| Alarm Contact Ratings | 2-wire: n/a
4-wire: 0.5 A @ 30V AC/DC |
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| LED Modes |
| LED Mode | Green LED | Red LED |
| Power up | Blink every 10 seconds | Blink every 10 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 |
| Power Up Sequence for LED Indication |
| Condition | Duration |
| Initial LED status indication | 80 seconds |
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| Physical Specifications |
| Operating Temperature Range | 32°F{100°F (0°C{37.8°C) |
| Operating Humidity Range | 0 to 95% RH non-condensing |
| Thermal Sensor | 135°F (57.2°C) fixed |
| Freeze Trouble | 41°F (5°C) |
| Sensitivity | 2.5%/ft. nominal |
| Input Terminals | 14{22 AWG |
| Dimensions (including base) | 5.3 inches (127 mm) diameter
2.0 inches (51 mm) height |
| Weight | 6.3 oz. (178 grams) |
| Mounting | 312-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 |
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