Interlogix 741UT Specsheet
Conventional Initiating Devices
Two- and Four-Wire
Head & Terminal
Base
Smoke Detectors
700 Series
Overview
The FireworX 700 Series conventional photoelectric smoke detector is an interchangeable head and base detector with a lightscattering optical sensor that provides outstanding stability and
excellent response to a wide range of fires.
A pulsed infrared LED light source and a high-speed photodiode
sensing element are housed in an omnidirectional sensing chamber protected by an insect screen. For easy cleaning, the detector
features a field-replaceable optical chamber.
Model 721UT and 741UT photoelectric detectors include integral
fixed temperature and rate-of-rise heat detectors. Also available is
the 713-5U electronic heat detector head for areas too dusty for
smoke detection.
FireworX 700 Series smoke detectors were the industry’s first
conventional self-diagnostic detectors specifically designed for
the demands of commercial and industrial environments. If the
detector drifts out of its UL Listed sensitivity range or fails internal
diagnostics, the alarm LED flashes once a second to indicate
a trouble condition. This meets NFPA 72 field sensitivity testing
requirements without the need for external meters.
Additional diagnostic information is activated by applying a magnet
near the detector’s integral reed switch. This initiates a self-diag nostic
routine and provides visual indication of sensitivity level, or if service
is required. The magnet test causes the LED to blink. The number of
blink counts corresponds to a smoke detector sensitivity range.
And, if they become dirty over time, the 700 Series detectors
automatically adjust the alarm threshold through built-in drift compensation. If the detector ever does need to be cleaned, the patented field replaceable optical chamber makes cleaning a snap.
Standard Features
• Self-diagnostic capabililty continually monitors operation
• Meets NFPA 72 sensitivity test requirements
• Head and terminal base design (base sold separately)
• Automatic drift compensation
• Field-replaceable optical chamber
• Low-profile design blends into the ceiling
• Advanced alarm verification nuisance alarm immunity
• Continuity switch in base to ease installation
• Extensive two-wire compatibility listings
Engineering Specifications
The FireworX 700 Series photoelectric smoke detector, is a lowprofile, self-diagnostic, two-wire or four-wire detector that monitors its own sensitivity and operational status. The detector meets
NFPA 72 field sensitivity testing requirements without the need for
external meters. Built-in drift compensation automatically adjust the
sensitivity if the detector gets dirty. The 700 Series features an alarm
verification feature to further reduce the chance of a nuisance alarm.
Normal sensing occurs every 9 seconds. This rate doubles when a
signal exceeding the alarm threshold value is sensed. Two additional
successive signals above the threshold level initiate an alarm. The
patented optical sensing chamber is field replaceable, allowing
quick and easy cleaning and maintenance.
A manually operated switch between terminals 1 and 2 establishes
continuity across the alarm initiating circuit at initial installation of
the base simplifying testing without the smoke head in place. The
switch automatically opens when a detector head is plugged in.
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interlogix.com
North America
T 885-286-8889
Technical Specifications
Electrical
Voltage 8.5 — 33VDC, non polarity sensitive
Maximum ripple (peak to peak) 10% (Vp - p)
Typical standby current (24V) 70μA
Typical alarm current (24V) up to 60 mA max, if not limited by control panel
Relay contacts 2A @ 30VDC, 1A @ 120 VAC
Photoelectric Sensitivity 2.85%, + 0.37, – 1.00%
Operating temperature 32°F to 120°F (0°C to 49°C)
Operating humidity range 0 to 95% Non-condensing
RFI immunity 20 V/m min; 0-1000 MHz
Remote LED output current 5 mA min, 8.5 mA max
Drift compensation adjustment 1.0%/ft. max
Environmental
Heat Sensor Ratings
(721UT, 741UT, 713-5U)
Maximum wind velocity 300 ft/min or
Field wiring size 12-18 AWG
Remote test input (721UT) 100 ohm max
Reset voltage 2.5V max
Reset time 1 second max
UL two-wire compatibility
identifier
Physical
Color White head and base
Detector head dimensions 4” D x 1.75” H (10 cm x 4.44 cm)
Base dimensions 701U, 702U: 6” D x .06” H (15.24 cm x 1.3 cm)
Total height, (head and base) 1.98” (5 cm) H
Regulations
Listing UL 268, FM, CSFM, MEA approved
Fixed 135°F/ Rate of rise 15°F/min., >105°F (8.3°C/min.,
>40.6°C)
S10A (711U, 721UT, 713-5U)
S11A (731U)
Asia
T 852-2907-8108
F 852-2142-5063
Australia
T 61-3-9239-1200
F 61-3-9239-1299
Europe
T 32-2-725-11-20
F 32-2-721-40-47
Latin America
T 561-998-6100
F 561-994-6572
interlogix.com
Specifications subject to change without notice.
© 2012 Interlogix.
All rights reserved.
Ordering Information
711U Smoke detector head only, photoelectric, two-wire
721UT Smoke detector head only, photoelectric, two-wire
w/integral heat, output for remote LED
731U Smoke detector head only, photoelectric, two-wire,
use 702RU base for aux. relay functionality
741U Smoke detector head only, photoelectric, four-wire
701U Smoke detector base, 3 terminals, 6” dia.
702U Smoke detector base, 6 terminals, 6” dia.
702RU Smoke detector base, 6 terminals, aux. relay, 6” dia.
Compatibility
Heads Bases
711U 701U, 702E, 702U
731U 702RU
741U 702U
713-5U 701U
Note: Bases sold separately
05-31-12
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