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ESL Sentrol 521NXBT 2-Wire Smoke With ROR Heat
Product Scope
ESL smoke
detectors are photoelectric and range in applications from 12/24V AC/DC hardwire for
residential or to battery operated wireless transmission to 120VAC direct wire products.
Model types are as varied as necessary to meet virtually every application need- whether
it be residential, commercial or industrial.
Electronic Heat
Detectors are available in four styles featuring either 135oF or 194oF single circuit
fixed temperature models to 135oF or 194oF 4 single circuit fixed and rate of rise
temperature models.
Manual Fire Alarm
(Pull) Stations: Choices include single action, dual action hex and/or key reset model
options. Units use terminal or pigtail connectors and are UL- CSFM listed. A weatherproof
model is available.
Specifications
Product Data
2-wire Voltage
Dip switch 1 "on" 6.5-33VDC, polarity sensitive
Dip switch 1 "off" 8.5- 33VDC, polarity sensitive
4-wire Voltage 8.5- 33VDC
Maximum ripple (pk to pk) 10% (V p - p )
Typical average standby current (24V) 70µA
Typical alarm current (6/12/24V) 2-wire up to 60mA max (if not limited by control panel)
Typical alarm current (6/12/24V) 4-wire 15mA
Alarm Contacts 500mA @ 36VDC (resistive)
Aux. Relay contacts 1A @ 30VDC (resistive)
Sensitivity (photoelectric) 3.1% + 0.50 -1.00%
Operating temperature 32°F to 100°F (0 to 37°C)
Operating humidity range 0 to 95% Non-condensing
RFI Immunity 20V/m minimum; 0-1000MHz
Field wiring size 12-24 AWG (16-22 recommended)
Heat detector specifications
Rate of rise 15°F/min and >105°F (8.3°C/min, > 40.6°C)
Fixed 135°F (57°C)
UL two-wire compatibility identifier
Dip switch 1 "on" S09A
Dip switch 1 "off" S10A, S11A
Drift compensation adjustment 1.0%/ft. max
Reset time 1 second minimum
Detector head dimensions
Diameter 5" (127mm)
Height 2" (51mm)
Mounting dimensions
Diameter 4.75" (125mm)
Height 0.3" (8mm)
Color White head and base
Listings UL, CSFM, MEA (2-wire only)
Dimensions
UL LISTED
4-wire, photoelectric, 12-24 VDC
4-wire, photoelectric, 12-24 VDC, multi-criteria algorithms, fixed/rate of rise heat
Test magnet in plastic shell for pole mounting
Architectural and
Engineering Specifications
The ESL 500 Series photoelectric smoke
detector is a low-profile, self-diagnostic, two-wire detector that monitors its own
sensitivity and operational status. This detector meets NFPA 72 field sensitivity
requirements without the need for external meters. Built-in drift compensation
automatically adjusts the sensitivity as the detector gets dirty. 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 will initiate an
alarm. See installation instructions for information about correct installation and
maintenance. The proprietary optical sensing chamber is field replaceable, allowing quick
and easy cleaning and maintenance.
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