Interlogix 521B Specsheet
Product Data Sheet
521B
The 521/541 series self-diagnostic, two/four-wire
smoke detectors are the industry's first
conventional direct-wire smoke detectors with
analog features such as drift compensation and
multi-criteria detection.
The 521/541 series continually monitor their own
sensitivity and operational status, and provide a
visual indication if they drift out of the sensitivity
range or fail internal diagnostics. This meets
NFPA 72 field sensitivity testing requirements
without the need for external meters.
Applying a magnet near the detector’s
integral reed switch activates additional diagnostic
information. This initiates a self-diagnostic routine
and provides visual indication of sensitivity level
or indicates if service is required.
Time between cleaning detectors is dramatically
increased because of the 521/541's built-in drift
compensation. This feature, usually only available
in analog systems, allows the detector to
automatically adjust its sensitivity over time as it
becomes dirty, increasing dust life.
And when the 521/541 indicates that cleaning is
necessary, it's literally a snap with ESL's patented
field replaceable optical chamber.
Standard Features
CleanMe - Remote maintenance reporting reduces
E
false alarms (2-wire only)
Field replaceable optical chamber makes servicing a
E
snap
E
Built-in drift compensation reduces false alarms
E
Plug-in terminal block
Small, low-profile design blends in with any
E
environment
E
Compatible with most fire and security panels
521B
Specifications
Operating voltage
Curent draw
Operating Temperature
Operating humidity
Sounder specifications
Heat detector specifications
Fixed temperatureN/A
Rate-of-riseN/A
Alarm contact
Auxilairy contact
Dimensions (Ø x H)
Ordering Information
Part No. Description
521B
6/24 Vdc 2-wire smoke sensor with CleanMe signal
6.5 - 33 Vdc
0.07 mA standby, 60 mA alarm
0 °C to 37 °C
0 to 95%
N/A
N/A
N/A
120 x 50 mm
As a company of innovation, UTC Fire & Security reserves the right to change product specifications without notice. For the latest
product specifications, visit UTC Fire & Security online or contact your sales representative.
IPS-HQ-521B-2015-05-27 08:04:23
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