951-444-7011

Interlogix 521NBXT Two-Wire Smoke Detector w/ Heat Sensor

Be the first to review this product

The 500N Series self-diagnostic, two & four wire smoke detectors are conventional direct-wire smoke detectors with analog features such as remote maintenance/trouble reporting (CleanMe), drift compensation, and multi-criteria detection.
Brand: Interlogix
Part Number: 521NBXT

Availability: This item requires 1 business days to process.

$28.50

Description

Details

521BXT Smoke Detector, 500N Series, Photo, 2-wire, CleanMe®, 6-24VDC, fixed/rate of rise heat sensor

The 500 Series self-diagnostic, two & four wire smoke detectors are conventional direct-wire smoke detectors with analog features such as remote maintenance/trouble reporting (CleanMe®), drift compensation, and multi-criteria detection. The 500 Series continually monitor their own sensitivity and operational status, and provide a visual and remote trouble condition 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. The 521 has a unique feature enabling it to send a signal (CleanMe) to the 505 module (sold separately) when it has drifted outside of its UL Listed sensitivity range or has failed its internal diagnostics test. The 505 is an interface module that will signal a 24V panel via relays when the 2-wire smokes are dirty. Several 12V and 24V control panels have the CleanMe software built in, eliminating the need for the 505 module. When CleanMe is not desired, simply leave the switch on the two wire devices off and it will work as a normal two wire detector. CleanMe allows the installer time to schedule a service call and avoid a false alarm. Time between cleaning detectors is dramatically increased because of the 500 series 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 the life of the detector. And when the 500 series smoke detectors have told you that cleaning is necessary, it's literally a snap with a patented field replaceable optical chamber (part number 211).

Standard Features

  • CleanMe® remote maintenance reporting reduces false alarms
  • Smart dual fixed/rate of rise heat works with photo chamber to catch fires faster
  • Built-in drift compensation reduces false alarms
  • Field replaceable optical chamber makes servicing a snap
  • Small, low profile design blends in with any environment

Additional Info

Additional Info

Part Number 521NBXT
What's in the box (1) 521NBXT Two-Wire Smoke Detector w/ Heat Sensor

Reviews

Write Your Own Review

You're reviewing: Interlogix 521NBXT Two-Wire Smoke Detector w/ Heat Sensor

Specifications


Specifications


Voltage: For standard 6/12 V operation (6 to 20 VDC), polarity sensitive. For standard 12/24 V operation (8.5 to 33 VDC), polarity sensitive

Maximum ripple (6/12/24 V): 10% (Vp-p)

Typical average standby current: 70 μA

Typical alarm current (6/12/24 V): Up to 60 mA maximum if not limited by control panel

Aux. relay contacts:  1 A at 30 VDC; Form C

Alarm contacts: 500 mA at 36 VDC (resistive)

Photoelectric sensitivity : 2.0% +1.08 −1.02

Operating temperature: 32 to 100°F (0 to 37°C)

Operating humidity: 0 to 95% noncondensing

RFI immunity: 20 V/m minimum; 0 to 1,000 MHz

Color :White head and base

Field wiring size; 12 to 24 AWG (16 to 22 AWG recommended)

Electrical boxes: Fits standard single-gang and 3-1/2 in. and 4 in. round ceiling electrical boxes

Heat detector:
    Rate-of-rise: 15°F/min and >105°F (8.3°C/min and >40.6°C)
    Fixed threshold: 135°F (57.2°C)

UL two-wire compatibility identifiers: S09A, S10A, S11A

Drift compensation adjustment: 1.0%/ft. max.

Detector head dimensions: 5.5 in. (14.0 cm) diameter; 2 in. (5.0 cm) deep

Mounting dimensions: 5.25 in. (13.3 cm) diameter; 0.3 in. (0.8 cm) deep

Reset time: 1 second minimum