SYSTEMSENSOR 2251

Advanced Multi-Criteria
Fire Detector with four
unique sensing elements
This latest addition to the System Sensor 200 Series
combines four complementary technologies into one
device to convey accurate fire sensing information for
locations where absolute certainty is required.
Features
•Unique ability to detect all four major elements of a fire
•Highest nuisance alarm immunity
•Advanced algorithms interpret and respond to the multiple inputs
•Six levels of sensitivity
•CO sensing for fastest response to slow-developing, smoldering
fires
•Fully integrated infrared sensing to support the fire alarm decision
•Automatic drift compensation of smoke sensor and CO cell
•Superior EMI protection
•Twin LED indicators providing 360˚ visibility
•LEDs can be panel controlled to blink, latch on, latch off
•Built-in test switch
3030459
The integration of continual monitoring for all four major elements
of a fire has enabled System Sensor to create a detector that
responds more quickly to an actual fire with the highest immunity to
nuisances. This advanced multi-criteria detector normally operates at
a high immunity level and changes to become very sensitive to fires
as soon as fire characteristics are sensed. In this way, nuisances are
monitored and ignored, reducing false alarms.
The detector’s onboard intelligence runs advanced algorithms that
dynamically adjust detection parameters to respond to the inputs
from the sensors, enabling instant response as ambient conditions
change. The program changes sensor thresholds, sensor gain, time,
delays, combinations, sampling rates and averaging rates. If any
sensor fails, the detector automatically adjusts the sensitivity of the
remaining sensors. It also recognizes a fault condition.
The CO sensing cell has an expected lifetime of approximately six
years. The CO cell is not a field-replaceable component. An internal
timer signals the control panel to indicate the approach of the CO
cell’s end of life. Upon expiration, you should contact the system
supplier to arrange for replacement of the unit. However, detection
is not compromised when the CO cell is expired. The algorithms
automatically adjust to properly weight the inputs from the
photoelectric, heat and IR sensors.
The IR light sensor recognizes specific situations, such as welding,
and makes adjustments rapidly to further reduce the potential for
nuisance alarms. The thermal detection function fuses thermistor
technology with a software-corrected, linear temperature response
to offer exceptional nuisance alarm immunity and excellent fire
detection.
Agency Listings
S911
This plug-in fire detector combines four separate sensing elements
in one unit: 1. photoelectric chamber senses airborne particulate
for smoke detection, 2. electrochemical cell technology monitors
carbon monoxide (CO) produced by smoldering fires, 3. infrared (IR)
sensing measures ambient light levels and flame signatures, and 4.
thermal detection monitors temperature.
7272-1653:208
NOTE: The CO cell is specifically deployed as a component of smoke
detection in this device. This device is not listed for applications in which
standalone CO detection is required for life safety.
2251-COPTIR Specifications
Physical Specifications
4.0 inches
2.4 inches
Height
2.7˝ installed in B210LP base or B501 base
Diameter
6.0˝ installed in B210LP base; 4.0˝ installed in B501 base
Shipping Weight
4.6 oz
Color
Ivory
Material
Bayblend FR110
Operating Humidity Range
10 to 93% relative humidity (non-condensing)
Application Temperature Range
32°F to 100°F (0°C to 38°C)
Electrical Specifications
Operating Voltage Range
15 to 32 VDC
Maximum Standby Current
300 μA at 24 VDC (one communication every 5 seconds with LED blink enabled)
Maximum Alarm Current (LED on)
7mA at 24 VDC
Sensitivity Settings and Suggested Applications
Level 1
1% / ft of smoke
Very clean environments – laboratories
Level 2
2% / ft of smoke
Clean environments – offices
Level 3
3% / ft of smoke
Moderately clean environments – hotel rooms, dorm rooms
Level 4
3% / ft of smoke with different algorithm processing Hotel rooms near a shower, boiler rooms
and weighting of sensor elements
Level 5
4% / ft of smoke
Equipment rooms, kitchens, paint shops
Level 6
Thermal alarm at 135°F (57°C)
*Once the CO cell has reached the end of life and enters Photo, Thermal, Infrared (PTIR) mode, the following sensitivities apply:
Level 1
1% / ft of smoke
Very clean environments – laboratories
Level 2
2% / ft of smoke
Clean environments – offices
Level 5
3% / ft of smoke
Moderately clean environments – hotel rooms, dorm rooms
Level 6
Thermal alarm at 135°F (57°C)
Ordering Information
Part No.
2251-COPTIR
Accessories
Description
Advanced Multi-Criteria Fire Detector
B501(A)*
B210LP(A)
B501BH-2(A)
B501BHT-2(A)
B224RB(A)
B224BI(A)
RA400Z(A)
M02-04-01
M02-09-00
Flangeless Mounting Base
Flanged Mounting Base
Standard Sounder Base
Temporal Tone Sounder Base
Relay Base
Isolator Base
Remote LED Annunciator
Detector Test Magnet
Telescoping Test Magnet
*(A) suffix denotes Canadian Product
3825 Ohio Avenue • St. Charles, IL 60174
Phone: 800-SENSOR2 • Fax: 630-377-6495
©2009 System Sensor.
Product specifications subject to change without notice. Visit systemsensor.com for
current product information, including the latest version of this data sheet.
A05-0428-002 • 2/09 • #2099