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200 Series Intelligent
Low Profile Plug-in
Detectors
Models Available
2251(A)
Photoelectric Smoke Detector
2251T(A)
Photoelectric with Thermal
2251TM(A) Acclimate™ Multicriteria
Smoke Detector
1251(A)
Ionization Smoke Detector
5251P(A)
Fixed Temperature
Thermal Detector
5251RP(A) Rate-of-Rise Thermal Detector
2251T with RMK400
200 Series Bases
B501(A)
B210LP(A)
B501BH(A)
B501BHT(A)
B224RB(A)
B224BI(A)
RMK400
SMK400
SMB600
Flangeless Mounting Base
Flanged Mounting Base
Standard Sounder Base
Temporal Tone Sounder Base
Relay Base
Isolator Base
Recessed Mounting Kit
Flangeless Surface
Mounting Kit
Flanged Surface Mounting Kit
5251P with B501
200 Series Accessories
F110
RA400Z(A)
M02-04-01
M02-09-00
XR-2
XP-4
DUST12
B501B/B524 Retrofit Flange
Remote LED Annunciator
Detector Test Magnet
Telescoping Test Magnet
Detector Removal Tool
Extension for XR-2 (5-15 ft.)
Dust Cover
2251 with B210LP
(A) suffix denotes ULC listed product
Product Overview
Sleek, low-profile design
Analog communications
Low standby current
Rotary address switches
Superior EMI protection
System Sensor 200 Series intelligent plug-in smoke detectors with integral communication provide features that surpass conventional detectors. Detector sensitivity can be programmed in
the control panel software. Sensitivity is continuously monitored and reported to the panel.
Point ID capability allows each detector’s address to be set with decade address switches,
providing exact detector locations for selective maintenance when chamber contamination
reaches an unacceptable level.
Model 2251 photoelectric detector’s unique optical sensing chamber is designed with superior signal to noise ratio. It’s engineered to sense smoke produced by a wide range of combustion sources.
Dual electronic thermistors add 135°F fixed temperature thermal sensing on the 2251T.
Model 2251TM is a photoelectric smoke detector with supplementary 135°F thermal. Also
known as Acclimate™, it uses advanced on-board software to combine the signals from the photo
and thermal elements, creating a true multicriteria detector capable of rejecting nuisance sources,
but still responding quickly to real fires. Acclimate has the capability of adjusting its sensitivity
according to the type of environment that it is installed in.
Model 1251 ionization detector incorporates a unique single source, dual chamber design to
respond quickly and dependably to a broad range of fires.
®
Models 5251P and 5251RP offer 135°F fixed and rate-of-rise thermal detection in a low profile
package. These thermal detectors provide cost effective, intelligent property protection in a variety
of applications.
Specifications
Height
Ion/Photo: 1.66″ (4.2 cm)
UL Listed Velocity Range
Ion: 0 – 500 fpm
Voltage Range
15 – 32 volts DC peak
Thermal: 2.0″ (5.1 cm)
Photo/Photo with Thermal:
0 – 4000 fpm
(suitable for installation in ducts)
Standby Current (max. avg.)
Ion/Thermal: 200 µA @ 24 VDC
(without communication),
300 µA @ 24 VDC (one communication
ever y 5 sec. with LED enabled)
Diameter
4.0″ (10.2 cm)
Relative Humidity
10% – 93% noncondensing
Shipping Weight
3.6 oz. (104 g)
Operating Temperature Range
Ion/Photo: 32° to 120°F (0° to 49°C)
Photo with Thermal: 32° to 100°F
(0° to 38°C)
Thermal Ratings
Fixed Temperature Setpoint:
135°F (57°C)
Rate of Rise Detection:
15°F/min. (9.4°C/min.)
Thermal: –4° to 100°F (–20° to 38°C)
Photo/Photo with Thermal: 250 µA @
24 VDC (without communication),
360 µA @ 24 VDC (one communication
ever y 5 sec. with LED enabled)
LED Current (max.)
6.5 mA @ 24 VDC (on)
Accessories
RA400Z Remote LED
M02-09-00 Test Magnet with Telescoping Handle
System Sensor Sales and Service
System Sensor Headquarters
3825 Ohio Avenue
St. Charles, IL 60174
Ph: 800-SENSOR2
Fx: 630/377-6495
Documents On Demand
1-800-736-7672 x3
www.systemsensor.com
System Sensor Canada
Ph: 905.812.0767
Fx: 905.812.0771
System Sensor in China
Ph: 86.29.524.6253
Fx: 86.29.524.6259
System Sensor– Far East
Ph: 852.2191.9003
Fx: 852.2736.6580
System Sensor UK
Ph: 44.1403.276500
Fx: 44.1403.276501
System Sensor in Singapore
Ph: 65.273.2230
Fx: 65.273.2610
System Sensor– Australia
Ph: 613.54.281.142
Fx: 613.54.281.172
© 2001 System Sensor. The company reserves the right to change product specifications without notice.
A05-1023-001•1/01•#709