System Sensor 2551 and 2551T Plug-in Intelligent - Manual

D500-04-00 1 I56-292-05
2551 and 2551T Plug-in Intelligent
Photoelectronic Sensors with
Communications
INSTALLATION AND MAINTENANCE INSTRUCTIONS
A Division of Pittway
3825 Ohio Avenue, St. Charles, Illinois 60174
1-800-SENSOR2, FAX: 630-377-6495
Before Installing
Please thoroughly read the system wiring and installation
manual, which provides detailed information on sensor
spacing, placement, zoning, and special applications. Cop-
ies of these manuals are available from System Sensor.
NOTICE: This manual should be left with the owner/user
of this equipment.
IMPORTANT: These detectors must be tested and main-
tained regularly following NFPA 72 requirements. These
detectors should be cleaned at least once a year.
General Description
The model 2551/2551T photoelectronic sensors utilize a
state-of-the-art, optical sensing chamber. These sensors are
designed to provide open area protection, and to be used
with compatible control panels only. Connect detectors
only to compatible control units. (For installation in
Canada, refer to CAN/ULC-S524-M86, Standard for the In-
stallation of Fire Alarm Systems and CEC Part 1, Sec. 32.)
Two LEDs on each sensor light to provide a local 360
°
vis-
ibility of the sensor indication. The LEDs can be latched
ON by code command from the panel for an alarm indica-
tion. The LEDs can also be unlatched to the normal condi-
tion by code command. Remote LED annunciator
capability is available as an optional accessory (part no.
RA400Z).
Specifications
Diameter:
6.1 inches (15.5 cm) installed in B501B
4.0 inches (10.2 cm) installed in B501
Height: 3.2 inches (8.1 cm)
Add 0.5 inches (1.3 cm) for thermal models
Weight: 9.6 ounces (272 g)
Installation Temperature Range
2551: 32
°
to 120
°
F (0
°
to 49
°
C)
2551T: 32
°
to 100
°
F (0
°
to 38
°
C)
Installation Humidity Range: 10% to 93% Relative Humidity
Mounting: B501B flanged base
B501 flangeless base
B501 with RMK400 recessed mounting kit
Maximum Air Velocity: 3000 Ft./Min. (15 m/S)
Voltage Range: 15 to 32 Volts DC Peak
Standby Current: 230
µ
A @ 24 VDC
LED Current: 6.5 mA @ 24 VDC
The 2551T adds a thermal heat collector that will alarm at a
fixed temperature of 135
°
F.
Wiring Guide
Refer to the installation instructions for the particular plug-
in base being used: 1) for the B501B base (D550-01-01); 2)
for the B501 base (D550-02-00); 3) for the RMK400 used
with the B501 base (D450-07-00). Bases are provided with
screw terminals for power, ground, and remote annunciator
connections (see Figure 1).
NOTE: All wiring must conform to applicable local codes,
ordinances, and regulations.
NOTE: Verify that all sensor bases are installed and that
the wiring polarity is correct at each base.
WARNING
Remove power from the loop before installing sensors.
1. Install sensors:
a. Verify that the sensor type matches the type written
on the label on the base.
b. Set the sensor to a desired address and then write the
address on the label on the base.
c. Place the sensor into the sensor base.