®
Division of Pittway Corporation
D500-02-00
1
I56-309-03
Notifier, 12 Clintonville Rd., Northford, CT, 06472 (203) 484-7161
INSTALLATION AND MAINTENANCE INSTRUCTIONS
FOR MODEL SDX-551/SDX-551TH PLUG-IN INTELLIGENT
PHOTOELECTRONIC SENSOR WITH COMMUNICATIONS
Before installing sensors, please thoroughly read the system wiring and installation manual, which provides detailed in-
formation on sensor spacing, placement, zoning, and special applications. Copies of these manuals are available from
Notifier.
GENERAL DESCRIPTION
The model SDX-551/SDX-551TH photoelectronic sensor utilizes a state-of-the-art, optical sensing chamber. This sensor
is designed to provide open area protection, and to be used with compatible UL-listed NOTIFIER control panels only.
Suitable for use with panel Model AM2020, Loop Interface Board, LIB-200; compatibility ID:A; maximum number of sen-
sors per loop is 99. See 155-531, Revision A, for installation and wiring diagrams.
Two LEDs on each sensor light to provide a local 360° visibility of the sensor indication. The LEDs can be latched ON by
code command from the panel for an alarm indication. The LEDs can also be unlatched to the normal condition by code
command. Remote LED annunciator capability is available as an optional accessory (part no. RA400Z).
The SDX-551TH adds a thermal heat collector that alarms at a fixed temperature of 135° F.
SPECIFICATIONS
Diameter:
6.1 inches (15.5 cm) installed in BX-501
4.1 inches (10.4 cm) installed in B501
Height:
2.3 inches (5.8 cm)
Add 0.5 inches (1.3 cm) for thermal models
Weight:
9.6 ounces (272 gm)
Installation Temperature Range
SDX-551:
32° to 120° F (0° to 49° C)
SDX-551TH:
32° to 100° F (0° to 38° C)
Operating Humidity Range:
10% to 93% Relative Humidity
Mounting:
BX-501 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:
150
µ
A @ 24 VDC
LED Current:
6 mA @ 24 VDC
WIRING GUIDE
Refer to the installation instructions for the particular plug-in base being used: 1) for the BX-501 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.
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