D200-51-00
1
I56-548-06
1251 Plug-in Intelligent Ionization
Sensor 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 read the system wiring and installation manual, I56-
407. This manual includes detailed information on sensor
spacing, placement, zoning, and special applications. Cop-
ies of this manual are available from System Sensor.
General Description
The Model 1251 intelligent ionization sensor uses a state-
of-the-art sensing chamber. This sensor is designed to pro-
vide open area protection and is intended for use with
compatible control panels only.
Two LEDs on each sensor light to provide a local, visible
sensor indication. The LEDs can be latched on by code
command from the control panel for an alarm indication.
The LEDs can also be unlatched to the normal condition by
code command. Remote LED annunciator capability is also
available as an optional accessory (RA400Z).
Specifications
Operating Voltage Range:
15 to 32 VDC
Max. Avg. Standby Current:
300
µ
A
@ 24 VDC (one
communication every 5 sec. with LED blink enabled)
Max. Alarm Current (LED on):
6.5 mA @ 24 VDC
Operating Humidity Range:
10% to 93% Relative Humidity, noncondensing
Operating Temperature Range:
0° to 49°C (32° to 120°F)
Height:
1.7 inches (43 mm) installed in B210LP Base
Diameter:
6.2 inches (155 mm) installed in B210LP Base
4.1 inches (104 mm) installed in B501 Base
Weight:
3.6 oz. (102 g)
Wiring Guide
Refer to the installation instructions for the plug-in base be-
ing used. As indicated in Figure 1, terminals for power,
ground, and the optional RA400Z Remote Annunciator are
included in the base. Base Models B210LP (shown in Figure
1) and B501 are electrically identical.
NOTE:
All wiring must conform to all applicable codes,
ordinances, and regulations.
NOTE:
Verify that all sensor bases are installed and that
polarity of the wiring is correct at each base.
Disconnect loop power before installing sensors.
1. Sensor Installation
a. Set the sensor to the desired address and record that
address on the label attached to the base.
b. Insert the sensor into the base and rotate it clockwise
until it drops into place.
c. Continue to rotate the sensor until it locks into the
base.
Dust covers are an effective way to limit the entry of dust
into smoke detector sensing chambers. However, they may
not completely prevent airborne dust particles from enter-
ing the detector. Therefore, System Sensor recommends the
removal of detectors before beginning construction or other
dust producing activity.
Be sure to remove dust covers from any sensors that were
left in place during construction as part of returning the
system to service.
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