2112 Datasheet, PDF (1/4 Pages) Systemsensor advanced ideas. – Photoelectronic Smoke Detectors

INSTALLATION AND MAINTENANCE INSTRUCTIONS
2112/24S and 2112/24TS
Photoelectronic Smoke Detectors
3825 Ohio Avenue, St. Charles, Illinois 60174
1-800-SENSOR2, FAX: [phone]
Specifications
Diameter:
5.5 inches (140 mm)
Height (including mounting bracket): 1.9 inches (48 mm)
Weight:
5.3 oz. (150 g)
Operating Temperature Range
Model 2112/24S:
32° to 120° F (0° to 50° C)
Model 2112/24TS:
32° to 100° F (0° to 38° C)
Operating Humidity Range:
10% to 93% Relative Humidity, Noncondensing
Latching Alarm:
Reset by momentary power interruption
Heat Sensor (2112/24TS only):
135° F Fixed Temperature Electronic Thermistor
Electrical Ratings
System Voltage (nominal):
12 or 24 VDC
Minimum:
8.5 VDC
Maximum:
35 VDC
Maximum Ripple Voltage:
30% of nom. Voltage (peak to peak)
Standby Current:
50 µA maximum
Alarm Current:
17 mA typical, 23 mA max. at 12V
19 mA typical, 25 mA max. at 24V
Reset Voltage:
0.8 VDC minimum
Reset Time:
0.3 seconds maximum
Start-up Time:
30 seconds maximum (after 60 sec. reset)
EOL Relay:
A77-716B, 12/24 Volt
Alarm Initiation Contact Ratings
Resistive or Inductive Load (60% power factor)
Form A:
0.5A @ 30 VAC/DC
Before Installing
Please thoroughly read the System Sensor manual I56-407,
Guide for Proper Use of System Smoke Detectors, which pro-
vides detailed information on detector spacing, placement,
zoning, wiring, and special applications. Copies of this
manual are available at no charge from System Sensor.
Installation of these detectors is simplified by the use of a
mounting bracket and a plug-in screw terminal block that
can be prewired to the system, allowing the detector to be
easily installed or removed for cleaning. The detector’s sen-
sitivity can be tested in place using the MOD400R Test
Module.
NOTICE: This manual shall be left with the owner/user of
this equipment.
IMPORTANT: This detector must be tested and maintained
following NFPA 72 requirements. The detector should be
cleaned at least once a year.
General Description
Model 2112/24S is a 4-wire photoelectronic smoke detector
that uses a state-of-the-art optical sensing chamber. This
detector is designed to provide open area protection. Model
2112/24TS features a restorable, built-in, fixed-temperature
(135° F) thermal detector.
An LED on the detector provides a local visual indication of
the detector’s status. If power is applied to the detector, and
it is functioning normally in standby mode within the listed
sensitivity ranges, the status LED blinks once every ten sec-
onds. The LED also provides a visual indication that main-
tenance is required. If the LED stops blinking, the detector
is either not powered, out of the listed sensitivity range,
and/or unable to function properly. The test switch will not
operate if the detector is below the insensitive limit. The
LED will also latch on when the detector is in alarm.
D200-62-00
1
I56-932-12R