Features
Modular TrueAlarm sensor base with built-in
electronic alarm sounder:
- Piezoelectric sounder provides high output (88 dBA) with low current requirements (20 mA)
- For use with interchangeable TrueAlarm sensors; photoelectric, heat, or ionization (ordered separately)
Sounder operation can be:
- Powered from 24 VDC or from a compatible Notification Appliance Circuit (NAC)
- Synchronized via communications** or by the NAC, if NAC powered
- Manually activated from the control panel
TrueAlarm analog sensing operation:
- Analog sensor information is digitally communicated to the control panel via MAPNET II ® or IDNet™, two-wire communications †
- Sensor information is processed by the control panel to determine sensor status
For use with Simplex ® control panels model
4010, 4020, 4100, 4100U, 4120, and Universal
Transponders
Functional and architecturally styled enclosure
for ceiling or wall mounting:
- Sound louvers exit both front and side for high output sound
- Smoke sensor louver design directs air flow to chamber, enhancing smoke capture
- Built-in magnetic test feature
Optional accessories:
- Remote alarm LED indicator on single gang plate
- Alarm LED tracking relay
UL listing status:
- Sensor and sounder operation is listed to UL Standard 268
- Sounder operation is also listed to UL Standard 464 as an audible notification appliance
TrueAlarm Analog Sensing Description
Sounder bases combine an audible notification appliance
and a TrueAlarm analog sensor to provide:
Digital Communication of Analog Sensing.
Sensors provide an analog measurement that is digitally
communicated to the control panel where it is analyzed
and an average value is determined and stored. An alarm
or other abnormal condition is determined by comparing
the sensor’s present value against its average value.
Intelligent Data Evaluation. Monitoring each sensor’s
average value provides a software filtering averaging
process that compensates for environmental factors (dust,
dirt, etc.) and component aging, providing an accurate
reference for evaluating new activity. The result is a
significant reduction in the probability of false or
nuisance alarms caused by shifts in sensitivity, either up or down.
Control Panel Selection. Peak activity per sensor is
stored to assist in evaluating specific locations. The alarm
set point for each TrueAlarm sensor is determined at the
control panel, selectable as more or less sensitive as the
individual application requires.
Timed/Multi-Stage Selection. Alarm set points can be
programmed for timed automatic sensitivity selection
(such as more sensitive at night, less sensitive during
day). Control panel programming can also provide
multi-stage operation per sensor. For example, a 0.2%
level may cause a warning to prompt investigation while a
2.5% level may initiate an alarm.
Sensor Alarm and Trouble LED Indication. Each
sensor base’s LED pulses to indicate communications
with the panel. If the control panel determines that a
sensor is in alarm, or that it is dirty or has some other type
of trouble, the details are annunciated at the control panel
and that sensor base’s LED will be turned on steadily.
During a system alarm, the control panel will control the
LEDs such that an LED indicating a trouble will return to
pulsing to help identify the alarmed sensors.
Additional Sounder Base Features
Base mounted address selection allows the address
to remain with its programmed location when the sensor
is removed for service or type change. Access is from the
front under the removable sensor.
Automatic sensor type identification provides
default sensitivity when substituting sensor types.
Different sensor types can be easily interchanged to meet
specific location requirements. This feature also allows
intentional sensor substitution during building
construction. When conditions are temporarily dusty,
instead of covering the smoke sensors (causing them to be
disabled), heat sensors may be installed without
reprogramming the control panel.
Integral red LED indicates power-on by pulsing, or
alarm or trouble when steady on. The exact status is
annunciated at the fire alarm control panel.
Fire alarm control panel operation features include:
- Individual sensitivity selection for each sensor
- Sensitivity monitoring that satisfies NFPA 72 ® sensitivity testing requirements
- Peak value logging allowing accurate analysis for sensitivity selection
- Automatic, once per minute individual sensor calibration check verifies sensor integrity
- Automatic environmental compensation
- Display of sensitivity directly in percent per foot
- Multi-stage alarm operation
- Ability to display and print detailed sensor information in plain English language
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