Features
TrueAlarm analog sensing provides the following features
- Digital transmission of analog sensor values using IDNet or MAPNET II two-wire communications
For use with the following Simplex products
- 4007ES, 4010, 4010ES, 4100ES, and 4100U Series control units and 4008 Series control units with reduced feature set (refer to data sheet S4008-0001 for details)
- 4020, 4100, and 4120 Series control units, Universal Transponders, and 2120 TrueAlarm CDTs equipped for MAPNET II operation
Photoelectric smoke sensors provide the following features
- Sensitivity levels from 0.2% to 3.1%. See TrueAlarm sensors for more information.
General features
- Ceiling or wall mounting
- Listed to UL 268 7th Edition and ULC-S529
- NEMA 1 rated. See TrueAlarm analog sensing product selection chart for more information.
- Louvered smoke sensor design enhances smoke capture by directing flow to chamber; entrance areas are minimally visible when ceiling mounted
- Designed for EMI compatibility
- Magnetic testing
- Different bases support a supervised or unsupervised output relay, or a remote LED alarm indicator
Additional base reference
- For isolator bases, refer to data sheet S4098-0025
- For sounder bases, refer to data sheet S4098-0028
- For photo/heat sensors, refer to data sheet S4098-0024 , single address and S4098-0033 , dual address
Digital communication of analog sensing
TrueAlarm analog sensors provide an analog measurement digitally
communicated to the host control panel using Simplex addressable
communications. The control unit analyses the data, determines an average value and stores it. Comparing the sensor's present value
against its average value and time, determines an alarm or other
abnormal condition.
Intelligent data evaluation
Monitoring each sensor's average value provides a continuously
shifting reference point. A software filtering process compensates for
environmental factors, such as dust and dirt, and component aging, to
provide an accurate reference for evaluating new activity. This filtering
reduces the probability of false or nuisance alarms caused by shifts in
sensitivity, either up or down.
Control unit selection
The control unit stores peak activity for each sensor to assist in
evaluating specific locations. The host control unit determines the alarm
set point for each TrueAlarm sensor, selectable as more or less sensitive
as the individual application requires.
Timed/multi-stage selection
You can program the sensor alarm set points for timed automatic
sensitivity selection, such as more sensitive at night, less sensitive during
day. You can program the control unit to provide multi-stage operation
for each sensor.
Sensor alarm and trouble LED indication
Each sensor base's LED pulses to indicate communications with the unit.
If the control unit determines a sensor is in alarm, is dirty, or has some
other type of trouble, the details are annunciated at the control unit and
the sensor's base LED will turn on steadily. During a system alarm, the
control unit will control the LEDs such that an LED indicating a trouble
will return to pulsing to help identify the alarmed sensors.
TrueAlarm sensors
- Sealed against rear air flow entry
- Interchangeable mounting
- EMI/RFI shielded electronics
Smoke sensors
- Photoelectric technology sensing
- 360° smoke entry for optimum response
- Built-in insect screens
4098-9714 photoelectric sensor
TrueAlarm photoelectric sensors use a stable, pulsed LED light source
and a silicon photodiode receiver to deliver consistent and accurate
low power smoke sensing. There are three user-selectable sensitivities
for special applications for each individual sensor: 0.2%, 0.5%, and 1%
for each foot. Standard sensitivity is 1.25% to 3.1% for each foot. The
fire alarm control unit runs an algorithm that can vary the sensitivity for
normal applications between 1.25% and 3.1% for each foot.
Note: Fixed sensitivity settings higher than 1.0% for each foot are not
UL268 7th Edition compliant.
The sensor head design provides 360° smoke entry for optimum
response to smoke from any direction. Due to its photoelectric
operation, air velocity is not normally a factor, except for impact on area
smoke flow.
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