Telefire
ADR-3000 – System Introduction
Revision 1.10 4 November 2004
3 Initiating Devices
3.1 Introduction
All Telefire’s analog addressable detectors can be connected to the system using a two-
wire connection.
Each detector contains its addressing circuit. The address is stored in the detector’s
memory and can be programmed or verified by using the PROG-4000 programmer.
Each detector is equipped with an indicating LED that has 360° visibility. This LED
flickers during normal operation and latches on during alarm. Each detector has an
output for an external indicating lamp. The sensitivity of any detector in the system may
be individually configured in two alarm settings (day- and night-sensitivity), and a pre-
alarm setting.
Contamination is a by-product of normal operation and may be caused by various
sources, most of which are impossible to eliminate. Accumulation of dust and dirt over
time may affect a detector’s performance. The system continuously compensates for
these contamination effects using a drift compensation algorithm up to the point in which
the sensor requires cleaning. The control panel will indicate that maintenance is
required by issuing a maintenance alarm message.
3.2 Analog Addressable Detectors and Initiating Devices
TFO-440A
Analog Addressable Photoelectric Smoke Detector
TPH-442A
Analog Addressable Multisensor Photoelectric Smoke / Heat Detector
TFI-330A
Analog Addressable Ionization Smoke Detector
TFH-220A
Analog Addressable Heat Detector (fixed and rate-of-rise)
TFB-110A
Common Base for Analog Addressable Detectors
TFL-1NA
Auxiliary Indicator for Analog Detectors
TPB-800ASR
Analog Addressable Indoor Manual Fire Alarm Call Point (Red)
TPB-800ASY
Analog Addressable Indoor Manual Extinguishing Call Point (Yellow)
3.2.1 TFO-440A Analog Addressable Photoelectric Smoke Detector
Telefire’s TFO-440A is an advanced analog addressable photoelectric smoke detector
that offers the following advantages:
•
It is considered “green” (environment friendly), as it does not contain radioactive
materials.
•
The TFO-440A contains a powerful microprocessor that performs initial signal
processing locally. The final processing and decision making is performed by the
control panel.
•
The TFO-440A’s microprocessor offers a high level of noise immunity and
performs drift compensation in order to overcome environmental changes and
dust accumulation in the chamber. If it is unable to compensate, the control
panel will display a trouble signal requesting cleaning. The microprocessor also
performs signal processing, enables accurate control of the photoelectric
chamber according to parameters set at the control panel, and manages the
communication process with the control panel.
•
The TFO-440A detector excels in sensing smoldering smoke and smoke from
burning of various materials.
The detector consists of a vented chamber (labyrinth), an infrared transmitter and a
receiver that detects light scattering from the smoke particles in the chamber.
The detector’s sensitivity can be adjusted from the control panel within the range of 0.8%
– 2.0%/foot (obscuration) in 0.2% increments.
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