Edwards SIGA-PHS Quick Start Manual
LIFE SAFETY & INCIDENT MANAGEMENT
Intelligent 3D
Multisensor
Detector
SIGA-PHS
EDWARDS Catalog u Intelligent Initiating
Overview
The Signature Series Model SIGA-PHS Intelligent 3D Multisensor
Detector gathers analog information from each of its two fire sensing elements (photoelectric and heat) and converts it into digital
signals. The detector’s on-board microprocessor measures and
analyzes these signals separately with respect to a third element
- Time. We call this technology 3D. It compares the information to
historical readings, time patterns, and several known fire characteristics to make an alarm decision. Digital filters remove signal
patterns that are not typical of fires. Unwanted alarms are virtually
eliminated.
Standard Features
• Integrates photoelectric smoke and 135 º F (57 º C) fixed-temperature heat sensing technologies
• Non-volatile memory
• Automatic device mapping
• Electronic addressing
• Environmental compensation
• Integral microprocessor - intelligent detector
• Wide 0.67% to 3.77%/ft. sensitivity range
• Twenty pre-alarm sensitivity values, set in 5% increments
• Identification of dirty or defective detectors
• Automatic day/night sensitivity adjustment
• Twin RED/GREEN status LEDs
• Standard, relay, fault isolator, and audible mounting bases
• Designed and manufactured to ISO 9001 standards
Note: Some features described here may not be supported by all control
systems. Check your control panel’s Installation and Operation Guide for
details.
MEA
7272-1657:
0126
S853
Signature Series Overview
The microprocessor in each detector provides four additional
benefits - Self-diagnostics and History Log, Automatic Device
Mapping, and Fast, Stable Communication.
Self-diagnostics and History Log - Each Signature Series
detector constantly runs self-checks to provide important maintenance information. The results of the self-check are automatically
updated and permanently stored in the detector’s non-volatile
memory. This information is accessible for review any time at the
control panel, PC, or by using the SIGA-PRO Signature Program/
Service Tool.
Automatic Device Mapping - The loop controller learns where
each device’s serial number address is installed relative to other
devices on the circuit. This mapping feature provides supervision
of each device’s installed location to prevent a detector from being
reinstalled (after cleaning etc.) in a different location from where it
was originally. The history log for the detector remains relevant and
intact regardless of its new location.
The Signature Series Data Entry Program also uses the mapping
feature. With interactive menus and graphic support, the wired circuits between each device can be examined. Layout or “as-built”
drawing information showing wire branches (T-taps), device types
and their address are stored on disk for printing hard copy. This
takes the mystery out of the installation. The preparation of as-built
drawings is fast and efficient.
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Fast Stable Communication - On-board intelligence means less
information needs to be sent between the detector and the loop
controller. Other than regular supervisory polling response, the detector only needs to communicate with the loop controller when it
has something new to report. This provides very fast control panel
response time and allows a lower baud rate (speed) to be used for
communication on the circuit.
Environmental Compensation - Detection sensitivity for the
SIGA-PHS is virtually independent of its installed environment and
its physical condition. Environmental compensation means each
sensing element adapts to long-term changes caused by dirt,
humidity, temperature, aging etc. It even compensates for small
amounts of normal ambient smoke.
Sensitivity Range - The SIGA-PHS has a sensitivity range or
window of 0.67 - 3.70% obscuration per foot. The installer selects
the detector’s ALARM sensitivity level. Five settings ranging from
the least sensitive at 3.5% obscuration/ft to the most sensitive at
1.0% obscuration/ft are available.
Automatic Day/Night Sensitivity Selection - Signature Series
detectors may be programmed for different sensitivities during day
and night periods. This allows the detector to be more sensitive
during unoccupied periods when lower ambient background conditions are expected.
Stability - The 3D detector’s sensitivity remains stable in wind
velocities up to 500 ft/min (2.53 m/sec). Ambient temperature has
very little affect on the detector. The detector may be installed in
rooms with ambient temperatures up to 100oF (38oC).
Electronic Addressing - The loop controller electronically ad-
dresses each detector, saving valuable time during system commissioning. Setting complicated switches or dials is not required. Each
detector has its own unique serial number stored in its on-board
memory. The loop controller identifies each device on the circuit and
assigns a “soft” address to that device’s serial number. If desired,
detectors can be addressed using the SIGA-PRO Signature Program/Service Tool.
Testing & Maintenance
Each detector automatically identifies when it is dirty or defective
and causes a “dirty detector” message. The detector’s sensitivity measurement can also be transmitted to the loop controller. A
sensitivity report can be printed to satisfy NFPA sensitivity measurements which must be conducted at the end of the first year
and every two years thereafter.
The user-friendly maintenance program shows the current state
of each detector and other pertinent messages. Single detectors
may be turned off temporarily, from the control panel. Availability of
maintenance features is dependent on the fire alarm system used.
Scheduled maintenance (Regular or Selected) for proper detector operation should be planned to meet the requirements of the
Authority Having Jurisdiction (AHJ). Refer to current NFPA 72 and
ULC CAN/ULC 536 standards.
Installation
Signature Series detectors mount to North American 1-gang
boxes, 3-1/2 inch or 4 inch octagon boxes, and to 4 inch square
electrical boxes 1-1/2 inches (38 mm) deep. They mount to European BESA and 1-gang boxes with 60.3 mm fixing centers.
Compatibility
The SIGA-PHS detectors are compatible only with the Signature
Loop Controller.
Application
Although photoelectric detectors have a wide range of fire sensing capabilities they are best suited for detecting slow, smoldering
fires. The table below shows six standard test fires used to rate
the sensitivity of smoke and heat detectors. The table indicates
SIGA-HRS and
Test Fire SIGA-PS Photo
Open Wood unsuitable optimum very suitable optimum
Wood Pyrolysis optimum unsuitable optimum optimum
Smouldering Cotton optimum unsuitable optimum optimum
Poly Urethane Foam very suitable suitable very suitable optimum
n-Heptane very suitable very suitable optimum optimum
Liquid Fire without
Smoke
unsuitable optimum very suitable very suitable
SIGA-HFS Rate-ofRise/ Fixed Temp.
that no single sensing element is suited for all test fires.
EDWARDS recommends that this detector be installed according
to latest recognized edition of national and local fire alarm codes.
SIGA-PHS
Photo Heat 3D
SIGA-IPHS
Ion/Photo/Heat 4D
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Not to be used for installation purposes. Issue 1
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