Overview
The Signature Series SIGA-PHD detector brings advanced
multisensor technology to a practical design that increases
efficiency, saves installation time, cuts costs, and extends
life safety and property protection capabilities. Continuous
self-diagnostics ensures reliability over the long-haul, while
environmental compensation helps reduce maintenance costs.
The SIGA-PHD provides an optical smoke sensor and a rateof-rise heat sensor with a fixed temperature setting. Together
these sensors efficiently detect smoldering fires, as well as fast
flaming fires.
Like all Signature Series detectors, the SIGA-PHD gathers analog
information from its sensing elements and converts this data into
digital signals. To make an alarm decision, the detector’s on-board
microprocessor measures and analyzes smoke and heat sensor
readings and compares this information to historical data. Digital
filters remove signal patterns that are not typical of fires, thus
virtually eliminating unwanted alarms.
Smoke detection
The SIGA-PHD detects extremely small particles of combustion
and triggers an alarm at the first sign of smoke. Thanks to its highperformance forward-scattering reflective response technology,
the photoelectric smoke sensor responds quickly and reliably to
a wide range of fire types, especially slow burning fires fuelled by
combustibles typically found in modern multi-use buildings.
Heat detection
SIGA-PHD’s on-board rate-of-rise heat sensor provides a 15 °F
(9 °C) per minute for the detection of fast-developing fires while
also providing a 135 °F (57.2 °C) fixed detection threshold. The
heat sensors monitor the temperature of the air and determines
whether an alarm should be initiated.
Compatibility
The SIGA-PHD detector is compatible only with the Signature
Loop Controller.
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. See mounting base
installation and wiring for more information.
Testing & Maintenance
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, NFPA 720, and ULC CAN/ULC 536 standards.
Smoke Sensor Sensitivity
The SIGA-PHD determines when its optical sensor is dirty or
defective and can transmit sensitivity data to the loop controller.
A sensitivity report can also be printed to satisfy NFPA sensitivity
measurements which must be conducted at the end of the first
year and every two years thereafter. The availability of maintenance
features depends on the fire alarm system used.
Sensing and reporting technology
The microprocessor in each detector provides 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.
Automatic Device Mapping – The loop controller learns where
each device’s serial number address is installed relative to other
devices on the circuit. The 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.
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.
Accessories
Detector mounting bases have wiring terminals that are
accessible from the “room-side” after mounting the base to the
electrical box. The bases mount to North American 1-gang boxes
and to 3½ inch or 4 inch octagon boxes, 1½ inches (38 mm)
deep. They also mount to European BESA and 1-gang boxes with
60.3 mm fixing centers. The SIGA-SB4, SIGA-RB4, and SIGA-IB4
mount to North American 4 inch sq. electrical boxes in addition to
the above boxes. They include the SIGA-TS4 Trim Skirt, which is
used to cover the “mounting ears” on the base. Sounder bases
mount to a 4 inch square boxes only.
Remote LED SIGA-LED – The remote LED connects to the
SIGA-SB or SIGA-SB4 Standard Base only. It features a North
American size 1-gang plastic faceplate with a white finish and
red alarm LED.
SIGA-TS4 Trim Skirt – Supplied with 4 inch bases, it can also
be ordered separately to use with the other bases to help hide
surface imperfections not covered by the smaller bases.
Sounder Bases – Signature Series sounder bases are designed
for use where localized or group alarm signaling is required.
• SIGA-AB4G bases provide sounder capability to Signature
Series smoke and heat detectors. They are not for use with
devices that include a CO sensor.
• SIGA-AB4GT bases provide sounder capability to Signature
Series smoke and heat detectors, as well as Signature
detectors that include a CO Sensor when used with a SIGATCDR Temporal Pattern Generator to separate CO (TC4) and
Fire (TC3) tone patterns.
• SIGA-AB4G-LF bases provide 520 Hz low frequency
sounder capability to Signature Series smoke and heat
detectors, as well as Signature detectors that include a CO
Sensor when used with a SIGA-TCDR Temporal Pattern
Generator to separate CO (TC4) and Fire (TC3) tone patterns.
The SIGA-AB4G-LF is suitable for applications requiring low
frequency audible tones.
Typical Wiring
The detector mounting bases accept #18 AWG (0.75mm2 ),
#16 (1.0mm2 ), #14 AWG (1.5mm2 ), and #12 AWG (2.5mm²)
wire sizes. Sizes #16 AWG (1.0mm2 ) and #18 AWG (0.75mm2 )
are preferred for ease of installation.
Isolator Detector Base, SIGA-IB, SIGA-IB4
This base includes a built-in line fault isolator for use on Class A
circuits. A detector must be installed for it to operate. The isolator
base does not support the SIGA-LED Remote LED.
The isolator operates as follows:
– a short on the line causes all isolators to open within 23 msec
– at 10 msec intervals,beginning
on one side of the Class A circuit nearest the loop
controller, the isolators close to provide the
next isolator down the line with power
– when the isolator next to the short closes, it
reopens within 10 msec.
The process repeats beginning on
the other side of the loop controller.
Relay Detector Base, SIGA-RB, SIGA-RB4
This base includes a relay.
Normally Open or Normally Closed operation is selected
during installation. The dry contact is rated for 1 amp
(pilot duty) @ 30 Vdc. The relay’s position is supervised
to avoid accidentally jarring it out of position. The SIGA-RB
can be operated as a control relay if programmed to do so
at the control panel. The relay base does not support the
SIGA-LED Remote LED.
Warnings & Cautions
• This detector does not operate without electrical power.
As fires frequently cause power interruption, discuss further
safeguards with the local fire protection specialist.
• This detector does not sense fires in areas where smoke or
heat cannot reach the detector. Smoke or heat from fires in
walls, roofs, or on the opposite side of closed doors may not
reach the detector.
• Photoelectric detectors have a wide range of sensing
capabilities, and are best suited for detecting slow, smoldering
fires. The heat sensor in this device provides a source of
supplemental information. The heat sensor by itself does
not provide life safety protection.
• In Canada, install according to the CAN/ULC-S524
Standard for the Installation of Fire Alarm Systems, the
CSA C22.1 Canadian Electrical Code, and the local authority
having jurisdiction.
• Upon completion of the original installation and following any
modifications or additions to the system, perform a calibrated
sensitivity test per NFPA code. Signature Series devices
can perform this test and the panel can generate a system
sensitivity report.
