TM INTERNATIONAL

EDWARDS SYSTEMS TECHNOLOGY ANALOG ADDRESSABLE INITIATING DEVICES

Intelligent Photoelectric
Smoke Detector
Model SIGA-PS

Note: Some features described here may not be supported by all

control systems. Check your control panel’s Installation and
Operation Guide for details.

Features
! Integral microprocessor
S
CHINA

Application Notes
! Non-volatile memory Available

! Automatic mapping device

! Electronic addressing
The information stored in the detector’s memory includes:
! Environmental compensation
- detector type, serial number, and address
! Intelligent detector
- date of manufacture, hours of operation, and last maintenance date²
! Wide 0.67% to 3.77%/ft. sensitivity range
- current detector sensitivity and environmental compensation
! Twenty pre-alarm sensitivity values, set in 5% increments¹
values
! Identification of dirty or defective detectors
- original detector sensitivity values upon manufacturing²
! Automatic day/night sensitivity adjustment
- number of recorded alarms and troubles²
! Twin RED/GREEN status LEDs
- time and date of last alarm¹
! Standard, relay, fault isolator, and audible mounting bases
- analog signal patterns just before the last alarm¹
! Designed and manufactured to ISO 9001 standards
- most recent trouble code logged by the detector — 32 possible
trouble codes may be used to diagnose faults.

Description In the unlikely event that an unwanted alarm does take place, the
control panel’s history file can be called up to help isolate the
EST’s Signature Series Model SIGA-PS Intelligent Photoelectric problem and prevent it from happening again.
Smoke Detector gathers analog information from its smoke sensing
element and converts it into digital signals. The detector’s on- Automatic Device Mapping - The loop controller learns where
board microprocessor measures and analyzes these signals. It each device’s serial number address is installed relative to other
compares the information to historical readings and time patterns devices on the circuit. The mapping feature provides supervision
to make an alarm decision. Digital filters remove signal patterns of each device’s installed location to prevent a detector from
that are not typical of fires. Unwanted alarms are virtually elimi- being reinstalled (after cleaning etc.) in a different location from
nated. where it was originally. The history log for the detector remains
relevant and intact regardless of its new location.
The microprocessor in each detector provides four additional benefits
- Self-diagnostics and History Log, Automatic Device Mapping, The Signature Series Data Entry Program also uses the mapping
Stand-alone Operation and Fast, Stable Communication. feature. With interactive menus and graphic support, the wired
circuits between each device can be examined. Layout or “as-built”
Self-diagnostics and History Log - Each Signature Series detector drawing information showing wire branches (T-taps), device types
constantly runs self-checks to provide important maintenance and their address are stored on disk for printing hard copy. This
information. The results of the self-check are automatically updated takes the mystery out of the installation. The preparation of “as-built”
and permanently stored in the detector’s non-volatile memory. drawings is fast and efficient.
This information is accessible for review any time at the control
panel, PC, or by using the SIGA-PRO Signature Program/Service Device mapping allows the Signature loop controller to discover:
Tool. - unexpected additional device addresses
- missing device addresses
¹ EST3 V.2 only.
2
Retrievable with SIGA-PRO programming tool. - changes to the wiring in the circuit.

EST I N T E R N AT I O N A L
201 CITY CENTRE DRIVE SUITE 500, MISSISSAUGA, ONTARIO, CANADA L5B 2T4
PHONE : (001) 905-270-1711 • FAX: (001) 905-270-9553 • WORLD WIDE WEB: WWW.ESTINTERNATIONAL .COM
U.S. SALES: SARASOTA, FL; PHONE 941-739-4638; FAX 941-727-1214 • CANADA SALES: OWEN SOUND, ON; PHONE 519-376-2430; FAX 519-376-7258
Issue 5 Literature Sheet #85001-0269 Page 1 of 4
Not to be used for installation purposes.
Stand-alone Operation: A decentralized alarm decision by the Status LEDs: Twin LEDs are visible from any direction. A flashing
detector is guaranteed. On-board intelligence permits the detector GREEN LED shows normal system polling from the loop
to operate in stand-alone mode. If loop controller CPU communi- controller. A flashing RED LED means the detector is in alarm
cations fail for more than four seconds, all devices on that circuit state. Both LEDs on steady shows alarm state - stand-alone mode.
go into stand-alone mode. The circuit acts like a conventional alarm Normal GREEN LED activity is not distracting to building occupants,
receiving circuit. Each detector on the circuit continues to collect but can be quickly spotted by a maintenance technician.
and analyze information from its surroundings. The detector alarms Quality and Reliability: EST detectors are manufactured in North
if the preset smoke obscuration level is reached. If the detector is America to strict international ISO 9001 standards. All electronics
mounted to a relay base, the relay operates. Similarly, if it is utilize surface mount technology (SMT) for smaller size and greater
mounted to an audible base, the on-board horn sounds. immunity to RF noise. A conformal coating is used for humidity
Fast Stable Communication: On-board intelligence means less and corrosion resistance. All critical contacts are gold plated.
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 response
Installation
time and allows a lower baud rate (speed) to be used for Signature Series detectors mount to North American 1-gang
communication on the loop. The lower baud rate offers several boxes, 3-1/2 inch or 4 inch octagon boxes, and to 4 inch square
advantages including: electrical boxes 1-1/2 inches (38 mm) deep. They mount to
- less sensitivity to circuit wire characteristics European BESA and 1-gang boxes with 60.3 mm fixing centers.
- less sensitivity to noise glitches on the cable
- less emitted noise from the data wiring
- twisted or shielded wiring is not required.
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.
Environmental Compensation: Detection sensitivity is virtually
independent of its installed environment and its physical condition.
Environmental compensation means the sensing element adapts to
long-term changes caused by dirt, humidity, aging etc. It even com-
pensates for small amounts of normal ambient smoke. Approximately
six times every hour the detector adjusts and updates the sensitivity
(% obscuration) baseline for its sensing element. Approximately
once every hour this information is written to its permanent memory.
The detector’s “learned” baseline is not lost, even when the detector
is removed for cleaning. Signature Series environmental
compenstion is so reliable that it meets NFPA72 field sensitivity Testing & Maintenance
testing requirements — without the need for external meters. Each detector automatically identifies when it is dirty or defective
The detector’s sensitivity setting selected by the installer floats up and causes a “dirty detector” message. The detector’s sensitivity
or down to remain constant relative to the changing baseline. This measurement can also be transmitted to the loop controller. A
is called differential sensing. sensitivity report can be printed to satisfy NFPA sensitivity meas-
urements which must be conducted at the end of the first year and
Sensitivity Range: The SIGA-PS Photoelectric Detector has a every two years thereafter.
sensitivity range or window of 0.67% to 3.77%. The installer
selects the detector’s ALARM sensitivity level from five available The user-friendly maintenance program shows the current state of
settings within the range. each detector and other pertinent messages. Single detectors may
be turned off temporarily from the control panel. Availability of
Pre-Alarm: The detector stores one of 20 pre-alarm sensitivity values maintenance features is dependent on the fire alarm system used.
to alert local personnel prior to the sensor reaching a full evacuation Scheduled maintenance (Regular or Selected) for proper detector
sensitivity. Sensitivity values can be set in 5% increments.1 operation should be planned to meet the requirements of the
Automatic Day/Night Sensitivity Selection: Signature Series Authority Having Jurisdiction (AHJ). Refer to current NFPA 72 and
detectors may be programmed for different sensitivities during day ULC CAN/ULC 536 standards.
and night periods. This allows the detector to be more sensitive
during unoccupied periods when lower ambient background
conditions are expected. Compatibility
Stability: The SIGA-PS detector’s sensitivity remains stable in wind The SIGA-PS detectors are compatible only with EST’s Signature
velocities up to 5,000 ft/min (25.3 m/sec). Ambient temperature has Loop Controller.
very little affect on the detector. The detector may be installed in
rooms with ambient temperatures up to 120oF (49oC). ¹ EST3 V.2 only.

EST I N T E R N AT I O N A L
Page 2 of 4 Literature Sheet #85001-0269 Issue 5
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 that no single
sensing element is suited for all test fires.
EST recommends that this detector be installed according to latest recognized edition of national and local fire alarm codes.

Type of Detector
SIGA-HRS and
SIGA-HFS Rate-of SIGA-PHS SIGA-IPHS
Test Fire SIGA-IS Ion SIGA-PS Photo -Rise/Fixed Temp. Photo/Heat 3D Ion/Photo/Heat 4D
Open Wood optimum unsuitable optimum very suitable optimum
Wood Pyrolysis suitable optimum unsuitable optimum optimum
Smouldering Cotton very suitable optimum unsuitable optimum optimum
Poly Urethane Foam very suitable very suitable suitable very suitable optimum
n-Heptane optimum very suitable very suitable optimum optimum
Liquid Fire without
unsuitable unsuitable optimum very suitable very suitable
Smoke

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.
Note: Sizes #16 AWG (1.0mm2) and #18 AWG (0.75mm2) are preferred for ease of installation. See Signature Loop Controller catalog
sheet for detailed wiring requirement specifications.

Standard Detector Base, SIGA-SB, SIGA-SB4 Relay Detector Base, SIGA-RB, SIGA-RB4

Term Description Term Description

1 Not Used 1 Normally Open
2 DATA IN/OUT (+) 2 DATA IN/OUT (+)
3 Not Used 3 Common
4 DATA IN (-) 4 DATA IN (-)
4 Remote LED (-) 4 Not Used
5 Remote LED (+) 5 Normally-Closed
6 Not Used 6 DATA OUT (-)
7 DATA OUT (-)
CONTACT RATING
1.0 Amp @ 30 VDC
(Pilot Duty)

Isolator Detector Base, SIGA-IB, SIGA-IB4 Audible Detector Base, SIGA-AB4

Jumper JW1 Jumper JW2
Term Description OUT = Low Volume OUT = Steady Tone
1 Not Used IN = High Volume IN = Temporal Tone
DATA (+) IN/OUT

JW1 JW2
2 DATA IN/OUT (+)
DATA (-) OUT
DATA (-) IN

3 DATA IN (-)
SIG +
SIG -

4 Not Used
5 Not Used
6 DATA OUT (-)
7 Not Used
From Power Supply To Next Sounder Base or
or Previous Sounder Base E-O-L Relay
24 VDC IN (+) 24 VDC OUT (+)
24 VDC IN (-) 24 VDC OUT (-)
DATA OUT (-)
DATA IN (-) To Next Signature Device
DATA IN (+) DATA OUT (+)
From Signature Controller
or Previous Device

EST I N T E R N AT I O N A L
Issue 5 Literature Sheet #85001-0269 Page 3 of 4
Accessories Warnings & Cautions
All detector mounting bases have wiring terminals that are This detector will not operate without electrical power. As fires
accessible from the “room-side” after mounting the base to the frequently cause power interruption, we suggest you discuss further
electrical box. The bases mount to North American 1-gang boxes safeguards with your fire protection specialist.
and to 3½ inch or 4 inch octagon boxes, 1½ inches (38 mm) deep.
This detector will NOT sense fires that start in areas where smoke
They also mount to European BESA and 1-gang boxes with 60.3
cannot reach the detector. Smoke from fires in walls, roofs, or on the
mm fixing centers. The SIGA-SB4, SIGA-RB4, and SIGA-IB4 mount
opposite side of closed doors may not reach the detector to alarm it.
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.

Specifications
Catalog Number SIGA-PS
Sensing Element Photoelectric - Light Scattering Principle
Air Velocity Range: 0 to 5,000 ft/min (0 to 25.39 m/s);
Storage &
SIGA-AB4 SIGA-SB SIGA-IB SIGA-RB SIGA-LED Humidity: 0 to 93% RH, Non-Condensing
Operating
Audible Base Standard Base Isolator Base Relay Base Remote LED Operating Temp: 32ºF to 120ºF (0ºC to 49ºC);
Environment
Storage Temp: -4ºF to 140ºF (-20ºCto 60ºC)
Standard Base SIGA-SB, SIGA-SB4 - This is the basic mounting Sensitivity Range ULI/ULC - 0.67% to 3.77% obscuration/foot
base for EST Signature Series detectors. The SIGA-LED Remote User Selected Most Sensitive: 1.0%/ft.; More Sensitive: 2.0%/ft.;
LED is supported by the Standard Base. Alarm Sensitivity Normal: 2.5%/ft.;
Settings Less Sensitive: 3.0%/ft.; Least Sensitive: 3.5%/ft.
Relay Base SIGA-RB, SIGA-RB4 - This base includes a relay.
Pre-alarm Sensitivity 5% increments, allowing up to 20 pre-alarm settings
Normally open or closed operation is selected during installation.
The dry contact is rated for 1 amp (pilot duty) @ 30 Vdc. The relay’s Operating Voltage 15.2 to 19.95 Vdc (19 Vdc nominal)
position is supervised to avoid accidentally jarring it out of position. Quiescent: 45µA @ 19 V; Alarm: 45µA @ 19 V
Emergency Stand-alone Alarm Mode: 18mA
The SIGA-RB can be operated as a control relay if programmed to Operating Current
Pulse Current: 100 µA (100 msec);
do so at the control panel (EST3 V.2 only). The relay base does not During Communication: 9 mA max.
support the SIGA-LED Remote LED. Construction & Finish High Impact Engineering Polymer - White
Audible Base SIGA-AB4 - This base is designed for use where Compatible SIGA-SB Standard Base, SIGA-RB Relay Base,
localized or group alarm signaling is required. When the detector Mounting Bases SIGA-IB Isolator Base, SIGA-AB Audible Base
senses an alarm condition, the audible base emits a local alarm On-board Green LED - Flashes when polled;
signal. The optional SIGA-CRR Polarity Reversal Relay can be used On-board Red LED - Flashes when in alarm
for sounding to other audible bases on the same 24 Vdc circuit. LED Operation Both LEDs - Glow steady when in alarm (stand-alone)
Compatible Remote Red LED (model SIGA-LED)
Relay and Audible Bases operate as follows: Flashes when in alarm
- at system power-up or reset, the relay is de-energized Compatibility Use With: SIGNATURE Loop Controller
- when a detector is installed in the base with the power Address Requirements Uses one Device Address
on, the relay energizes for four seconds, then de-energizes Agency Listings UL, ULC, MEA, CSFM
- when a detector is removed from a base with the power on, UL Listed Spacing 30 ft
the relay is de-energized
- when the detector enters the alarm state, the relay is energized.
Isolator Base SIGA-IB, SIGA-IB4 - This base includes a built-in line Ordering Information
fault isolator for use on Class A circuits. A detector must be
installed for it to operate. The isolator base does not support the Catalog Ship Wt.
SIGA-LED Remote LED. Number Description lbs (kg)
Intelligent Photoelectric Detector
The isolator operates as follows: SIGA-PS .5 (.23)
- UL/ULC Listed
- a short on the line causes all isolators to open within 23 msec Accessories
- at 10 msec intervals, beginning on one side of the Class A SIGA-SB Detector Mounting Base - Standard
circuit nearest the loop controller, the isolators close to 4-inch Detector Mounting Base
SIGA-SB4
provide the next isolator down the line with power c/w SIGA-TS4 Trim Skirt
- when the isolator next to the short closes, reopens within 10 msec. SIGA-RB Detector Mounting Base w/Relay
4-inch Detector Mounting Base w/Relay,
The process repeats beginning on the other side of the loop SIGA-RB4
c/w SIGA-TS4 Trim Skirt .2 (.09)
controller.
Detector Mounting Base
SIGA-IB
Remote LED SIGA-LED - The remote LED connects to the SIGA-SB w/Fault Isolator
or SIGA-SB4 Standard Base only. It features a North American size 4-inch Detector Mounting Base
SIGA-IB4
1-gang plastic faceplate with a white finish and red alarm LED. w/ Fault Isolator, c/w SIGA-TS4 Trim Skirt
SIGA-LED Remote 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 SIGA-AB4 Audible (Sounder) Base .3 (0.15)
imperfections not covered by the smaller bases. SIGA-TS4 Trim Skirt (supplied with 4-inch bases) .1 (.04)

EST I N T E R N AT I O N A L
It is our intention to keep the product information current and accurate. We can not cover specific applications or anticipate all requirements.
All specifications are subject to change without notice. For more information or questions relative to this Specification Sheet, contact EST International.
Printed in Canada
© 1999 EST
Page 4 of 4 Literature Sheet #85001-0269 Issue 5