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Edwards EST SIGA-DDOS Optica Intelligent Addressable HVAC Duct Smoke Detector
- Regular price
- $389.00
- Sale price
- $389.00
- Regular price
-
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Product Description P/N: SIGA-DDOS
Description
The Edwards EST SIGA-DDOS is an Optica intelligent addressable duct smoke detector designed to detect smoke in HVAC ductwork before it can circulate throughout a building. Edwards EST part number SIGA-DDOS combines photoelectric light-scattering detection, Signature Series intelligence, environmental compensation, and an onboard Form C relay for reliable smoke detection and auxiliary HVAC control.
Technical Specifications
| Condition | New/Never Used Surplus |
| Brand | Edwards EST |
| Category | Fire Alarm & Life Safety |
| Part Number | SIGA-DDOS |
| Subcategory | Duct Smoke Detectors |
| Series | Optica / Signature Series |
| Product Type | Intelligent Addressable Duct Smoke Detector |
| Detection Method | Photoelectric Light Scattering |
| Operating Voltage | 15.2–19.95 VDC |
| Operating Current | 50 μA Standby; 60 μA Alarm |
| Smoke Sensitivity | 1.5%–4.5% Obscuration/ft |
| Air Velocity Rating | 100–4,000 ft/min |
| Air Pressure Differential | 0.01–0.83 in. of Water |
| Alarm Test Response Time | 5 Seconds |
| Auxiliary Relay | One Form C, Unsupervised, Power-Limited |
| Relay Rating | 3 A @ 30 VDC; 3 A @ 120 VAC (0.35 PF); 1.5 A @ 240 VAC (0.35 PF) |
| LED Indicators | Alarm – Red; Test – Amber; Normal – Green |
| Operating Temperature | -20°F to 158°F (-29°C to 70°C) |
| Relative Humidity | 0–93% RH, Noncondensing |
| Wire Size | 14–22 AWG |
| Dimensions | Approx. 7.75 × 6.1 × 2.5 in. (197 × 155 × 65 mm) |
| Agency Listings | UL, ULC, CSFM |
| Weight | Approx. 1.5 lb (0.68 kg) |
Information About SIGA-DDOS
The SIGA-DDOS is an Edwards Optica and Signature Series intelligent duct detector designed for connection to compatible Edwards Signature loop controllers. Its photoelectric sensing system uses digital signal processing, environmental compensation, and differential sensing to evaluate smoke conditions while compensating for environmental changes and detector contamination. The low-profile housing is less than 2.5 inches deep and accommodates adjustable sampling-tube positioning, allowing installation in restricted HVAC spaces and ducts with air velocities from 100 to 4,000 ft/min. Integrated diagnostics, dirty or defective detector identification, LED status indication, a magnet-activated test function, and a Form C auxiliary relay simplify commissioning, maintenance, and HVAC equipment control.
Key Features:
- Optica photoelectric detection: Uses the light-scattering principle to detect smoke particles in air moving through HVAC ductwork.
- Signature Series intelligence: Provides intelligent addressable operation with compatible Edwards Signature loop controllers.
- Wide airflow range: Rated for duct air velocities from 100 to 4,000 ft/min for diverse HVAC applications.
- Broad sensitivity range: Supports smoke sensitivity from 1.5% to 4.5% obscuration per foot.
- Environmental compensation: Adjusts for changing environmental conditions to maintain stable detection performance over time.
- Differential sensing: Analyzes changing conditions to improve detection reliability and reduce unwanted alarm activity.
- Low-profile housing: Less than 2.5 inches deep for installations where available duct or ceiling space is limited.
- Flexible sampling tube: Sampling tube can be rotated in 45-degree increments for alignment with duct airflow.
- Integrated auxiliary relay: One Form C alarm relay provides switching capability for HVAC shutdown and other ancillary equipment.
- Status indication: Red alarm, amber test, and green normal LEDs provide clear local operating information.
- Magnet-activated testing: Allows convenient functional testing during commissioning and scheduled fire alarm maintenance.
- Detector diagnostics: Identifies dirty or defective detector conditions to simplify troubleshooting and preventive maintenance.
The SIGA-DDOS delivers the reliability and precision required for intelligent duct smoke detection, HVAC shutdown control, and addressable fire alarm monitoring.
Description
The Edwards EST SIGA-DDOS is an Optica intelligent addressable duct smoke detector designed to detect smoke in HVAC ductwork before it can circulate throughout a building. Edwards EST part number SIGA-DDOS combines photoelectric light-scattering detection, Signature Series intelligence, environmental compensation, and an onboard Form C relay for reliable smoke detection and auxiliary HVAC control.
Technical Specifications
| Condition | New/Never Used Surplus |
| Brand | Edwards EST |
| Category | Fire Alarm & Life Safety |
| Part Number | SIGA-DDOS |
| Subcategory | Duct Smoke Detectors |
| Series | Optica / Signature Series |
| Product Type | Intelligent Addressable Duct Smoke Detector |
| Detection Method | Photoelectric Light Scattering |
| Operating Voltage | 15.2–19.95 VDC |
| Operating Current | 50 μA Standby; 60 μA Alarm |
| Smoke Sensitivity | 1.5%–4.5% Obscuration/ft |
| Air Velocity Rating | 100–4,000 ft/min |
| Air Pressure Differential | 0.01–0.83 in. of Water |
| Alarm Test Response Time | 5 Seconds |
| Auxiliary Relay | One Form C, Unsupervised, Power-Limited |
| Relay Rating | 3 A @ 30 VDC; 3 A @ 120 VAC (0.35 PF); 1.5 A @ 240 VAC (0.35 PF) |
| LED Indicators | Alarm – Red; Test – Amber; Normal – Green |
| Operating Temperature | -20°F to 158°F (-29°C to 70°C) |
| Relative Humidity | 0–93% RH, Noncondensing |
| Wire Size | 14–22 AWG |
| Dimensions | Approx. 7.75 × 6.1 × 2.5 in. (197 × 155 × 65 mm) |
| Agency Listings | UL, ULC, CSFM |
| Weight | Approx. 1.5 lb (0.68 kg) |
Information About SIGA-DDOS
The SIGA-DDOS is an Edwards Optica and Signature Series intelligent duct detector designed for connection to compatible Edwards Signature loop controllers. Its photoelectric sensing system uses digital signal processing, environmental compensation, and differential sensing to evaluate smoke conditions while compensating for environmental changes and detector contamination. The low-profile housing is less than 2.5 inches deep and accommodates adjustable sampling-tube positioning, allowing installation in restricted HVAC spaces and ducts with air velocities from 100 to 4,000 ft/min. Integrated diagnostics, dirty or defective detector identification, LED status indication, a magnet-activated test function, and a Form C auxiliary relay simplify commissioning, maintenance, and HVAC equipment control.
Key Features:
- Optica photoelectric detection: Uses the light-scattering principle to detect smoke particles in air moving through HVAC ductwork.
- Signature Series intelligence: Provides intelligent addressable operation with compatible Edwards Signature loop controllers.
- Wide airflow range: Rated for duct air velocities from 100 to 4,000 ft/min for diverse HVAC applications.
- Broad sensitivity range: Supports smoke sensitivity from 1.5% to 4.5% obscuration per foot.
- Environmental compensation: Adjusts for changing environmental conditions to maintain stable detection performance over time.
- Differential sensing: Analyzes changing conditions to improve detection reliability and reduce unwanted alarm activity.
- Low-profile housing: Less than 2.5 inches deep for installations where available duct or ceiling space is limited.
- Flexible sampling tube: Sampling tube can be rotated in 45-degree increments for alignment with duct airflow.
- Integrated auxiliary relay: One Form C alarm relay provides switching capability for HVAC shutdown and other ancillary equipment.
- Status indication: Red alarm, amber test, and green normal LEDs provide clear local operating information.
- Magnet-activated testing: Allows convenient functional testing during commissioning and scheduled fire alarm maintenance.
- Detector diagnostics: Identifies dirty or defective detector conditions to simplify troubleshooting and preventive maintenance.
The SIGA-DDOS delivers the reliability and precision required for intelligent duct smoke detection, HVAC shutdown control, and addressable fire alarm monitoring.