Edwards SIGA-OSCD Smoke and CO Detector

The Edwards SIGA-OSCD is a commercial intelligent multisensor smoke and carbon monoxide (CO) detector designed for compatible Edwards Signature Series fire alarm systems. It combines advanced multi-criteria optical smoke sensing with integrated life-safety carbon monoxide detection, providing reliable fire and CO protection from a single addressable device.

Using Signature Optica™ technology, the SIGA-OSCD analyzes data from multiple optical sensors with dual wavelengths and multiple detection angles to distinguish real fire conditions from common nuisance sources such as cooking particulates. Environmental compensation, self-diagnostics, and programmable sensitivity settings help maintain dependable long-term performance while reducing maintenance requirements. This product is intended exclusively for commercial fire alarm installations.

Product Functions

• Detects smoke using multi-criteria optical sensing
• Detects life-safety carbon monoxide (CO)
• Differentiates nuisance particles from actual smoke
• Reports smoke and CO alarm conditions independently
• Continuously supervises detector status
• Performs automatic self-diagnostics
• Provides environmental compensation
• Stores operating history in nonvolatile memory
• Supports automatic day/night sensitivity adjustment
• Communicates with compatible Signature Series fire alarm control panels

Electrical & System Information

The SIGA-OSCD operates on compatible Edwards Signature Series Signaling Line Circuits (SLC), receiving both operating power and communication over the data loop. Electronic addressing is automatically assigned by the Signature controller, eliminating manual address switches.

The detector independently analyzes smoke and carbon monoxide conditions, allowing the fire alarm control panel to distinguish between fire alarms, CO alarms, or combined alarm events. Continuous electronic supervision monitors detector condition, contamination level, and communication integrity.

Features

• Commercial intelligent smoke and CO detector
• Multi-criteria optical smoke sensing
• Integrated carbon monoxide sensor
• Signature Optica™ technology
• Electronic addressing
• Automatic device mapping
• Environmental compensation
• Dirty detector monitoring
• Twenty programmable pre-alarm settings
• Five programmable sensitivity levels
• Automatic day/night sensitivity adjustment
• Nonvolatile memory
• Bicolor green/red status LED
• Compatible with standard, relay, isolator, and audible bases

Mounting & Design

The SIGA-OSCD installs on compatible Edwards Signature Series detector bases using a low-profile plug-in design that allows quick installation and replacement without disturbing field wiring.

Electronic addressing simplifies commissioning while automatic device mapping assists system documentation and maintenance. The detector includes clear sensor markings to support inspection and functional testing.

Protection & Applications

Suitable for:

• Office Buildings
• Schools and Universities
• Hospitals
• Hotels
• Healthcare Facilities
• Assisted Living Facilities
• Apartment Buildings
• Government Buildings
• Commercial Fire Alarm Systems

Compatibility

Compatible with:

• Edwards Signature Series Fire Alarm Control Panels
• Signature Loop Controllers
• IO Series Fire Alarm Systems
• SIGA-SB Standard Detector Base
• Signature Relay Bases
• Signature Fault Isolator Bases
• Signature Audible Bases

Always verify compatibility with the installed Edwards fire alarm control panel, Signature loop controller, detector base, firmware version, and project requirements before installation.

Technical Specifications

Manufacturer: Edwards
Parent Company: Carrier
Model: SIGA-OSCD
Series: Signature Optica™
Product Type: Intelligent Smoke and CO Detector
Detection Method: Multi-Criteria Optical Smoke and Carbon Monoxide
Smoke Sensitivity Range: 0.5–4.36% Obscuration/ft (1.6–13.6%/m)
Communication: Signature Series Data Loop
Addressing: Electronic Automatic Addressing
Status Indicator: Bicolor Green/Red LED
Environmental Compensation: Two Levels
Dirty Detector Warning: Two Levels
Pre-Alarm Settings: 20
Sensitivity Settings: 5
Automatic Day/Night Sensitivity: Yes
Ground Fault Detection: Supported by Module
Maximum Devices Per Loop: Up to 250 Signature Addresses
Memory: Nonvolatile
Mounting: Compatible Signature Detector Base Required
Application: Indoor Commercial Fire Alarm Systems

Listings: UL 268 7th Edition listed for smoke detection and applicable life-safety carbon monoxide listings when installed as part of a compatible Edwards Signature Series system. Verify product labeling and project requirements before installation.

Applications

The Edwards SIGA-OSCD is designed for commercial fire alarm systems requiring both intelligent smoke detection and life-safety carbon monoxide monitoring from a single addressable device. Typical applications include office buildings, healthcare facilities, schools, hotels, assisted living centers, apartment buildings, government facilities, and other commercial occupancies utilizing compatible Edwards Signature Series fire alarm systems.