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  • Kidde | Intelligent Optica Photoelectric Duct Smoke Detector, SLC Addressable | KI-DDOS
Intelligent Optica Photoelectric Duct Smoke Detector, SLC Addressable
Kidde Commercial

Intelligent Optica Photoelectric Duct Smoke Detector, SLC Addressable

SKU KD-KI-DDOS

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The Kidde KI-DDOS is a photoelectric duct smoke detector built for commercial HVAC systems. It connects to Kidde Intelligent fire alarm control panels over the SLC loop, drawing power directly from the loop with no additional power supply required. Environmental compensation with differential sensing cuts nuisance alarms from dust and humidity without sacrificing detection speed.

Built for the commercial fire installer

UL, ULC, CSFM, and FM listed. The KI-DDOS handles air velocities from 100 to 4,000 ft/min and operating temperatures from -20F to 158F, covering rooftop units and interior air handlers alike. Standard sampling tube spacing matches existing duct cutouts for drop-in migration from legacy detectors - no new duct penetrations needed.

Key features

  • Photoelectric detection with environmental compensation: differential sensing reduces nuisance alarms from dust buildup and humidity changes
  • SLC loop-powered: draws 50 A standby / 60 A alarm directly from the signaling line circuit - no external power supply needed
  • Standard sampling tube spacing: drop-in replacement for legacy duct detectors without new duct penetrations
  • Form C auxiliary alarm relay: rated 3.0A @ 30 VDC / 120 VAC for HVAC shutdown or fan control
  • Remote test and reset via SLC: no ladder needed after initial install - test and reset from the FACP
  • Conformally coated circuit boards: resist corrosion in high-humidity duct environments

System requirements

Requires a Kidde Intelligent fire alarm control panel with an available SLC address. Sampling tubes (5 ft. standard) are supplied; optional 10 ft. tubes available for wider duct runs. Wire size 14-22 AWG.

Specifications

SKUKD-KI-DDOS
BrandKidde Commercial
Form factorDuct-mounted smoke detector
Detection methodPhotoelectric (light scattering)
CommunicationSLC (Signaling Line Circuit)
Power inputSLC loop-powered, 15.2-19.95 VDC
Standby current50 µA typical
Alarm current60 µA typical
Operating temp-20°F to 158°F (-29°C to 70°C)
Operating humidity0 to 93% RH, noncondensing
Air velocity range100 to 4,000 ft/min
Air pressure differential0.01 to 0.83 inches of water
Sensitivity range1.5 to 4.5%/ft obscuration
Alarm test response time5 seconds
Alarm relayForm C, 3.0A @ 30 VDC, 3.0A @ 120 VAC, 1.5A @ 240 VAC
LED indicatorsAlarm (red), Test (amber), Normal (green)
Wire size14 to 22 AWG
Sampling tubes5 ft. standard supplied (up to 10 ft. optional)
Dimensions7.75 x 6.1 x 2.5 in (197 x 155 x 65 mm)
ComplianceUL, ULC, CSFM, FM
CompatibilityKidde Intelligent fire alarm control panels

Documents and resources

FAQs

What fire panel does the KI-DDOS require?
Requires a Kidde Intelligent fire alarm control panel with an available SLC loop address. The detector communicates and draws power over the signaling line circuit.
Does the KI-DDOS need a separate power supply?
No. It draws power directly from the SLC loop (15.2-19.95 VDC). Standby current is just 50 µA.
Can the KI-DDOS replace an existing duct detector?
Yes. Standard sampling tube spacing allows drop-in migration from legacy duct detectors without new duct penetrations.
What air velocity range does the KI-DDOS support?
100 to 4,000 ft/min, covering most commercial HVAC applications from interior air handlers to rooftop units.
How do you test the KI-DDOS after installation?
Two methods: remote test and reset from the FACP via SLC, or a magnet-activated test switch on the detector housing. Alarm test response time is 5 seconds.
Does the KI-DDOS include a relay for HVAC shutdown?
Yes. One Form C auxiliary alarm relay rated 3.0A @ 30 VDC / 3.0A @ 120 VAC / 1.5A @ 240 VAC for HVAC shutdown or fan control integration.
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