SS&Si
Kidde Commercial
Kidde | SuperDuct Four-Wire Duct Smoke Detector, Controller with Sensor, RJ45 | SD-4WJ

SuperDuct Four-Wire Duct Smoke Detector, Controller with Sensor, RJ45

SKU KD-SD-4WJ

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Questions? Call us 866-364-0030The SS&Si dealer team

The SD-4WJ pairs a SuperDuct controller and sensor in one RJ45-ready package, dropping into ductwork under 2 inches deep and giving an installer everything needed for a single-airstream install without ordering the controller and sensor separately.

Built for the commercial fire installer

Patented differential sensing checks the environment every eight minutes and automatically compensates for dirt and humidity, cutting the sensitivity drift that drives nuisance duct alarms on other detectors. The magnet-activated test/dirty/reset switch works through the closed clear cover, so routine testing and troubleshooting never require opening the housing. One controller supports up to two detectors, and up to 15 controllers can interconnect for multi-fan shutdown on larger air handling jobs.

Key features

Under 2 in deep - drops into tight duct spaces other detectors can't reach
Self-compensating sensing: checks for dirt and humidity every 8 minutes and adjusts automatically
Test without opening the cover: magnet-activated test/dirty/reset switch
RJ45 interconnection for fast drop-in migration from other detectors
One controller, two detectors: supports remote or tandem-mounted sensor
Multi-fan shutdown: interconnect up to 15 controllers

System requirements

Air velocity rating 100 to 4,000 ft/min. Operates on 24 Vdc, 24 Vac, 120 Vac, or 230 Vac. Order an air sampling tube separately to match duct size; RJ45 wiring harnesses (5, 10, or 15 ft) available for remote-mounted sensors.

Specifications

SKU	KD-SD-4WJ
Brand	Kidde Commercial
Form factor	Controller with sensor (RJ45), tandem or remote mount
Detection method	Photoelectric, with differential environmental compensation
Air velocity rating	100 to 4,000 ft/min
Sensitivity	0.67 to 2.46% obscuration/ft
Operating voltage	24 Vdc, 24 Vac, 120 Vac, or 230 Vac
Operating temp	-4Â°F to 158Â°F (-20Â°C to 70Â°C)
Relays	1 alarm (2.0A @ 30 Vdc), 1 trouble (2.0A @ 30 Vdc), 2 auxiliary (10A @ 30 Vdc / 250 Vac)
Wiring distance	Detector to controller: 100 ft max; controller interconnect: up to 1,976 ft on 14 AWG
Dimensions	14.51 x 5.45 x 1.90 in (controller and detector, tandem-mounted)
Compliance	UL, ULC, CSFM, FM, MEA

Documents and resources

Spec SheetPDF

FAQs

Does the SD-4WJ include the air sampling tube?

No. The included exhaust tube is provided, but the air sampling tube is ordered separately (available in 8 to 120 inch lengths) to match the duct.

Can the sensor be mounted away from the controller?

Yes. One or both sensors can be installed remotely from the controller using an RJ45 wiring harness, available in 5, 10, or 15 ft lengths.

How is the detector tested?

With the included magnet-activated test/dirty/reset switch, or from a remote SD-TRM4 (magnetic) or SD-TRK4 (keyed) Remote Test/Reset Station, without opening the detector cover.

Can one controller support two detectors?

Yes. Each SD-4WJ controller supports up to two sensors, tandem-mounted or remote.