Kidde | SuperDuct Four-Wire Duct Smoke Detector Controller with Terminal Connections | SD-CT

The Kidde SD-CT is the controller module for the SuperDuct four-wire duct smoke detector system, wired via terminal block connections. It accepts 24 VDC, 24 VAC, 120 VAC, or 220/240 VAC input, so it drops into virtually any commercial HVAC monitoring setup without a separate power supply conversion.

Built for the commercial installer

Each controller supports up to two SuperDuct detectors and provides one alarm relay, two 10A Form C auxiliary relays, and one supervision relay for FACP integration and fan shutdown. Interconnect up to 15 controllers to coordinate multi-zone HVAC shutdown from a single alarm event. UL Listed (268A), ULC, CSFM, and FM approved.

Key features

• Multi-voltage input: 24 VDC, 24 VAC, 120 VAC, or 220/240 VAC - no external transformer needed for most installs
• Supports two detectors per controller for flexible duct monitoring coverage
• Two 10A Form C auxiliary relays for direct fan shutdown or damper control without an intermediary relay
• Interconnect up to 15 controllers for coordinated multi-zone HVAC shutdown
• Clear polycarbonate cover with visible Power, Trouble, and Alarm LEDs for at-a-glance status
• Terminal block connections for standard wire-in installation (#14-#22 AWG)

System requirements

Pairs with Kidde SuperDuct four-wire duct smoke detectors (SD series). Mounts independently or inside the duct detector housing. Requires connection to a compatible FACP via the alarm and supervision relay contacts.