Kidde SM120X Relay Module for I-Combo Units, Smoke Alarms

Extend smoke alarm notifications across a building with the Kidde Residential SM120X Relay Module — a compact relay designed to translate interconnect smoke signals into actionable outputs for auxiliary warning and lighting systems. As a dedicated relay module for I-Combo and interconnected smoke alarms, the SM120X only activates on a smoke alarm interconnect signal, giving you dependable, coordinated notification across emergency and security systems. The unit provides isolated normally open and normally closed contacts (no internal 120 VAC connection) and a robust contact rating of 10 A @ 120 VAC, so you can power horns, strobes, sirens or emergency corridor lighting without risking the main alarm circuit. The module operates on 120V AC (60 Hz, 0.08 A) and includes a limited DC output (5 mA) for simple accessory connections; it also supports spot-type heat detectors and manual pull stations. Ideal for property managers, integrators and security professionals, the SM120X integrates seamlessly into fire, security and monitoring setups to expand alarm coverage and improve occupant safety. Add the SM120X to your fire and security strategy today — order or specify it for your next building safety upgrade.

• Extend alarm coverage: activates external bells, sirens or emergency lighting to push smoke alerts beyond individual detectors
• Interconnect-only activation: responds only to smoke alarm interconnect signals to reduce nuisance triggers and ensure coordinated notifications
• Isolated contacts for safe integration: no internal connection to 120 VAC, protecting connected security and building systems
• Reliable switching capacity: supports up to 10 A at 120 VAC to drive auxiliary warning devices and stair/hallway lighting
• Flexible inputs: powers spot-type heat detectors and manual pull stations for comprehensive fire monitoring and control