This module is only activated by a smoke alarm interconnect signal. The relay portion of this module can be used to activate auxiliary warning devices such as external bells and sirens, hallway or stairwell lighting. It provides isolated, (no internal connection to 120 volts AC) normally open, and normally closed contacts. The power supply portion can be used to connect spot type heat detectors (Rate of rise or combined rate of rise and fixed temperature only), flow switches and manual pull stations with interconnected multiple station alarms. This product WILL NOT activate a CO Alarm