Shop Wired Interface Modules at GeoArm Security. Explore a wide selection of hardwired fire alarm interface modules from trusted manufacturers, including System Sensor, Honeywell, and other leading life-safety brands. Browse two-wire, four-wire, smoke, carbon monoxide, relay, polarity-reversal, synchronization, and detector-integration modules designed to connect compatible life-safety devices with residential and commercial fire alarm control panels. Protect your home or business with dependable fire alarm interface modules and flexible GeoArm 24/7 professional UL-listed central station fire alarm monitoring with no long-term contracts.