Shop DSC Wired Interface Modules at GeoArm Security. Browse DSC-Compatible System Sensor i4 hardwired 2-wire and 4-wire interface modules for compatible smoke and carbon monoxide detectors. These modules connect compatible life-safety detectors to an alarm control panel, allowing separate smoke and CO alarm signals, system status supervision, and detector maintenance signaling. DSC-Compatible security systems support GeoArm 24/7 professional UL-listed central station monitoring or DIY self-monitoring with no long-term contract.