System Sensor CO1224TR 4-Wire CO Detector with Form C Relay
Overview
The CO1224TR is a 4-wire carbon monoxide detector designed to integrate into fire alarm control panels and building automation systems. Operating at 24VDC, the detector uses an electrochemical sensing cell to identify dangerous CO levels and outputs a Form C relay contact for dry-contact alarm signaling. The single-gang back box mount fits standard electrical enclosure installations. This model includes a 10-year end-of-life timer and RealTest functional test capability, reducing commissioning time on addressable and conventional fire loops.
Compatibility
The CO1224TR integrates with fire alarm control panels and security systems that accept 4-wire CO detector inputs with Form C relay outputs. The 24VDC power requirement and low current draw make it suitable for panels with limited power budgets. The Form C relay contact allows direct wiring to alarm signaling circuits without intermediate modules. Typical applications include HVAC systems, parking structures, kitchens, commercial garages, and multi-tenant residential buildings where building code requires CO monitoring with automated alert and central station reporting.
Installation Notes
Mount the CO1224TR in a single-gang electrical back box. Operating temperature range is 0°–40°C (32°–104°F). The detector uses SEMS-type terminal Phillips head screws for positive wiring connections and code-required wiring supervision. The Form C relay contact is rated 10A @ 125/250VAC for alarm signal switching. Verify panel compatibility with the detector's 24VDC polarity before installation. The end-of-life timer signals panel trouble at 10 years; schedule replacement accordingly to maintain UL listing compliance.
