Siemens OOHC941 multi-criteria fire and CO detector for intelligent addressable systems.

Compliance

• UL 268 (7th edition)
• UL 268A
• UL 521
• UL 2075
• NFPA 72
• NFPA 76
• FM Approved
• CSFM
• RoHS compliant

Key features

• Combines optical/thermal smoke, heat, and CO gas sensing in a single addressable device on one SLC address
• ASAtechnology forward/backward light-scattering algorithm reduces nuisance alarms from dust, steam, and cooking aerosols
• ISOtechnology True Class-X SLC isolation supports up to 252 isolation-ready devices per loop
• Field-programmable as VEWFD per NFPA 76 with 0.2%/ft pre-alarm and 1.0%/ft alarm thresholds
• Five selectable fixed-temperature settings and four rate-of-rise options for flexible heat detection

The OOHC941 is a two-wire addressable multi-criteria detector within the Siemens Cerberus PRO and FireFinder XLS platforms. Its ASA-patented neural network algorithm processes optical and thermal signals simultaneously, distinguishing verified fire signatures from deceptive phenomena. The electrochemical CO sensor meets UL 2075 for life-safety gas detection, making the unit suitable for mixed occupancy applications where both fire and CO monitoring are required. Standby current is 0.75 mA; operating range is 32–120°F at 0–95% relative humidity.

Verify panel/device family compatibility before ordering.