Siemens OH921 addressable heat detector for commercial fire alarm systems.

Compliance

• UL 268
• UL 268A
• UL 521
• NFPA 72
• FM Approved
• CSFM
• RoHS compliant

Key features

• Operating voltage 16–30 VDC for compatibility across Siemens addressable panel families
• Operating temperature range 32–100°F suitable for standard commercial occupancies
• Humidity tolerance 0–95% for reliable detection in varied environments
• Lightweight at 0.317 lbs for easy ceiling or wall mounting on standard detector bases
• Connects to Cerberus PRO and FireFinder XLS signal line circuits as a single addressable point

The OH921 is a Siemens addressable heat detector that integrates with Cerberus PRO and FireFinder XLS fire alarm control panels. It provides fixed-temperature and rate-of-rise thermal detection and is suitable for commercial, institutional, and industrial buildings where reliable heat sensing is required. The detector mounts on standard Siemens DB-series bases and communicates alarm and supervisory status to the panel via the signal line circuit.

Verify panel/device family compatibility before ordering.