The Siemens OH121 is a spot-type detector head used within Siemens Cerberus PRO and FireFinder XLS intelligent fire alarm systems, with backward compatibility into MXL legacy infrastructure, providing initiation input to the addressable or conventional circuit it is wired into. Confirm the exact sensing technology and listing of the specific build before specifying.

Compliance

• UL 268 smoke detectors for fire alarm systems
• UL 864 control unit listing when connected to a listed circuit
• NFPA 72 application

Key features

• Spot-type detection head for fire alarm initiation
• Mounts to a compatible Siemens detector base
• Reports the detected condition to the host control unit
• Restorable after the alarm condition clears
• Field-serviceable head-and-base assembly
• Compatible within Cerberus PRO / FireFinder XLS / MXL legacy systems

Spot-type detection devices monitor the protected area for products of combustion and report the condition to the control unit so notification and ancillary functions can be initiated. Pair the head with a listed base and confirm the addressing scheme of the host system.

Verify panel/device family compatibility before ordering.