Product Details
The Siemens OP921 Photoelectric Smoke Detector is a plug-in, two-wire, addressable, photoelectric smoke detector compatible for use with Siemens Model ‘H’-series devices on the same loop with Cerberus PRO fire-alarm control panels or FireFinder XLS FACPs.
Programmable. Compatible with Model 8720 / DPU (device programmer / loop tester)
Suitable for use in air-duct housings models FDBZ492 and FDBZ492-HR.