Manufacturer: Tyco Fire and Security GmbH “Fire Alarm System – Smoke Sensors
Optical smoke and heat detector 851PH, EN54-5 P, EN54-7,
EN54-17:2005, VDS2806 CEA4021, Uses :MX Digital
Protocol” TYCO.851PH.516.850.055
Manufacturer: Tyco Fire and Security GmbH “Fire Alarm System – Isolator Base
* 5BI 5″” Isolator Base for Optical smoke and heat detector 851PH, 0786-CPD-20762″ TYCO.851PH.517.050.018