The Siemens Fdbz-Rtl Remote Alarm Indicator Works With The Fdbz492-R Or Fdbz492-Pr Air Duct Housing With Relays. The Led On The Remote Indicator Mimics The Color Of The Led On The Detector. Use The Remote Indicator In Applications Where The Detector Is Not Easily Viewed, Such As Air Ducts And Drop Ceilings. The Siemens Fdbz-Rtl Also Works With Fdbz492-Hr To Monitor And Test Its Relay Output. Also, Its Led Will Indicate If The Relay Is In Standby (Grn) Or Alarm (Red) State.&Amp;Nbsp,
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