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Thorn Grinnell TFX Auto Call Fire Alarm MAIN PROCESSOR BOARD 940500 UPGRADED

horn~TFX~AutoCall~Grinnell~Simplex 

Fire Alarm System
Main Processor Board  
Model MP
Part Number  940500
 DC/DC   AC/AC
Side 1   125-065-755
Side 2   125-485-847​

With Upgrade
Board has a tag marking it as having
Version 10 Firmware




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