Wiring connections for an addressable smoke and heat detector show incoming data lines from the previous addressable device or control panel connected to terminal one for data in negative and terminal two for data in positive. Outgoing data lines continue to the next addressable device or return to the control panel from data out negative and data out positive terminals.
3 2 1 TO NEXT ADDRESSABLE DEVICE OR RETURN TO CONTROL PANEL FROM PREVIOUS ADDRESSABLE DEVICE OR CONTROL PANLE DATA IN (-) TERMINAL 1 DATA OUT (-) DATA IN (+) TERMINAL 2 DATA OUT (+)
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