Sensaphone CELL682 - Manual (Page 24)

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Cell682 User’s Manual
Figure 6: Sensor connected to a dry contact input]
Any N.O. or N.C. sensor can be attached to the Cell682 using 18–24 gauge wire.
For distances of 1000’ or more, use heavier gauge wire. When running wire out-
doors it is recommended that shielded cable be used. Connect the shield to a good
earth ground or metallic cold water pipe. The total resistance of the circuit cannot
be greater than 100 ohms. Use wire appropriate for the application. See the wire
length recommendations, later in this chapter.
The Cell682 may have more than one sensor connected to the same terminal,
however, the normal condition for each sensor on the same terminal must be iden-
tical (either all N.O. or all N.C.).
NormaLLy CLosed seNsors
To wire more than one normally closed sensor on one input, they must be con-
nected in series. Connect a lead from the first sensor to one of the Dry Contact
Inputs on the terminal strip. Next, take the other lead from the first sensor and
connect it to one lead from the next sensor. Continue connecting sensors end-to-
end until you have connected all of your sensors. Take the second lead from your
last sensor and connect it to the ground screw on the Cell682 terminal strip. See
Figure 7.
Multiple N.C. inputs are typically magnetic reed switches to monitor the security
of windows and doors.