Detnov CAD-150-8 Manual Del Instalador página 21

The cable supplied with the unit must be connected so that the positive terminal of one
battery is connected with the negative terminal of the other.
The batteries are placed in the bottom of the box, vertically in the space provided.
Connect the wires from the circuit (red and black) to the unused positive and negative
terminals of the two batteries.
2.6- Loop connection
The facility should be closed loop, ie the two-wire shielded cable should come out of the
panel and return to it, this cable will connect all devices in the system.
GB
The cable used must be at least 1.5 mm , braided shield should be used to avoid
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interference. The maximum length of the loop cable is 2 Km. The resistance of the loop
must be less than 44 Ohms, and the maximum capacity of the line should be less than
500 nF.
Connect the loop output cables at the connector marked S + & S-, and the screen to the
terminal indicated as , and the return of the loop at the connector marked R + and R-,
and the screen returns to terminal indicated as . It is essential to have a continuous
screen on each loop.
Some of the modules require external power, which can be derived from the auxiliary
output on the motherboard (do not connect more than 10 modules), or an auxiliary
source, located as close as possible to the module.
For more information see the installation manual of each module.
2.7- Sounder connection
The panel has 2 sounder outputs, listed in the motherboard as SN1 and SN2. Each
monitored output can power conventional sounders with a total consumption of 500 mA.
It is imperative that the sounders are polarized, or else it is necessary to insert a diode
to prevent the sounders from activating in the quiescent condition. A 4K7 end-of-line
resistor is required.
When using sounders or bells which are not polarized, you must install a type 1N4007
diode to prevent reverse current effect.
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