English
Indoor sirens are usually connected with two wires; after being connected to a 12V power supply, they generate a very strong signal (over 110 dB). The siren is usually mounted on the ceiling, in a less accessible place.
The following example shows the connection of the SA-913 T internal siren to the CP-1000 basic module with a standard power supply with a backup - the PS2-60/27 power supply and 2 x 12 V batteries.
The siren is triggered by the DO1 relay output; any relay output of the CFox and RFox modules can be used; however, you should ensure that the module switching the power supply to the siren has also a backup battery, i.e. it should be functional even during a power failure.
The TAMPER (the sabotage contact of the siren housing) in the example is connected as a standard NC contact to the DI1 input. If you want to evaluate the loop as balanced (here it is single balanced), you should use a different DI system input, which supports balanced inputs (e.g. the C-IB-1800M module input), or you can also use the input to CP 1000, which should be measured as AI; a 1 kΩ resistor should be connected in series to the loop, and the loop resistance should be measured and the measurement will be processed in the user programme.
Fig. 1. An example of connecting an internal siren SA-913T to the CP-1000 powered by the PS2-60/27 power supply