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Bosch Security Systems | 2011-02
Praesideo 3.5 | Installation and User Instructions | 4 | Amplifiers en | 186
11.3.2 Supervision-slave For a correct operation of the supervision, it is
important that the loudspeaker line has the
characteristics that are listed in section 11.5.5. Also, the
minimum total loudspeaker impedance at 70 kHz is
important. This impedance depends on the quality of
the transformer in the loudspeaker and the number of
loudspeakers in the line. The loudspeakers of Bosch
Security Systems are designed with this impedance
criterion in mind.
Proceed as follows to install the supervision-slave in the
loudspeaker line:
1 Use the holes in the supervision-slave (see figure
11.5) to install it in a loudspeaker. The coils on the
supervision-slave PCB must be kept at a distance of
30 mm or more from the loudspeaker magnet and a
distance of 50 mm or more from the loudspeaker
transformer, otherwise the magnetic fields can
disturb the correct operation of the supervision-slave.
2 Connect the loudspeaker line signal to the
supervision-slave PCB (see section 11.2.2).
Warning
To prevent the hazard of electric shocks, switch
the power amplifier and the back-up power
supplies off, before starting installing the
supervision-slave.
To reduce the risk of electric shock do not
perform any servicing other than that contained
in the operating instructions unless you are
qualified to do so. See section 1.2 Intended
audience.
Warning
The supervision-slave is susceptible to
electrostatic discharges. Wear an anti-ESD
bracelet during the installation of the
supervision-slave.
figure 11.5: Supervision-slave PCB dimensions
80
40
70
5
1040
50
60
3.1
5