Plena Voice Alarm System Configuration | en 67
Bosch Security Systems B.V. Installation and Operation manual 9922 141 1037x (V2.16) | V0.6 | 2011.09
6.1.5 2-Channel mode operation
If the 2ch operation switch (see Figure 6.1) is in the ON position, the system operates in the 2-
channel mode.
Voice alarm controller
In the 2-channel mode, the BGM is amplified by the internal power amplifier of the voice alarm
controller. The calls are amplified by the external power amplifier, which is connected to the
voice alarm controller (see section 5.1.4 ). If the external power amplifier is faulty, the calls
are amplified by the internal power amplifier. In 2-channel mode, calls do not interrupt the
BGM.
Table 6.4 2-channel mode, controller
Voice alarm router
One or two external power amplifiers can be connected to a voice alarm router to increase the
power of the system (see section 5.2.5 ). In 2-channel mode:
– External power amplifier 1 of the voice alarm router is used to increase the power of the
internal power amplifier of the voice alarm controller.
– External power amplifier 2 of the voice alarm router is used to help the external power
amplifier of the voice alarm controller to amplify calls.
Table 6.5 2-channel mode, router
6.2 Supervision
If the Supervision switch (see Figure 6.1) is in the ON position, supervision is enabled. If it is
in the OFF position, supervision is disabled.
If the Supervision switch is in the OFF position, the Disabled indicator on the front panel of
the voice alarm controller is lit (see Figure 6.2) to indicate that supervision is switched off.
Figure 6.2 Disabled indicator
Amplifier Function
Internal BGM/Spare power amplifier.
External Call power amplifier.
Amplifier Function
1 BGM/Spare power amplifier.
2 Call power amplifier.
NOTICE!
Supervision is only necessary for systems that have to comply to the IEC60849 evacuation
standard. If the system does not have to comply to this standard, leave the switch in the OFF
position.
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