Supervision; Channel And 2 Channel Operation - Bosch Plena Installation And User Instructions Manual

Plena Voice Alarm System | Installation and User Instructions | Configuration
17.4

Supervision

If the Supervision switch (see figure 17.1) is in the ON
position, supervision is enabled. If it is in the OFF
position, supervision is disabled. See chapter 18 for
more information about supervision.
17.5 1 channel and 2 channel
operation
17.5.1 Introduction
If the 2ch operation switch (see figure 17.1) is in the ON
position, the system operates in the 2-channel mode. If
the 2ch operation switch is in the OFF position, the
system operates in the 1-channel mode.
17.5.2 1-channel mode
17.5.2. 1 Voice alarm controller
In the 1-channel mode, all calls and BGM are amplified
by the internal power amplifier of the voice alarm
controller. If desired, an external power amplifier can
be connected for spare switching (see section 5.3.4). In
1-channel mode, all calls will interrupt the BGM.
table 17.2: 1-channel mode, voice alarm controller
Amplifier Function
Internal BGM/Call power amplifier
External Not connected/Spare power amplifier
17.5.2.2 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 5.3.4). In 1-channel mode:
• External power amplifier 1 of the voice alarm router
is used to help the internal power amplifier of the
voice alarm controller to amplify calls and BGM.
• External power amplifier 2 of the voice alarm router
is used for spare-switching.
table 17.3: 1-channel mode, voice alarm router
Amplifier Function
1 BGM/Call power amplifier
2 Not connected/Spare power amplifier
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17.5.3 2-channel mode
17.5.3. 1 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 5.3.4). 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 17.4: 2-channel mode. controller
Amplifier Function
Internal BGM/Spare power amplifier
External Call power amplifier
17.5.3.2 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 5.3.4). In 2-channel mode:
• External power amplifier 1 of the voice alarm router
is used to help 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 17.5: 2-channel mode, router
Amplifier Function
1 BGM/Spare power amplifier
2 Call power amplifier
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