1-Channel mode operation
If the 2ch operation switch (see 2-Channel mode operation, page 78) is in the OFF position,
the system operates in the 1‑channel mode.
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 External power amplifier, page 52). In 1‑channel mode, all calls will
interrupt the BGM.
Amplifier Function
Internal BGM/Call power amplifier.
External Not connected/Spare power amplifier.
Table 6.2: 1-channel mode, voice alarm 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 External power amplifiers, page 67). In 1‑channel mode:
– External power amplifier 1 of the voice alarm router is used to increase the power for
calls and BGM, that go via the internal power amplifier of the voice alarm controller.
– External power amplifier 2 of the voice alarm router is used for spare-switching.
Amplifier
Function
1 BGM/Call power amplifier.
2 Not connected/Spare power amplifier.
Table 6.3: 1-channel mode, voice alarm router
6.1.4
Plena Configuration | en 77
Bosch Security Systems B.V. Installation and Operation manual 2013.07 | V2.0 |
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