Plena Mixer Amplifier Installation and User Instructions Connections and settings

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4.1.4Emergency inputs

The Tel. emergency/70V input, with VOX functionality, is used for receiving emergency announcements or signals (such as a fire alarm). This input has absolute priority, and will overrule all inputs when an emergency announcement or signal is received.

Either a telephone line or a 70 V input signal can be connected to the Euro style pluggable screw terminal connector (1) at the rear of the unit. See section 4.1.4.1 and section 4.1.4.2.

Caution

Never connect telephone lines and a 70 V signal to the Euro style connector at the same time.

To adjust the volume of the emergency announcement or signal, turn the rotary dial (2) at the rear of the unit. For safety reasons, the volume of the emergency announcement or signal cannot be set to zero.

The master volume control setting (5) does not influence the volume setting of the emergency announcement or signal.

Note

Tel. emergency input does not mute the incoming signal so that an incoming pilot tone will be fed to the zone outputs. With this feature it is possible to use the mixer amplifier in a Bosch Voice Alarm System when using end of line boards (PLN-1EOL).

The signal that is delivered to the unit should be quiet when a call is not made. The pilot tone and frequencies below 300 Hz are filtered from the trigger signal so that the input will not trigger from a pilot tone or low frequency rumble.

4.1.4.1Connecting 70 Volt input signal

Connect the 70 Volt input signal as shown in figure 4.3.

figure 4.3: Connecting 70 Volt input signal

Bosch Security Systems 2007-12 PLE-1MA030-US, PLE-1MA060-US, PLE-1MA120-US en

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Bosch Appliances PLE 1MA030-US, PLE-1MA120-US, PLE-1MA060-US manual Emergency inputs, Connecting 70 Volt input signal

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