Bosch PLE 1MA030-US User Manual

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Bosch Security Systems | 2007-12 | PLE-1MA030-US,  PLE-1MA060-US, PLE-1MA120-US en
Plena Mixer Amplifier | Installation and User Instructions | Connections and settings
 en | 19
4.1.4
Emergency 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.
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.
4.1.4.1
Connecting 70 Volt input signal
Connect the 70 Volt input signal as shown in 
figure 4.3.
Caution
Never connect telephone lines and a 70 V signal 
to the Euro style connector at the same time.
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.
figure 4.3: Connecting 70 Volt input signal