Plena Mixer Amplifier | Installation and User Instructions | Connections and settings
Connections and settings
Priority microphone (input 1)
The priority microphone (or a generic call station) that
can be used with push to talk (PTT) should be
connected to "microphone/line 1 input". The PTT
mode can be activated by setting the DIP switch (11) at
the rear of the unit. Microphone/line 1 input has
priority over all other microphone/line inputs.
If, however, the "Tel. emergency/70V input" receives a
signal, all inputs including microphone/line 1 input will
The microphone/line 1 input has a Euro style pluggable
screw terminal connector. This Euro style pluggable
screw terminal connector has a trigger input, which can
be used in combination with the Euro connector.
The priority microphone can be connected to the
microphone/line 1 input with trigger as follows:
Euro connector with trigger. See figure 4.1.
Euro connector only (without trigger).
Set the DIP switch settings for microphone/line 1 with
trigger, as required. See section 4.3.
When connecting an unbalanced line level
(200 mV) signal to the microphone/line input,
connect it as follows: Signal to +, connect to -
and GND to ground.
Bosch Security Systems | 2007-12 | PLE-1MA030-US, PLE-1MA060-US, PLE-1MA120-US en
figure 4. 1 : Euro connector with trigger
en | 17