Bosch PLE-1MA060-US User Manual

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 | 17

4

Connections and settings

4.1 Connecting 

inputs

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 
be overruled.

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.

Note
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.