Bosch Appliances Car Amplifier PLE-2MA120-EU User Manual

Bosch Security Systems | 2007-10 | PLE-2MA120-EU,  PLE-2MA240-EU en

Plena Mixer Amplifier | Installation and User Instructions | Connections and settings

 en | 16

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 (4) at 
the rear of the unit. Microphone/line 1 input has 
priority over all other microphone/line inputs.

If, however, the “Tel. emergency/100V input” receives a 
signal, all inputs including microphone/line 1 input will 
be overruled.

The microphone/line 1 input has two connectors wired 
in parallel: 
•

an XLR connector (for a 3 pole microphone), and

•

a Euro style pluggable screw terminal connector.

The Euro style pluggable screw terminal connector has 
a trigger input, which can be used in combination with 
the Euro and XLR connector.

The priority microphone can be connected to the 
microphone/line 1 input as follows:
•

XLR connector only. See figure 4.2.

•

XLR connector with trigger. See figure 4.3.

•

Euro connector with trigger. See figure 4.4.

•

Euro connector only (without trigger).

 

Set the DIP switch settings next to the XLR connector 
for microphone/line 1, as required. See section 4.3.

Note
If a microphone is connected to both the 

XLR connector and the Euro connector for the 

microphone/line 1 input, the input signals will be 

added together.

Note
When connecting an unbalanced line level 

(200 mV) signal to the microphone/line input, 

connect it as follows: Signal to pin 2, pin 1 and 

pin 3 to ground.