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Bosch Plena Voice Alarm System Service Manual Page 41

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Bosch Security Systems | 2004-06 | 9922 141 10371en
Plena Voice Alarm System | Installation and User Instructions | Installation en | 41
4.12.1 EMG contact
The EMG contact is activated on entering the
emergency state. The emergency state is entered when
the EMG button is pressed (see section 6.6) or when an
EMG trigger input is activated (see section 4.7.1).
4.12.2 Fault contact
The fault contact is activated on entering the fault state
(see section 7.1). The fault state is entered when a line
fault (see section 7.2.1) or a system fault (see section
7.2.2) occurs.
4.12.3 Call contact
The call contact is activated on entering the call state.
The call state is entered when:
• On one of the call stations the PTT button has been
pressed for making a business call (see section 6.5.2).
• An emergency (see section 4.7.1) or business trigger
(see section 4.7.2) input is activated.
• The EMG button on the controller has been pressed
for making an emergency or alert message (see
section 6.6.1).
4.13 Connecting EMG microphone
On the front of the controller there is one connector for
an emergency (EMG) microphone.
4.14 Connecting call stations
A call station (LBB1956/00) is connected to the
controller using a CAT-5 twisted pair RS-485 cable with
RJ45 connectors on each cable end. The controller has
two shielded RJ45 sockets allowing 2 call stations to be
directly connected to the controller. To connect more
call stations, use the two looped-through RJ45
connectors on a call station. Like this, in total, 8 call
stations can be part of a system. See figure 4.17 for
connection details.
If the cable between the call station and the voice alarm
controller is longer than 100 m, the call station must be
connected to a 24V(DC) power source. See figure 4.18
for connection details.
figure 4.16: Connecting the EMG microphone
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figure 4.17: Connecting call stations
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