Bosch Plena Voice Alarm System - 5.1.7 Volume overrides

Plena Voice Alarm System Connection | en 49
Bosch Security Systems B.V. Installation and Operation manual 9922 141 1037x (V2.16) | V0.6 | 2011.09
5.1.7 Volume overrides
The voice alarm controller has 6 override outputs; 1 for each zone in the system (see
Figure 5.7). These are suitable for 4-wire override (24 V) and 3-wire override.
Figure 5.7 Override outputs
Internally, the positive override pins (Z+) are all connected to either the NC or the NO contact
of the Volume Override output (see Figure 5.8). The negative override pins (Z-) are all
connected to earth.
Figure 5.8 Volume override contacts
NOTICE!
By default, the voice alarm controller is configured for 4-wire (24 V), power-saving override,
see situation I in Figure 5.9.
COM
NC
NO
NC
TRG2
Override/Trigger Output
TRG 1
24V
EMG
Fault
Call
Z1
Z2
Z3
Z4
Z5
Z6
NC
COM
NO
NC
COM
NO
NC
COM
NO
NO
24V
Volume Override
Z1
+
_
Z2
+
_
Z3
+
_
Z4
+
_
Z5
+
_
Z6
+
_
NO NC