Plena Voice Alarm System Configuration | en 69
Bosch Security Systems B.V. Installation and Operation manual 9922 141 1037x (V2.16) | V0.6 | 2011.09
6.2.5 Emergency trigger inputs
If supervision is enabled and input supervision is switched on (see section 6.2 ), the system
can supervise the emergency trigger inputs. For each emergency trigger input, supervision can
be switched on and off with the configuration software.
6.2.6 Mains power
If supervision is enabled and mains power supervision is switched on (see section 6.2 ), the
availability of the mains power is supervised.
6.2.7 Battery
If supervision is enabled and battery supervision is switched on (see section 6.2 ), the
availability of the back-up power is supervised.
6.2.8 Message supervision
If supervision is enabled and message supervision is switched on (see section 6.2 ), the
internal message manager of the voice alarm controller is supervised. This message
supervision consists of supervision of the wave player using a check-sum and supervision of
the audio path using a pilot tone.
6.2.9 Emergency microphone
If supervision is enabled and emergency microphone supervision is switched on (see section
6.2 ), the audio path and the PTT switch of the emergency microphone are monitored from
the capsule to the connection with the voice alarm controller.
6.2.10 Line supervision
If supervision is enabled and line supervision (see section 6.2 ) is switched on, all loudspeaker
lines are supervised. Line supervision consists of:
– Impedance supervision.
– Short-to-ground supervision.
Impedance supervision
If line supervision is switched on, the voice alarm controller measures the impedance of all
loudspeaker lines once every 90 seconds (default value). The reference values for impedance
supervision are stored in the voice alarm controller during the system calibration (see section
7.1.3 ). If a difference of > 15% (default value) is detected between the measured line
impedance and its reference value, the line is considered faulty. The default values can be
changed with the configuration software.
NOTICE!
See the Configuration Software Manual (9922 141 1038x) for more information about the
configuration software.
NOTICE!
A small click can be heard at the start and end of an impedance measurement. If the click is
unacceptable, then end of line supervision with EOL can be considered instead of impedance
supervision.
NOTICE!
See the Configuration Software Manual (9922 141 1038x) for more information about the
configuration software.
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