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Plena Message Manager | Installation and Operating Manual |
active, this announcement will start again from the beginning. Non-repeating single-shot announcements are just
cancelled without finishing.
4.3 Monitoring
The message manager comprises a 6.3 mm headphone output socket (2) with a momentary monitor pushbutton (3).
When the unit is not active it is possible to select messages for monitoring. Note that memory supervision
(checksum) is disabled during monitoring.
If during monitoring any trigger input contact for starting an announcement is made, the monitoring process is
cancelled immediately and the normal play-back mode is resumed.
To select messages for monitoring simply press the momentary monitor pushbutton. A single push starts message
#1. If the pushbutton remains pressed, message #2 will be played automatically upon completion of message #1, #3
after #2, etc., up to and including the last available message. Then it stops.
If during play-back of a message the monitor pushbutton is repeatedly pressed, the next message is started without
finishing the previous one. During this monitoring process the corresponding message indicator LEDs are flashing.
Running messages, triggered manually or started via the trigger contacts, can be heard on the monitor headphone as
well. There is no monitor volume control.
4.4 Supervision
In conformity with the major standards for emergency sound systems like IEC 60849, the following features of the
message manager are or can be supervised:
-
Content of the message memory. The micro controller adds a checksum to the messages. This supervision
requires no user intervention. If no messages are played the processor will read out the complete audio mem-
ory to compare its content to the checksum, automatically and continuously within a 100 s cycle.
-
Availability of any message in the audio memory.
-
Presence of mains supply.
-
Trigger contacts and involved wiring of trigger inputs 1 to 6 (see also §1.4).
-
Resetting of the internal processors by the 'watchdog' circuitry. The processors have a watchdog circuit to
reset the processor if the normal program flow is halted or deviated from.
-
Supervision of the DAC using a 1 Hz pilot tone.
-
Supervision of audio connections using a 20 kHz pilot tone.
If during supervision a fault is pointed out, the fault indicator LED (6) will light up and the internal fault relay, which
is normally activated when the power supply is connected and the unit is ON, will be switched to its unpowered
state.
Potential free fault contacts (SPDT) and potential free message active relay contacts are provided at the rear of the
unit.
4.5 Manual editing of messages
The program mode pushbutton (4) can be used to manually change the message sequence of trigger inputs 7 to 12
and the corresponding zone set-up. Manual editing is not possible for the trigger inputs 1 to 6; these input
configurations must be uploaded from the PC to avoid abuse.
Manual editing of trigger inputs is done as follows:
•
Press the program mode pushbutton (4) and keep it depressed for more than 3 s. The program mode indicator
LED (5) will light up to indicate that the message manager is in the program mode.
Bosch Security Systems | 2003-09 | 9922 141 50502en
Operation
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