Dynacord DPA 8150, Руководство пользователя

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Whenever a fault occurs in the DPA output stage, this is always indicated by means of the red
FAULT LED lighting up and the READY relay switching to “Not ready”. IRIS-net can be used to
configure which DPA output stage fault types are to be displayed. The monitoring of functions
that are not being used (e.g. DC input) must be deactivated, otherwise a permanent fault is
displayed.
Ground fault monitoring
The VDE specification DIN VDE 0800 must be observed when setting up and operating 100-volt
speaker systems. Particularly with 100-volt speaker systems that are used for alarm purposes,
all protective measures must be designed for measuring class 3. The integrated ground fault
monitoring function in the DPA output stage allows the insulation of the ungrounded speaker
line network to be monitored. Any ground fault that occurs is an indication of either cable
damage, which means that a line interruption may occur in the near future, or a wiring fault,
which can result in malfunctions. A ground fault that has been present for at least five seconds
is indicated on the front panel by the GROUND LED lighting up red. The GROUND LED lights
up until the power supply to the output stage is disconnected or the error is reset by pressing
the FAULT button or using IRIS-Net.
Function testing
To test the ground fault monitoring function, use a 47-kOhm resistor (the DPA output stage
must not be in STANDBY mode during the testing process). If, with the relay closed at the
output, the resistance is switched from a terminal of the OUT power output terminals to
protective ground for approx. five seconds, the GROUND LED must light up and the READY
malfunction indicator relay must switch to “Not ready”. If the resistance is greater than
100 kOhms and the capacity is less than 5 μF, the GROUND LED must not light up. After the
resistor has been removed, the display and the malfunction message must continue to be
shown. To reset the ground fault monitoring function, press the FAULT button or use IRIS-Net.
Pilot tone monitoring
Each audio input on the DPA output stage has a pilot tone monitoring function. To perform
this function, the DPM 8016 feeds a permanent pilot tone signal to the audio connection for
the DPA output stage. In the DPA output stage, the level of the pilot tone is compared with a
threshold value. If the threshold value is not reached for a specific period of time, then an
error message is generated. The properties of the pilot tone generator in the DPM (AO-1 card,
frequency, and level) and the properties of the pilot tone monitoring function in the DPA
output stage (level and duration of the interruption) can be configured in IRIS-Net. In general,
the default values must be used.
Resetting to factory default settings
The DPA output stages are programmed in the factory with the following functions and
properties:
Parameter Setting/description
CAN baud rate 10 kbit/s
Input routing To the direct inputs (IN)
Output relays All closed
Output level 0 dB
Internal pilot tone generator Off
Table 8.1: DPA output stage factory default settings
The DPA output stage settings can be reset to the default values manually or using IRIS-Net.
To perform a manual reset, perform the following steps with the output stage switched on:
32 en | Safety information PROMATRIX 8000 POWER AMPLIFIER
19-Aug-13 | 03 | F01U217494 User manual