Dynacord DPA 8150, User Manual

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Power switch
The POWER switch at the rear separates the output stage from the power supply when the
switch is in the OFF position. The output stage starts booting up when the switch is in the ON
position. A soft-start circuit avoids any in-rush current peaks occurring during this process.
The speakers are switched on via the output relays after a time delay. This effectively
suppresses any audible in-rush noises.
DC input
The DPA output stage automatically switches to DC input in the event of failure of the mains
supply voltage. For this input, connect a 24-volt DC source to the DC INPUT input. The scope
of delivery for the device includes a 2-pin connector. Conductor cross-sections of 0.2 mm²
(AWG24) to 6 mm² (AWG10) can be used. Recommended connecting cable: flexible CU
strand, LiY, 4 mm². The DC input is protected against incorrect polarity and overload. The
associated fuse is located on the inside of the amplifier and is not accessible from outside of
the device.
Notice!
The DC input cannot be switched off. The power switch can only be used to switch off the
mains power supply.
End of line (EOL)
End-of-line (EOL) technology enables the speaker lines to be monitored for short-circuit and
interruptions.
Notice!
EOL monitoring can only be performed on devices with a serial number above 20,000.
Method of operation
An EOL slave module (PDC-121967) is installed at the end of the speaker line. The speaker
line is used for both the power supply of the module (via the
non-audible pilot tone) and for bi-directional communication between the EOL master in the
output stage and the EOL slave module (using very low-frequency signals).
If a communication error occurs – for example, if the EOL master does not receive a response
from the slave – then an error message is generated. The unique addressing of the slave
modules means that multiple slave modules can be connected to one speaker line.
6.6
PROMATRIX 8000 POWER AMPLIFIER Safety information | en 23
User manual 19-Aug-13 | 03 | F01U217494