DAX200/DAX400 – Installation Guide
Issue: 02 complete, approved
Page 10 of 28
25.
Ensure that the power to the unit is
disconnected.
•
Ensure that the mains and battery
isolator switches are in the off
position.
•
Ensure that the mains supply to the
unit is isolated.
26.
Ensure that the DAU is powered down.
27.
Connect all speaker lines to the terminal
blocks. Refer to Section “
2 Connections
”
(page
14
) for pinout details.
L
Before connecting the speaker lines to the
DAX it is advisable to check the speaker
lines to confirm that:
•
the expected number of End of Line
resistors is attached, and the A and B
circuits are evenly loaded;
•
the impedance is as expected and
does not exceed the capability of the
associated amplifier configuration;
•
all speaker lines are isolated from
earth.
Ensure adequately rated cables are used
for power supply and loudspeaker
connections, and route interlinking cables
away from power and loudspeaker
cables.
Wago Cage Clamp Connection
Use one of the two methods shown in the diagram
below to terminate the 100 V power speaker
cabling in the Wago connectors.
When the screwdriver is removed, the bare end of
the wire will be held securely by the contact
spring. To remove the wire, reverse the process.
28.
Connect the Electronics Module’s ribbon
cable and the field wiring to the DIN rail
Interlink Adaptor; see
Figure 13
.
The top edge of the chassis plate has
provision for earthing bars for terminating
the incoming cable drain wires.
For EMC compliance; see
Figure 12
:
•
Connect the cable screen of ALL
external cabling to one of these
earthing bars.
•
All screen tails to be < 3 cm.
The DAU can one or more Expansion
Amplifier Units, which are daisy-chained
to the DAU through the Audio-CAN bus;
see
Figure 19
(page
17
).
The ends of the Audio-CAN bus must be
terminated by 120 Ohm resistors.
If this DAX is the last unit connected to
the Audio-CAN bus, then an external
120
Ohm terminator must be fitted
between ‘CANH’ and ‘CANL’ terminals on
the DIN rail Interlink Adaptor.
Refer to Section “
DIN Rail Interlink
Adaptor
” (page
15
) for terminal allocation
details.
Figure 12
Cable Screen Connection Example
EXTERNAL
CABLING
EARTHING BAR
FIELD CONNECTION
CABLE
SCREEN
SCREEN TAILS TO BE < 3 cm
!
!
!
!
!
!
!
!
!
!
