
XTBA DALI Watch Manual Page
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Product # - 03/2013
© XTBA 1986 – 2013
monitor the line for the data and where required will send information back to
the controller by the same method.
No power supply = no communications!
Power – from an existing DALI Buss Power Supply
The XTBA DALI Watch can be powered from an external PSU (via the power
input socket) or directly from the DALI Buss power – if available.
If the XTBA DALI Watch is powered from the DALI Buss (not from its own
supply) there is nothing more you need to do. If it finds DALI Buss Power it
will turn on, if not it won’t - isn’t technology a wonderful thing!
The XTBA DALI Watch takes about 35ma @15V from the DALI Buss (as you
asked) or with its external supply connected it will draw nothing from the DALI
Buss.
DALI Buss Power from the XTBA DALI Watch
When powered from the XTBA DALI Watches’ external PSU you can add
DALI Buss Power if not available. So fixtures can be simply bench tested,
installations half completed or sections of an installation can be tested without
the need to find another power supply.
How can you tell?
First connect the XTBA DALI Watch to the DALI data pair. When connected to
the DALI system (and in the main menu loop) if the blue led is off the system
already has DALI Buss Power connected. So you can now use the XTBA
DALI Watch.
If the blue LED is flashing quickly there is no DALI Buss Power available so
you will need to add power to the Buss.
Press the Function button until the following displays:
L O C A L
B U S S
P S U
O F F
Y e s
t o
t o g g l e
Pressing the Yes button will turn on Local DALI Buss Power, the blue LED will
stop flashing the display will change to tell you what the line voltage is, so you
should be ready to go. Pressing the Function button will take you back into the
main menu loop.
If you enter this menu when the unit is powered from external Dali Buss
Power and the Local Buss Power is off the display will change to:
L O C A L B U S S
P S U O F F
U S I N G E X T E R N A L B U S S
What you need to avoid is turning on Local Buss Power and then connecting
to the data pair. As you might end up having two Buss Power supplies on at
the same time. This probably won’t do much harm or the Watch will simply
reset back to the main menu with the Local Buss Power disconnected.