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DB612 DISTRIBUTED DIMMING BAR
Version: 1.1
OWNERS MANUAL
01/06/2022
www.lightronics.com
Lightronics Inc
509 Central Drive, Virginia Beach, VA 23454
Tel 757 486 3588
matter which phase is connected to the L1 terminal
but L2 and L3 must be in the correct order. The unit
will not be damaged if these two connections are
reversed but dimming will not occur correctly and
some channels will appear to be in an on/off mode.
If this occurs – see the “Phase Sensing Jumper”
section in this manual and set the jumper block for
three phase reverse operation.
SINGLE PHASE POWER CONNECTIONS
The DB612 may be field converted to accommodate
a SINGLE PHASE 120/240 VAC power service.
Consult the applicable electrical codes for your
location for exact wire specifications. The unit must
be powered from a circuit providing a minimum of 30
Amps per line (2 pole 30 Amp circuit breaker). The
minimum wire size is AWG#10. Wire may be either
stranded or solid. The terminals are intended for
copper wire only.
1 Remove the access cover at the end of the unit.
2 Connect the two "HOT" power input wires to the
L1
and
L3
terminals.
Note the terminal marked L2 is not used for
single phase operation.
3 Connect the neutral wire to the terminal marked
N
.
4 Connect a ground wire to the CHASSIS
GROUND terminal marked
G
.
There are two blue wires in the
L2
terminal on the
opposite side of the power input terminal strip.
These wires have color coded shrink tubing markers
on them. One of them is marked with BLACK. The
other is marked with RED.
5 Move the BLUE wire with the BLACK marker
from the
L2
terminal to the
L1
terminal.
6 Move the BLUE wire with the RED marker from
the
L2
terminal to the
L3
terminal.
A diagram of single phase power connections is
shown below:
PHASE SENSING JUMPER
There is a small black jumper block located on the
back of the control circuit board which must be set to
correspond to either single phase or three phase AC
input power. Install the jumper according to the
power at your facility using the diagram below. The
positions are shown below and are marked on the
circuit board. The control circuit board is mounted in
the inside of the main control panel which is the front
center panel on the unit. The Three Phase Reverse
setting is provided only to correct “out of sequence”
power input connections. Also see the section
“Three Phase Power Connections” for more
information concerning the Three Phase Reverse
setting.
The DB612 is usually shipped from the factory set
for Three Phase Normal operation.
Disconnect or turn off power to the unit
before changing jumper settings.
Factory Supplied Configuration
MAKE CERTAIN THE INPUT
POWER SOURCE IS DE-ENERGIZED
BEFORE MAKING CONNECTIONS.
SINGLE PHASE POWER
INPUT CONNECTIONS
THREE PHASE POWER
INPUT CONNECTIONS
