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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
are needed. The unit requires a line frequency of
60HZ, but can be set for 50HZ as a special order or
update by contacting Lightronics. Power enters the
DB612 through the knockout sized holes in the left
end of the unit. A terminal block for connecting the
incoming power is located inside the left end of the
unit. There is also an earth ground lug.
The DB612 will not operate correctly using
only 2 phases of a 3 phase power service. This
holds true regardless of whether the unit is set
up for single or three phase power.
INSTALLATION
MAKE SURE THE INPUT POWER IS
DISCONNECTED BEFORE INSTALLING
THE DB612.
The DB612 is supplied to operate on THREE
PHASE 120/208 VAC power. It can be "field
converted' to operate on SINGLE PHASE 120/240
VAC. See the section "SINGLE PHASE POWER
CONNECTIONS" for information about converting to
Single phase power. The power input terminals are
rated for 3 AWG#10 wires, 4 AWG#12 wires or 5
AWG#14 wires. Terminal torque is 16 lb.-in max.
KNOCKOUTS
Power access to the DB612 is through the left end
cover plate which has dual knockouts. The right end
cover plate also has dual knockouts which "punch
out" in the opposite direction. These end cover
plates may be exchanged to accommodate your
particular installation.
CONVERTING TO RIGHT HAND END POWER
ACCESS
The DB612 may be field converted to provide power
connection access at the right hand end of the unit
while retaining correct orientation of the center
control panel. This is done by removing the center
control panel and reinstalling it upside down. When
this is done, the power input will be at the right end,
the control panel will still read "right side up" and the
channel outputs will correctly correspond to the
labeling.
The procedure is as follows:
1. Remove the eight screws which attach the center
panel to the main chassis and carefully pull the
panel out. Note the orientation of the two 6-pin, in-
line connectors which connect to the rear center of
the control circuit card.
2. Disconnect the two 6-pin inline connectors
(depress the latching tabs to release them). On the
circuit card these are labeled as J1 (upper) and J2
(lower). Also disconnect the 2-pin inline connector.
3. Rotate the center control panel so it reads upside
down and reinstall the 6-pin connectors. Do not
rotate or move the female connectors which have
wires in them. The connector which was attached to
J1 should now connect to J2 and vice versa.
4. Reconnect the 2-pin inline connector and reinstall
the control panel.
THREE PHASE POWER CONNECTIONS
True three phase power must be supplied to operate
the DB612 in the three phase configuration. This
means that each of the three input power hot legs
(L1, L2 and L3) must have a 120 degree electrical
phase offset from each other. The feed circuit must
be able to supply 20 Amps for each hot leg.
The DB612 is factory shipped to accommodate
THREE PHASE, 120/208 VAC, Wye 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 20
Amps per line (3 pole 20 Amp circuit breaker). The
minimum wire size is AWG#12. Wire may be either
stranded or solid. The terminals are intended for
copper wire only.
CONNECT POWER WIRES AS FOLLOWS
1. Remove the access cover at the end of the unit.
2. Connect the 3 "HOT" power input wires to the
L1, L2, L3
terminals.
3. Connect the neutral wire to the terminal marked
N
.
4 Connect a ground wire to the CHASSIS
GROUND terminal marked
G
.
When operating the DB612 on three phase power,
the DB612 expects a particular phase sequence for
these three input power connections. It does not
MAKE CERTAIN THE INPUT
POWER SOURCE IS DE-ENERGIZED
BEFORE MAKING CONNECTIONS.
